Why is hypervitaminosis involving water-soluble vitamins relatively UNCOMMON?
a. excessive amounts are readily absorbed into skeletal muscle tissue
b. excessive amounts are readily excreted in the urine
c. excessive amounts are stored in adipose tissue
d. excessive amounts are stored in the bones
Answer: b. excessive amounts are readily excreted in the urine
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Stimulation of a neuron that terminates in the superior region of the left postcentral gyrus would produce
A) a sensation in the right leg. B) a sensation in the lips. C) a muscle twitch in the right leg. D) a muscle twitch in the lips. E) both sensations and muscle twitches in the right leg.
Which condition occurs when the vertebrae fail to develop a complete neural arch and part of the spinal cord is exposed?
A. Anencephaly B. Microcephaly C. Multiple sclerosis D. Spina bifida E. Spinal meningitis
Cancerous cells can divide so rapidly that they will often produce a glycocalyx that is different than the other cells in the body. This may result in ________
A) allowing the cancer cells to bind to their healthy, neighboring cells B) a decrease in the permeability of the tumor cell's plasma membrane preventing the uptake of chemotherapy drugs C) the cancer cells conserving energy for more growth D) cells of the immune system recognizing the tumorous cells as foreign and destroying them
You notice that your father holds his book farther from his face than he used to. Since you are taking an anatomy and physiology course, you realize that this is due to
A) his photoreceptors having become less sensitive to light. B) his cataracts. C) a tumor on his optic nerve. D) a lack of vitreous humor in his eyeball's posterior cavity. E) his lens being unable to accommodate for close objects.