For air to flow into or out of the lungs, there must be
A. a volume gradient established between the atmosphere and the alveoli.
B. a temperature gradient between the atmosphere and the alveoli.
C. a pressure gradient established between the atmosphere and the alveoli.
D. a diffusion gradient between the atmosphere and the alveoli.
E. None of these choices is correct.
C
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The term cephalad means
A. toward the tail end of the spine. B. away from the midline of the body. C. the back of the body or body part. D. toward the head. E. lying on the abdomen, face downward.
In the reaction between HCl and Ca(OH)2, the product CaCl2 will be a salt.
Answer the following statement true (T) or false (F)
The pleura is a thin, single-layered serosa that divides into parietal and visceral pleura.
a. true b. false
Which of the following will likely occur if glomerular blood pressure falls significantly?
A) Excretion of waste products will increase. B) Kidney filtration will stop. C) There will be no effect on pH control. D) Active secretion will occur normally in the distal convoluted tubule. E) The renin-angiotensin system is unaffected.