Which of the following statements is not correct?
Choose Your Option
A. In the knee-jerk reflex, stimulus is the stretching of muscle 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 mechanically gated potassium-ion channels
D. Rods are very sensitive and contribute to daylight vision