Which of the following hair colors is the result of a decrease in melanin?
A. red
B. white
C. brown
D. auburn
E. black
B
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Production of this vitamin requires skin exposure to the sun. This vitamin is crucial for regulation of calcium and phosphate.
A. Vitamin A B. Vitamin B12 C. Vitamin C D. Vitamin D E. Vitamin E
Branches of the ____ nerve are anesthetized before a doctor performs an episiotomy for childbirth
A. genitofemoral B. gluteal C. cutaneous femoral D. pudendal E. common fibular (peroneal)
What is the purpose of motor nerve varicosities as they relate to smooth muscle?
A. They prevent single-unit smooth muscle cells from pulling apart. B. They enable each cardiomyocyte to directly stimulate its neighbors. C. They link the thin filaments to the inside of the sarcolemma in smooth muscle. D. They reabsorb the decomposition products of acetylcholine after acetylcholinesterase breaks it down. E. They release neurotransmitter molecules onto smooth muscle cells.
Cholesterol, though it is NOT an energy molecule, has importance in the body because it ________
A) is a stabilizing component of the plasma membranes and is the parent molecule of steroid hormones B) helps mobilize fats during periods of starvation C) helps provide essential nutrients to the brain and lungs D) enters the glycolytic pathway without being altered