The partial pressure of oxygen decreases at high altitude because the amount of oxygen in the air is decreased.
Answer the following statement true (T) or false (F)
False
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Which part of the embryo contributes to the fetal portion of the placenta?
A) trophoblast B) epiblast C) inner cell mass D) hypoblast
As compared to a midsagittal plane, a parasagittal plane divides the body into ________
A) unequal left and right portions B) anterior and posterior portions C) equal left and right portions D) superior and inferior portions
Which structure allows the action potential to travel deep into the interior of the cell to each contractile organelle?
A) Myofibril B) T-tubule C) Sarcolemma D) Sarcoplasm
What causes much of the blood in the fetal right atrium to be shunted to the left atrium through the foramen ovale?
A. The blood pressure in the right atrium is greater than in the left atrium. B. There is a valve that directs the blood that way. C. The fetus is in an antigravity situation provided by the amnionic fluid. D. The blood pressure in the left atrium is greater than in the right atrium. E. The umbilical arteries have valves.