Which one of the following statements is not correct?
Correct answer: C. Retinal is a derivative of vitamin C
- A. Retinal is the light-absorbing portion of visual photopigments
- B. In the retina, rods have rhodopsin, while cones have three different photopigments
- C. Retinal is a derivative of vitamin C
- D. Rhodopsin is the purplish-red protein present in rods only
Explanation
Retinal is derived from vitamin A, not vitamin C. It is the chromophore that absorbs light in visual pigments.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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