The type of transport protein that moves a substance down its concentration gradient is a
A. pump.
B. channel.
Answer: B
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Normally, all the H+ ions generated from CO2 in tissue capillaries recombine with bicarbonate in pulmonary capillaries and are removed from the body as CO2.
Answer the following statement true (T) or false (F)
During inhalation, air continues to move into the lungs until
A) the internal pressure is the same is atmospheric pressure. B) the internal pressure is less than atmospheric pressure. C) the internal pressure is greater than atmospheric pressure. D) the compliance of the lung decreases. E) the lungs recoil.
Which process is regulated by secretions of the thyroid gland??
A) ?Digestion B) ?Metabolism C) ?Defecation D) ?Absorption
Among the Chinese, _____ is the term used for sexual intercourse.
A. yin fu B. yan ju C. huo yin yang D. yin yang