When sodium ions are reabsorbed in response to the action of aldosterone, potassium
ions are
A) secreted. B) passively reabsorbed.
C) actively reabsorbed. D) reabsorbed.
(
Question 2) Muscle contractions of the uterine walls and ________ in the semen aid sperm cell
movement through the uterus and uterine tubes.
A) prostaglandins B) estrogen
C) progestins D) epinephrine
(
Question 3) Water channels in cell membranes formed by __________ are a result of ADH signaling
in the kidneys.
A) podocytes B) aquaporins C) cytopores D) pyrogens
(
Question 4) The number of sperm cells in an ejaculate averages
A) about 120 million per milliliter. B) about 20 million per millimeter.
C) about 20 million per liter. D) about 20 million per milliliter.
(
Question 5) Alveoli are kept clean by the action of
A) antibodies. B) macrophages.
C) surfactant. D) platelets.
(
Question 6) Fertilization usually occurs in the
A) vagina. B) ovary. C) uterus. D) uterine tube.
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Question 7) If glucose is not reabsorbed in the tubular fluid, ___________ increases.
A) the osmotic pressure B) glomerular filtration rate
C) hydrostatic pressure D) sodium reabsorption
(
Question 8) An important stimulus for the secretion of aldosterone is
A) falling potassium ion concentration. B) rising potassium ion concentration.
C) rising sodium ion concentration. D) rising calcium ion concentration.
(
Question 9) The respiratory membrane consists of
A) two thicknesses of epithelial cells and basement membranes.
B) two thicknesses of epithelial cells.
C) a single thickness of epithelial cells.
D) a single thickness of epithelial cells and a basement membrane.
(
Question 10) Semen
A) consists of sperm and secretions.
B) includes prostaglandins and nutrients.
C) is all of the above.
D) is alkaline.
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