What is the role of spinal cord in reflex action?

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Solution

Dear Student

The spinal cord is concerned with the following three functions-
1) Reflexes below the neck
2) Conducts sensory impulses from the skin and muscles to the brain
3) Conducts motor responses from the brain to muscles of the trunk and the limbs
4) It acts as the main centre for reflex actions.
5) It acts as a link between spinal nerves and brain.
6) It participates in conscious actions.

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Spinal cord is involved in reflex action. It is the processing unit for reflex actions because __________.

What is meant by reflex action? Does only spinal cord act during this situation or brain helps too?

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)

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

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