The growth spurt seen in puberty is triggered by ________.
A. parathyroid hormone
B. thyroid hormone
C. growth hormone
D. calcitonin
E. sex hormones
Answer: E
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Which of the following would occur as a result of increased renin release by the kidneys?
A. An increase in blood volume B. A decrease in blood pressure C. A decrease in aldosterone D. An increase in urine output E. An increase in vasodilator secretion
A sharp blow to the ________ could result in rupture of the spleen.
A. umbilical region B. epigastric region C. left hypochondriac region D. left iliac region
In males, meiosis involves ________ cycle(s) of cell division and produces ________ cells, or gametes, each containing 23 individual chromosomes.
A) one; four B) two; four C) one; six D) two; two E) four; four
The primary germ layer that takes the place of the hypoblast is the
A. mesoderm. B. endoderm. C. centroderm. D. chorion. E. trophoblast.