All of the following are true regarding magnesium EXCEPT:
1.deficiency results in stunted growth in children.
2.it is needed for nerve activity.
3.overdose results in hemochromatosis.
4.plant foods are a good source.
3
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Which of the following describes an event in the visual response process?
a. Light energy strikes the retina and excites pigments to release retinal. b. Light energy strikes the cornea and excites pigments to release retinoic acid. c. Visual pigments deep in the brain are excited by light transmitted through the retina. d. Epithelial cells on the surface of the eye respond to light energy by transmitting opsin molecules along nerve pathways to the brain. e. Retinal in the visual cortex responds to electrical signals from the retina.
A 5'3" woman weighing 150 pounds is ______.
A. underweight B. at a healthy weight C. overweight D. obese
Barry is a vegan. His diet does not include foods that contain preformed vitamin A, and he does not take any vitamin A supplements. Nevertheless, his body has adequate vitamin A stores. Which of the following statements provides the best explanation for Barry's adequate vitamin A status?
A. His fat cells synthesize preformed vitamin A from essential fatty acids. B. His body does not require sources of vitamin A. C. He consumes foods that supply tryptophan, which his liver converts to preformed vitamin A. D. He eats plenty of foods that contain beta-carotene.
What are some of the possible causes of wasting seen in people with cirrhosis?