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Which of the following statement is NOT ...

Which of the following statement is NOT correct?

A

In the knee-jerk reflex, stimulus is the stretching of muscles and response is its contraction

B

An action potential in an axon does not move backward because the segment behind is in a refractory phase.

C

Depolarisation of hair cells of cochlea results in the opening of the mechnically gated potassium-ion channels

D

Rods are very sensitive and contribute to daylight vision.

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