Oxygen-poor blood passes through the _________.
A. right AV (tricuspid) and pulmonary valves
B. right AV (tricuspid) valve only
C. left AV (mitral) and aortic valves
D. left AV (mitral) valve only
E. pulmonary and aortic valves
A. right AV (tricuspid) and pulmonary valves
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Blood volume varies with
A) body size. B) amount of adipose tissue. C) all of the above. D) changes in electrolyte and fluid concentrations.
What is the name of the special cells in the collecting ducts of the kidney that have the ability to increase decrease the secretion of H??
a. Intercalated cells b. Macula densa cells c. JG cells d. Principle cells
Describe the chorionic villi
A) The chorionic villi contain fluid that surrounds and cushions the embryo or fetus. B) The chorionic villi forms the interface between the embryonic/fetal system and the amniotic fluid. C) The chorionic villi forms the umbilical cord. D) The chorionic villi are structures that extend into the maternal tissues through which maternal blood flows. E) The chorionic villi form the yolk sac.
A transmural pressure gradient exists across the lung wall because the ____ pressure is less than the ____ pressure
a. intrapleural, intra-alveolar. b. intra-alveolar, intrapleural. c. intrapleural, atmospheric. d. atmospheric, intra-alveolar. e. none of these answers.