pharmacy
All of the following statements concerning vitamin A functions are true EXCEPT:
a) Transmission of light stimuli to the brain, via combination with a specific protein, opsin, to form a visual pigment, rhodopsin, in the retina of the eye
b) Regulation of cell growth and differentiation in epithelium, connective tissues (including bone and cartilage) and hematopoietic tissues by retinoic acid, a highly bioactive metabolite of retinol
c) Retinoic acid is especially important during embryogenesis
d) Acts as a hormone involved in regulation of calcium and phosphorus homeostasis
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D
D
C
D
D