___________ is a visual pigment that helps transform light energy into a nerve impulse sent to the brain.
A) Retinoic acid
B) Opsin
C) Retinal
D) Rhodopsin
Correct Answer:
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Q15: Fat soluble vitamins are transported from the
Q16: Fat soluble vitamins require _ and _
Q17: Vitamin A is essential for _.
A)reproduction
B)growth
C)immune function
D)All
Q18: Deficiencies of vitamins _ and _ are
Q19: Which form of vitamin A is involved
Q21: Keratomalacia most severely effects the:
A)eyes.
B)liver.
C)skin.
D)tongue.
Q22: Which statement about vitamin D toxicity is
Q23: The action of sunlight on 7-dehydrocholesterol forms:
A)cholecalciferol.
B)retinol.
C)parathyroid
Q24: Xerophthalmia occurs from:
A)high intake of preformed vitamin
Q25: The primary function of vitamin D in
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