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NEET 2019
Exam
NEET
Year
2019
Subject
Zoology
Chapter
Neural Control and Coordination

NEET 2019 · Zoology · Neural Control and Coordination

Which of the following statements is not correct?

Which of the following statements is not correct?

Options

  1. AAn action potential in an axon does not move backward because the segment behind is in a refractory phase
  2. BDepolarisation of hair cells of cochlea results in the opening of the mechanically gated potassium-ion channels
  3. CRods are very sensitive and contribute to daylight vision
  4. DIn the knee-jerk reflex, stimulus is the stretching of muscle and response is its contraction

Correct answer

C. Rods are very sensitive and contribute to daylight vision

Step-by-step solution

Option (c) is not correct because rods and cones are photoreceptor cells in our eyes. The rod cells contain a purple pigment rhodopsin that is useful in night vision or scotopic vision. Daylight (photopic) vision and colour vision are the functions of cones.
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