Which hormone, produced by the placenta, stimulates the ovaries to continue producing estrogen and progesterone so that the lining of the uterine is not sloughed off in menses?
A) human chorionic gonadotropin (hCG)
B) follicle-stimulating hormone (FSH)
C) luteinizing hormone (LH)
D) human placental lactogen (hPL)
E) oxytocin
A
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Which number indicates a postganglionic axon?
A. 3 B. 4 C. 5 D. 6 E. 7
Which of the following is not detected by the peripheral chemoreceptors?
A. An increase in the level of hydrogen ions in the blood B. An increase in the level of carbon dioxide in the blood C. A decrease in the level of oxygen in the blood D. An increase in the level of sodium ions in the blood E. The peripheral chemoreceptors detect all of these changes.
The crown of a tooth is covered by
A) enamel. B) cement. C) dentin. D) pulp. E) periodontium.
Stimulation of the aortic baroreceptors reflexively results in
A) stimulation of the cardioaccelerator center in the brain. B) increased sympathetic stimulation of the heart. C) increased activity by the parasympathetic nervous system. D) stimulation of the vasoconstrictive center. E) increased heart rate.