Multiple Choice Questions

Control and Coordination

Updated for CBSE 2027
Board Exam Preparation
138+ Practice Questions
Notes

Practice Questions with Answers

Total 138 questions available

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Q. 1
In humans, the life processes are controlled and regulated by:
A
Nervous and endocrine systems
B
Endocrine and digestive systems
C
Respiratory and nervous systems
D
Reproductive and endocrine systems
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Q. 2
Growth related movements are known as
A
non directional movement
B
directional movement
C
Both a) and b)
D
tropic movements
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Q. 3
Cranium is related to:
A
head
B
limbs
C
thorax
D
abdomen
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Q. 4
The upward or down ward movement of shoot and root respectively is influenced by gravity. Such movement is called
A
Gravitism
B
Geotropism
C
Gravity movement
D
Gravitytropism
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Q. 5
People living in coastal areas suffer less from goiter. This is because
A
They eat sea food
B
All of the above
C
They drink sea water
D
They bathe in sea water
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Q. 6
Artifical ripening of fruit is carried out by
A
Ethylene
B
Auxins
C
Gibberellins
D
Abscisic acid (AB(a)
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Q. 7
Cretinism results due to :
A
under secretion of thyroxine.
B
Cretinism results due to :
C
excess secretion of adrenaline.
D
under secretion of growth hormone
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Q. 8
The root of a plant is
A
positively thigmotropic
B
negatively geotropic
C
positively geotropic
D
positively phototropic
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Q. 9
Which hormone is more abundant in places where cells are quickly dividing, like in fruits and seeds?
A
Pheromone
B
Auxin
C
Cytokinin
D
Renin
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Q. 10
The master gland of the body is the
A
pituitary
B
thyroid
C
adrenal
D
testis
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Q. 11
When a person is suffering from severe cold, he or she can not:
A
differentiate red light from green light.
B
differentiate the smell of a perfume from that of an agarbatti.
C
differentiate a hot object from a cold object
D
differentiate the taste of an apple from that of an ice-cream.
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Q. 12
The part of brain which controls the involuntary actions such as heart beat, breathing, blood pressure, etc.is :
A
medulla
B
cerebrum
C
cerebellum
D
pons
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Q. 13
Impulse is generated when:
A
stimulus is gained.
B
response is over.
C
stimulus is over.
D
response is going on.
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Q. 14
Which statement is not true about thyroxine?
A
Thyroxine regulates the basal metabolism of our body.
B
Iron is essential for synthesis of thyroxine.
C
Iodine is an important component required for synthesis of thyroxine.
D
Under secretion of thyroxine causes simple goitre.
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Q. 15
Which statement is correct?
A
Cytokinin causes leaves to wilt.
B
Electrical impulses cannot travel quickly.
C
Plant hormones are made in one place but move to where they're needed.
D
When light comes from one side of the plant, auxin moves towards the illuminated side of the shoot.
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Q. 16
A potted plant kept in a room tends to bend towards the direction of light. This movement is called
A
Phototropism
B
Photographism
C
Photonastism
D
Photoperiodism
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Q. 17
How do some plants like the pea plant climb up other plants or fences?
A
By flying
B
By crawling
C
By means of tendrils
D
By swimming
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Q. 18
The endocrine organ present in human female but not in human male is
A
Thymus
B
Pituitary gland
C
Ovary
D
Testis
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Q. 19
The gustatory receptors of our body are in one of the following organs. This organ is :
A
skin
B
ear
C
tongue
D
nose
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Q. 20
The olfactory receptors in humans are located in :
A
nose
B
eyes
C
tongue
D
ears
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Q. 21
How do growth-related movements of plants compare to movements in response to day and night?
A
Slower than
B
Faster than
C
Equal to
D
Likewise
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Q. 22
Which of the following endocrine glands is unpaired?
A
Adrenal
B
Testes
C
Pituitary
D
Ovary
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Q. 23
All the voluntary actions of our body are controlled by :
A
pons
B
medulla
C
cerebrum
D
cerebellum
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Q. 24
What are the three parts of our hind brain?
A
Spinal cord, cerebellum, and medulla oblongata
B
Hypothalamus, cerebrum, and cerebellum
C
Mid-brain, medulla, and cerebellum
D
Pons, medulla, and cerebellum
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Q. 25
Body coordination is exhibited by:
A
blood vascular system
B
nervous system
C
endocrine system
D
neuro-endocrine system
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Q. 26
The dramatic changes in body features associated with puberty are mainly because of the secretions of :
A
estrogen from adrenal gland and testosterone from pituitary gland
B
estrogen from testes and testosterone from ovary
C
testosterone from thyroid gland and estrogen from pituitary gland
D
testosterone from testes and estrogen from ovary
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Q. 27
The upward or down ward movement of shoot and root respectively is influenced by gravity. Such movement is called-
A
Gravitism
B
Geotropism
C
Gravity movement
D
Gravitytropism
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Q. 28
What does it mean when it's said that a tendril is sensitive to touch?
A
It reacts to pressure
B
It can feel heat
C
It emits light
D
It moves randomly
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Q. 29
Which term best describes the function of adrenaline in the body?
A
Constrictor
B
Regulator
C
Stimulant
D
Hormone
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Q. 30
The direction of impulse in a typical neuron is
A
Both a and b are wrong
B
Axon to dendron
C
Dendron to axon
D
Both a and b are correct
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Q. 31
The brain is responsible for-
A
regulating heart-beat
B
balancing body
C
thinking
D
all of these
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Q. 32
Pineal gland is situated on the
A
ventral surface of the forebrain
B
dorsal surface of the hindbrain
C
dorsal surface of the forebrain
D
ventral surface of the midbrain
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Q. 33
What is the primary function of adrenaline in the body?
A
To slow down bodily functions
B
To limit tissue response
C
To provide wide-ranging changes to all cells
D
To reduce the effectiveness of chemical signals
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Q. 34
If there is a deficiency of growth hormone the child becomes _____.
A
Giant
B
Dwarf
C
Blind
D
Mentally retarded
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Q. 35
The contraction of pupil of the eye in the presence of bright light is an example of :
A
Spinal reflex
B
Adrenal reflex
C
Cerebral reflex
D
Voluntary reflex
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Q. 36
The timing and amount of hormone released is regulated by
A
feedback mechanism
B
pituitary mechanism
C
endocrine gland
D
pancreas
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Q. 37
The structural and functional unit of nervous system is:
A
Axon
B
Nephron
C
Neuron
D
Cyton
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Q. 38
Learning is related to
A
Cerebrum
B
Cerebellum
C
Hypothalamus
D
Thalamus
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Q. 39
Medulla oblongata is
A
a part of the midbrain
B
last part of the hindbrain
C
a part of the hindbrain
D
a part of the forebrain
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Q. 40
Why do plants like the pea plant use tendrils to climb?
A
To get exercise
B
To reach sunlight
C
To avoid predators
D
To support their growth
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Q. 41
The junction between two neurons is called
A
axon
B
joint
C
synapse
D
dendrite
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Q. 42
Which glands secrete adrenaline in the body?
A
Pituitary glands
B
Adrenal glands
C
Thyroid glands
D
Pancreatic glands
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Q. 43
Involuntary actions in the body are controlled by:
A
Medulla in fore brain
B
Medulla in hind brain
C
Medulla in spinal cord
D
Medulla in mid brain
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Q. 44
What does the plant hormone abscisic acid do?
A
Manage diseases in plants
B
Aid in flowering
C
Encourage plant height
D
Slow down plant growth
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Q. 45
Name the layer of brain from inside towards the outside:
A
Piamater, Arachnoid and Duramater
B
Arachnoid, Duramater and Piamater
C
Duramater, Arachnoid and Piamater
D
Arachnoid, Piamater and Duramater
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Q. 46
Which aspect of fruit development and ripening are affected by plant hormones?
A
Seed formation
B
Sugar content
C
Color change
D
All of the above
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Q. 47
Reflex arc is formed by
A
neither of the above
B
dorsal sensory nerve and ventral motor nerve
C
both (a) and (b)
D
ventral sensory nerve and dorsal motor nerve
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Q. 48
Which is a correct statement?
A
Cerebrum controls intelligence.
B
Cranium is covered by cerebrospinal fluid.
C
Cerebellum controls intelligence.
D
Olfactory lobes and optic lobes lie in the sameregion .
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Q. 49
The function of sensory nerve is to carry
A
message from CNS
B
detect heat / light
C
bones and nerves
D
message to Brain
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Q. 50
What type of action is blinking of eyes?
A
Locomotor action
B
Skeletal movement
C
Voluntary action
D
Reflex action
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Q. 51
The brain is responsible for :
A
regulating the heart beat
B
balancing the body
C
all of the above
D
thinking
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Q. 52
Insulin helps in
A
regulating fat metabolism
B
promoting growth
C
regulating blood sugar levels
D
regulating amount of H2O
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Q. 53
What makes it seem like plants are moving in response to stimuli?
A
They can walk
B
They can jump
C
Their growth is directional
D
They make sounds
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Q. 54
Involuntary actions including blood pressure, salivation and vomiting are controlled by the __________ in the hind-brain.
A
Cerebellum
B
Medulla
C
Cerebrum
D
Medals
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Q. 55
The use of iodised salt is recommended to prevent :
A
gonorrhoea
B
diabetes
C
goitre
D
dysentery
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Q. 56
Dramatic changes of body features associated with puberty are mainly because of secretion of:
A
Estrogen from adrenal gland and testosterone from pituitary gland.
B
Estrogen from testes and testosterone from ovary
C
Testosterone from testes and estrogen from ovary.
D
Testosterone from thyroid gland and estrogen from pituitary gland.
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Q. 57
Which of the following does not act as an endocrine gland as well as an exocrine gland ?
A
pituitary
B
pancreas
C
pineal
D
parathyroid
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Q. 58
The direction of impulse in a typical neuron is
A
Both a and b are wrong
B
Axon to dendron
C
Both a and b are correct
D
Dendron to axon
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Q. 59
Which term is used interchangeably with "plant hormones"?
A
Organic substances
B
Phytohormones
C
Growth regulators
D
Differentiation substances
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Q. 60
Which of these plant hormones is a growth inhibitor?
A
Cytokinin
B
Gibberellin
C
Auxin
D
Abscisic acid
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Q. 61
What is the purpose of tendrils being sensitive to touch?
A
To avoid obstacles
B
To find water
C
To capture prey
D
To climb up supports
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Q. 62
____________ is a growth inhibiter hormone in plants.
A
Gibberellic acid
B
Auxin
C
Abscicic acid
D
Cytokinin
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Q. 63
Sapna suffers from a condition due to which her average blood sugar level is 174 mg/dL. The average blood sugar level in a healthy adult is <140 mg/dL.
Which of the following could be the cause of Sapna's condition?
A
excess production of thyroxine in her body.
B
insufficient production of thyroxine in her body.
C
excess production of insulin in her body.
D
insufficeint production of insulin in her body.
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Q. 64
The substance that triggers the fall of mature leaves and fruits from plants is due to
A
Auxin
B
Gibberellins
C
Cytokinin
D
Abscisic acid
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Q. 65
What does the brain do with the information from our senses?
A
It ignores it
B
It interprets it
C
It creates it
D
It stores it
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Q. 66
Which among them is a reflex action?
A
Sensory - relay - motor neuron
B
Relay - Motor -Sensory
C
Motor neuron - relay - Motor neuron
D
Sensory neuron ---- Motor neuron ---- Relay neuron
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Q. 67
Which part of the brain controls involuntary muscle actions?
A
Medulla
B
Cerebrum
C
Cerebellum
D
Hypothalamus
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Q. 68
The gap between two neurons is called _____
A
Synapse
B
Synthesise
C
Dendron
D
Axon
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Q. 69
Which of the following are often called glands of emergency ?
A
adrenal
B
thyroid
C
pancreas
D
pituitary
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Q. 70
What makes up the peripheral nervous system?
A
Nerves from the brain and nerves from the spinal cord.
B
Nerves from the skull and nerves from the spinal cord.
C
Skull, spinal nerves
D
Skull, spinal cord
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Q. 71
Why is it significant that different parts of the brain have specific functions?
A
It makes the brain less efficient
B
It allows for better understanding of brain diseases
C
It hinders research efforts
D
It doesn't impact brain functions
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Q. 72
Brain is contained in a bony- box consisting of a fluid filled ballon for
A
protection of nerves
B
shock absorption
C
sending information
D
connection with spinal cord
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Q. 73
The gap between two neurons is called _____.
A
Dendron
B
Axon
C
Synapse
D
Synthesise
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Q. 74
If there is a deficiency of growth hormone the child becomes _____.
A
Giant
B
Dwarf
C
Blind
D
Mentally retarded
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Q. 75
If there is a deficiency of growth hormone the child becomes _____.
A
Mentally retarded
B
Dwarf
C
Blind
D
Giant
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Q. 76
What is the primary role of the human brain?
A
Controlling behavior
B
Digesting food
C
Pumping blood
D
Regulating body temperature
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Q. 77
Which ofthe following is not a reflex action?
A
Knee jerk
B
Boxing
C
Coughing
D
Eye lid closing
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Q. 78
In humans, the life processes are controlled and regulated by
A
Endocrine System and digestive systems
B
Nervous System and endocrine systems
C
Respiratory System and nervous systems
D
Reproductive System and endocrine systems
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Q. 79
Dwarfism results due to :
A
less secretion of adrenaline hormone
B
less secretion of growth hormone
C
excessive secretion of thyroxine hormone
D
excessive secretion of growth hormone
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Q. 80
Reflex action is controlled mainly by the
A
autonomous nervous system
B
peripheral nervous system
C
brain
D
spinal cord
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Q. 81
The endocrine organ present in human female but not in human male is
A
Ovary
B
Pituitary gland
C
Testis
D
Thymus
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Q. 82
CNS consists of:
A
brain
B
spinal cord
C
only cerebrum
D
both (a) and (b)
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Q. 83
The response of plant parts towards light is called
A
chemotropism
B
hydrotropism
C
geotropism
D
phototropism
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Q. 84
The activities of the internal organs are controlled by
A
the peripheral nervous system
B
the autonomic nervous system
C
none of these
D
the reflex arc
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Q. 85
A doctor advised a person to take injection of insulin because :
A
his blood sugar was high
B
his thyroxine level in blood was high
C
his heart beat was high
D
his blood pressure was high
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Q. 86
What is the role of plant hormones in fruit development?
A
Inhibiting seed formation
B
Accelerating sugar accumulation
C
Controlling water absorption
D
Delaying color change
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Q. 87
The upward or down ward movement of shoot and root respectively is influenced by gravity. Such movement is called
A
Gravitytropism
B
Geotropism
C
Gravitism
D
Gravity movement
Click an option to check your answer
Q. 88
____________ is a growth inhibiter hormone in plants.
A
Abscicic acid
B
Gibberellic acid
C
Cytokinin
D
Auxin
Click an option to check your answer
Q. 89
The growth of pollen tubes towards ovules is due to____.
A
geotropism
B
hydrotropism
C
chemotropism
D
phototropism
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Q. 90
Which plant hormone makes cells grow longer on the side of the shoot that's not facing light?
A
Auxin
B
Renin
C
Pheromone
D
Cytokinin
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Q. 91
How do tendrils help plants like the pea plant?
A
By providing shade
B
By aiding in climbing
C
By attracting pollinators
D
By collecting nutrients
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Q. 92
Gustatory receptors will detect ______ .
A
Smell
B
light
C
Touch
D
Taste
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Q. 93
Which of the following is a plant hormone?
A
Insulin
B
Oestrogen
C
Thyroxine
D
Cytokinin
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Q. 94
Why is it beneficial for a chemical signal to reach all cells of the body?
A
To provide widespread changes in preparation for activity
B
To prevent cell communication
C
To limit cell response
D
To slow down cell activity
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Q. 95
The endocrine organ present in human female but not in human male is
A
Thymus
B
Pituitary gland
C
Ovary
D
Testis
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Q. 96
Gustatory receptors will detect ______ .
A
Smell
B
light
C
Touch
D
Taste
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Q. 97
What advantage does a chemical signal like adrenaline provide over electrical impulses?
A
It slows down bodily functions
B
It limits tissue response
C
It provides wide-ranging changes to all cells
D
It reduces the effectiveness of nerve cells
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Q. 98
Which one of the following pairs of brain part and its functions is not correctly matched?
A
Medulla Oblongata - Involuntary activities
B
Pons - Consciousness
C
Cerebrum - Memory and intelligence
D
Cerebellum - Balance and posture
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Q. 99
What are the main physiological processes influenced by plant hormones?
A
Flowering, seed production, and photosynthesis
B
Root absorption, stem elongation, and leaf senescence
C
Growth, differentiation, and development
D
Pest resistance, water uptake, and nutrient transport
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Q. 100
Which of the following is a plant hormone?
A
Thyroxin
B
Cytokinin
C
Insulin
D
Oestrogen
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Q. 101
Hypothalamus is a part of:
A
Mid brain
B
Medulla
C
Fore brain
D
Hind brain
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Q. 102
Rhythms of sleep in our body are controlled by:
A
Thymus gland
B
ACTH
C
Pineal gland
D
ADH
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Q. 103
How does adrenaline impact bodily responses during emergencies?
A
It slows down responses
B
It speeds up responses
C
It has no effect on responses
D
It stops responses altogether
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Q. 104
The faulty functioning of an endocrine gland can make a person very short or very tall. This gland is :
A
adrenal
B
thyroid
C
pituitary
D
pineal
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Q. 105
Why is the brain still considered incomprehensible?
A
Lack of interest in brain research
B
Limited technology
C
Difficulty in understanding its functions
D
Lack of funding
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Q. 106
How do plants respond to stimuli like touch?
A
By growing in a particular direction
B
By hiding underground
C
By standing still
D
By flying away
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Q. 107
Which of the following is not strictly considered as a part of the neuron?
A
nissl bodies
B
myelin sheath
C
dendrites
D
axon
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Q. 108
What causes a tendril to circle around an object it touches?
A
Increased growth on the contact side
B
Decreased growth on the contact side
C
Lack of sensitivity
D
Random movement
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Q. 109
In neuron, conversion of electrical signal to a chemical signal occurs at
A
dendritic end
B
axon
C
axonal end
D
cell-body
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Q. 110
____________ is a growth inhibiter hormone in plants.
A
Cytokinin
B
Abscicic acid
C
Auxin
D
Gibberellic acid
Click an option to check your answer
Q. 111
What is the source of adrenaline in the body?
A
Brain
B
Heart
C
Adrenal glands
D
Kidneys
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Q. 112
The direction of impulse in a typical neuron is
A
Axon to dendron
B
Dendron to axon
C
Both a and b are wrong
D
Both a and b are correct
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Q. 113
While touching a hot plate, a reflex action is seen what is the effector in it?
A
spinal cord
B
brain
C
skin
D
muscles
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Q. 114
What are tendrils?
A
Root systems
B
Sensory organs
C
Leafy structures
D
Climbing structures
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Q. 115
The plant hormone essential for cell division is
A
gibberellin
B
abscisic acid
C
auxin
D
cytokinin
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Q. 116
Nerves throughout the body other than Brain and spinal cord form ___.
A
AAS
B
CNS
C
PNS
D
ANS
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Q. 117
Which group of fruits do plant hormones primarily regulate in terms of development and ripening?
A
Citrus fruits
B
Stone fruits (e.g., peaches, plums)
C
Berries (e.g., strawberries, blueberries)
D
All types of fruits equally
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Q. 118
People living in coastal areas suffer less from goiter. This is because
A
They drink sea water
B
They bathe in sea water
C
All of the above
D
They eat sea food
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Q. 119
The seat of intelligence and voluntary action in the brain is the
A
pons
B
cerebellum
C
medulla oblongata
D
cerebrum
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Q. 120
Olfactory reception is related to sense of:
A
none of these
B
smelling
C
tasting
D
vision
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Q. 121
Why is the use of adrenaline important for animals, including humans?
A
It enables rapid, widespread changes in the body
B
It decreases the effectiveness of nerve cells
C
It provides a more controlled response to stimuli
D
It limits the range of tissues responding
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Q. 122
The fluid that lies above and below the meninges of the brain is called
A
plasma
B
cerebrospinal fluid
C
serum
D
lymph
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Q. 123
How have researchers progressed in understanding the brain?
A
They have unlocked all its secrets
B
They have focused only on understanding the brain's structure
C
They have gained insights into healthy functioning and disease causes
D
They have prioritized studying unrelated topics
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Q. 124
Receptor for stimulus are present in:
A
stomach
B
sense organs
C
response
D
hot objects
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Q. 125
Involuntary actions including blood pressure, salivation and vomiting are controlled by the __________ in the hind-brain.
A
Cerebellum
B
Cerebrum
C
Medals
D
Medulla
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Q. 126
What happens to a tendril when it comes in contact with a support?
A
It stops growing
B
It grows faster
C
It becomes weaker
D
It changes color
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Q. 127
People living in coastal areas suffer less from goiter. This is because
A
They bathe in sea water
B
All of the above
C
They drink sea water
D
They eat sea food
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Q. 128
Select the mismatched pair.
A
Thyroxine: Thyroid gland
B
Adrenaline: Pituitary gland
C
Testosterone : Testes
D
Estrogen: Ovary
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Q. 129
A potted plant kept in a room tends to bend towards the direction of light. This movement is called
A
Photoperiodism
B
Photographism
C
Phototropism
D
Photonastism
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Q. 130
In a neuron, the conversion of electrical signal to a chemical signal occurs at/in :
A
myelin sheath
B
axon end
C
cell body
D
dendrite end
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Q. 131
Which among them is not a voluntary action of body?
A
Talking
B
Breathing
C
Writing
D
Walking
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Q. 132
The part of brain which takes part in regulating respiration in the human body is :
A
cerebrum
B
medulla
C
cerebellum
D
pons
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Q. 133
The endocrine gland whose malfunctioning causes diabetes disease is :
A
pineal
B
pancreas
C
parathyroid
D
pituitary
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Q. 134
People suffering from diabetes mellitus are unable to secrete sufficient
A
testosterone
B
insulin
C
adrenaline
D
thyroxine
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Q. 135
How would relying only on electrical impulses affect tissue response in squirrels?
A
Tissues would prepare for activity more efficiently
B
Tissues would not respond effectively
C
Tissues would become overactive
D
Tissues would not respond at all
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Q. 136
Why might relying solely on electrical impulses via nerve cells limit tissue response?
A
Because nerve cells are slow
B
Because nerve cells only reach certain tissues
C
Because nerve cells cannot carry chemical signals
D
Because nerve cells are not effective
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Q. 137
Input and output nerves meet at
A
CNS
B
muscles
C
heart
D
liver
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Q. 138
A connection between nerves which detect heat / light etc and nerves that moves muscles is called
A
reflex action
B
neuromuscular junction
C
human brain
D
reflex arc
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