Which of the following are cytokines?
A) Antibodies and antigens
B) Colony-stimulating factors, interferons, interleukins, tumor necrosis factor
C) Histamine and leukotrienes
D) Autoantibodies and immunosuppressants
B
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The neuromuscular junction is usually located at one of the two ends of the muscle fiber
Indicate whether this statement is true or false.
Fertilization typically occurs in the _________, and it restores the _________ number of chromosomes
A. ampulla of the uterine tube; haploid B. ampulla of the uterine tube; diploid C. body of the uterus; polyploid D. isthmus of the uterine tube; haploid E. isthmus of the uterine tube; polyploid
The central sulcus separates which lobes?
A) frontal from parietal B) frontal from temporal C) parietal from occipital D) temporal from parietal
Nancy is 8 months pregnant. Her physician mentioned that the placental LH-like hormone levels had decreased. Should Nancy be concerned?
A. Yes; a drop in the secretion of an LH-like substance this late in the pregnancy will disrupt normal embryonic development. B. No; the placenta doesn't normally secrete an LH-like substance at any time during pregnancy. C. Yes; the secretion of an LH-like substance by the placenta throughout the pregnancy is necessary to maintain the pregnancy. D. No; the secretion of an LH-like substance by the placenta is important in the first trimester, and Nancy's pregnancy is beyond the first trimester.