Neural Control and Coordination Question 45
45. Which of the following statements is not correct?
[2019]
(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.
Show Answer
Answer : d
Hints & Solutions
(d) Rods and cones are two types of photoreceptor in human retina. Cones are very sensitive to operate in day light. They are capable of colour vision and responsible for high spatial acuity. Rods are very sensitive in dim light and do not mediate colour vision and have a low spatial acuity.
