Internal respiration refers to
A. atmospheric air coming into the lungs.
B. gas exchange between the lungs and the blood.
C. gas exchange in the atmosphere.
D. gas exchange between the blood and body tissues.
E. cellular respiration.
D
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As blood is pumped into the arterial trunks past the semilunar valves, it
A. pushes against the cusps, forcing the valves open. B. fills the cusps, causing them to expand and open up for the flow of blood. C. fills the cusps, causing them to expand and block the backflow of blood. D. pushes against the cusps, forcing the valves closed. E. None of these answers is correct.
The fluid link between the external and internal environment is ________
A) plasma B) cerebrospinal fluid C) interstitial fluid D) intracellular fluid
In the body, copper is stored in the ________________________________________
Fill in the blank(s) with correct word
What do the left common carotid, brachiocephalic artery, and left subclavian all have in common?
A. They all are found in the abdominal cavity. B. They are all coronary vessels. C. They all carry blood to the head. D. They all branch from the aortic arch.