When an enemy cell is present, a(n) ________ secrete perforins, which bore a hole in the enemy cell membrane
A) antibody
B) interferon
C) natural killer cell
D) interleukin
E) opsonization
C
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Select the correct statement about testosterone control.
A) GnRH from the hypothalamus causes FSH and LH release from the anterior pituitary. B) FSH stimulates testicular production of testosterone. C) Inhibin and testosterone exert positive feedback on the hypothalamus and pituitary. D) The pineal gland is believed to be the gland that exerts the most influence in testosterone control.
The ___________is a muscular organ that stores urine.
Fill in the blank(s) with the appropriate word(s).
Which of the following is not a plexus of the vagus nerve?
A) cardiac B) pulmonary C) celiac D) esophageal
The symptoms of constipation are due to
a. inhibition of gastric emptying b. absorption of toxins of bacterial origin from the colon c. prolonged distention of the large intestine by the fecal mass d. exhaustion due to frequent straining movements during the defecation reflex e. accumulation of large amounts of fluid in the colon