SolveIt is under development
SolveItNCERT · CBSE · NEET

NCERT Exemplar · Class 10 Science Control and Coordination

53 questions · 53 still being checked

Multiple Choice Questions 1–10 (part 1 of 5)

  1. Exercise 1

    Which of the following statements is correct about receptors?
    (a)
    Gustatory receptors detect taste while olfactory receptors detect smell
    (b)
    Both gustatory and olfactory receptors detect smell
    (c)
    Auditory receptors detect smell and olfactory receptors detect taste
    (d)
    Olfactory receptors detect taste and gustatory receptors smell

    Matches the book, not yet reviewed

    This working reaches the answer NCERT prints. It has not yet been read through by hand.

    NCERT’s answer
    (a)
    (a) Gustatory receptors detect taste while olfactory receptors detect smell. Taste and smell are sensed by separate, dedicated receptor types on tongue and nose.

  2. Exercise 2

    Electrical impulse travels in a neuron from
    (a)
    Dendrite → axon → axonal end → cell body
    (b)
    Cell body → dendrite → axon → axonal end
    (c)
    Dendrite → cell body → axon → axonal end
    (d)
    Axonal end → axon → cell body → dendrite

    Matches the book, not yet reviewed

    This working reaches the answer NCERT prints. It has not yet been read through by hand.

    NCERT’s answer
    (c)
    (c) Dendrite \(\displaystyle \rightarrow\) cell body \(\displaystyle \rightarrow\) axon \(\displaystyle \rightarrow\) axonal end. A nerve impulse is received at the dendrite, passes through the cell body, travels down the axon, and reaches the axonal end.

  3. Exercise 3

    In a synapse, chemical signal is transmitted from
    (a)
    dendritic end of one neuron to axonal end of another neuron
    (b)
    axon to cell body of the same neuron
    (c)
    cell body to axonal end of the same neuron
    (d)
    axonal end of one neuron to dendritic end of another neuron

    Matches the book, not yet reviewed

    This working reaches the answer NCERT prints. It has not yet been read through by hand.

    NCERT’s answer
    (d)
    (d) Axonal end of one neuron to dendritic end of another neuron. At a synapse the axon terminal releases a neurotransmitter that diffuses across the gap and excites the next neuron's dendrite.

  4. Exercise 4

    In a neuron, conversion of electrical signal to a chemical signal occurs at/in
    (a)
    cell body
    (b)
    axonal end
    (c)
    dendritic end
    (d)
    axon

    Matches the book, not yet reviewed

    This working reaches the answer NCERT prints. It has not yet been read through by hand.

    NCERT’s answer
    (b)
    (b) Axonal end. The electrical impulse reaching the axon terminal triggers release of a neurotransmitter, converting it to a chemical signal that crosses the synapse.

  5. Exercise 5

    Which is the correct sequence of the components of a reflex arc?
    (a)
    Receptors→ Muscles→ Sensory neuron→ Motor neuron→ Spinal cord
    (b)
    Receptors → Motor neuron → Spinal cord → Sensory neuron → Muscle
    (c)
    Receptors → Spinal cord → Sensory neuron → Motor neuron → Muscle
    (d)
    Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle

    Matches the book, not yet reviewed

    This working reaches the answer NCERT prints. It has not yet been read through by hand.

    NCERT’s answer
    (d)
    (d) Receptors \(\displaystyle \rightarrow\) Sensory neuron \(\displaystyle \rightarrow\) Spinal cord \(\displaystyle \rightarrow\) Motor neuron \(\displaystyle \rightarrow\) Muscle. A stimulus is sensed, carried inward by a sensory neuron, and the outgoing motor neuron carries the response to the muscle.

  6. Exercise 6

    Which of the following statements are true?
    (i)
    Sudden action in response to something in the environment is called reflex action
    (ii)
    Sensory neurons carry signals from spinal cord to muscles
    (iii)
    Motor neurons carry signals from receptors to spinal cord
    (iv)
    The path through which signals are transmitted from a receptor to a muscle or a gland is called reflex arc
    (a) (i) and (ii)
    (b) (i) and (iii)
    (c) (i) and (iv)
    (d) (i) , (ii) and (iii)

    Matches the book, not yet reviewed

    This working reaches the answer NCERT prints. It has not yet been read through by hand.

    NCERT’s answer
    (c)
    (c) (i) and (iv). (ii) and (iii) are swapped: sensory neurons carry signals to the spinal cord, motor neurons carry signals from it to muscles.

  7. Exercise 7

    Which of the following statements are true about the brain?
    (i)
    The main thinking part of brain is hind brain
    (ii)
    Centres of hearing, smell, memory, sight etc are located in fore brain.
    (iii)
    Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hind brain
    (iv)
    Cerebellum does not control posture and balance of the body
    (a) (i) and (ii)
    (b) (i), (ii) and (iii)
    (c) (ii) and (iii)
    (d) (iii) and (iv)

    Matches the book, not yet reviewed

    This working reaches the answer NCERT prints. It has not yet been read through by hand.

    NCERT’s answer
    (c)
    (c) (ii) and (iii). Cerebrum, not hindbrain, is the main thinking centre, and the cerebellum does control posture and balance, so (i) and (iv) are false.

  8. Exercise 8

    Posture and balance of the body is controlled by
    (a)
    cerebrum
    (b)
    cerebellum
    (c)
    medulla
    (d)
    pons

    Matches the book, not yet reviewed

    This working reaches the answer NCERT prints. It has not yet been read through by hand.

    NCERT’s answer
    (b)
    (b) cerebellum. It coordinates voluntary muscle movements and maintains posture and balance; cerebrum governs thinking, medulla controls involuntary actions like heartbeat.

  9. Exercise 9

    Spinal cord originates from
    (a)
    cerebrum
    (b)
    medulla
    (c)
    pons
    (d)
    cerebellum

    Matches the book, not yet reviewed

    This working reaches the answer NCERT prints. It has not yet been read through by hand.

    NCERT’s answer
    (b)
    (b) medulla. The medulla oblongata, the hindmost part of the hindbrain, extends downward and continues as the spinal cord carrying signals to and from the body.

  10. Exercise 10

    The movement of shoot towards light is
    (a)
    geotropism
    (b)
    hydrotropism
    (c)
    chemotropism
    (d)
    phototropism

    Matches the book, not yet reviewed

    This working reaches the answer NCERT prints. It has not yet been read through by hand.

    NCERT’s answer
    (d)
    (d) phototropism. Auxin moves to and accumulates on the shaded side of the shoot, elongating those cells more, so the tip bends and grows towards light.