How many chromosomes do human primary oocytes contain?
a. 48
b. 46
c. 32
d. 24
e. 23
b
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Short-loop negative feedback occurs when hormones from the ________ inhibit hormone secretion by the ________.
A. adrenal cortex; anterior pituitary B. anterior pituitary; hypothalamus C. adrenal cortex; hypothalamus D. anterior pituitary; adrenal cortex E. hypothalamus; anterior pituitary
How does fluid accumulation in the lungs affect vital capacity?
A) Vital capacity increases in females but not in males. B) Vital capacity decreases in females but not in males. C) Vital capacity increases in both sexes equally. D) Vital capacity decreases in both sexes equally. E) Accumulating fluid has no effect on vital capacity.
Which of these hormones can enter the target cell and bind to receptors in the nucleus?
A. Luteinizing hormone B. Insulin C. Testosterone D. Growth hormone E. Angiotensin
Which germ layer is most muscle derived from?
A. ectoderm B. mesoderm C. endoderm