Which of the following proteins is most abundant in the human body?
A. Elastin
B. Collagen
C. Keratin
D. Reticulin
E. Actin
B. Collagen
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Which ventilates alveoli more effectively: slow, deep breaths or rapid, shallow breaths? Explain why
A) Slow, deep breaths because a smaller amount of the tidal volume of each breath is spent moving air into and out of the anatomic dead space. B) Slow, deep breaths because a larger amount of the tidal volume of each breath is spent moving air into and out of the anatomic dead space. C) Rapid, shallow breaths because a smaller amount of the tidal volume of each breath is spent moving air into and out of the anatomic dead space. D) Rapid, shallow breaths because a larger amount of the tidal volume of each breath is spent moving air into and out of the anatomic dead space.
Generally, a chemical buffer is described as
A. a strong acid or strong base that brings the pH of a solution to 7.0. ?B. a weak acid and weak base that help prevent big changes in pH.? C. a neutral molecule that does not influence the pH in any way.?D. a weak acid that makes a solution slightly more basic by its presence.
Which organelle is associated with energy production?
a. golgi body. b. lysosome. c. mitochondrion. d. RER. e. ribosome.
In a person with myopia (nearsightedness), light from a distant object is brought to a focal point ________
A) behind the retina B) in front of the retina C) on the retina