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Question

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 electrical signals from spinal cord to muscles in a reflex action

(iii) motor neurons carry signals from receptors to spinal cord in a reflex action

(iv) the pathway of transmitting signals from a receptor to a muscle is a reflex action

(a) (i) and (ii)

(b) (i) and (iii)

(c) (i) and (iv)

(d) (i) , (ii) and (iii)


Solution

Answer :

(c) (i) and (iv)

Statements (i) and (iv) are correct, while statements (ii) and (iii) are not. Sensory neurons carry signals from the receptors to the brain or the spinal cord, while motor neurons carry signals from the brain or the spinal cord to the effector organs like muscles and glands.

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