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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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.
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