The volume of air available for gas exchange per minute is called the
A. vital capacity.
B. alveolar ventilation.
C. minute respiratory volume.
D. functional residual capacity.
E. respiratory rate.
B
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Aging affects the appearance of the skin, producing wrinkles and sagging due to decreased collagen and elastin formation.
Answer the following statement true (T) or false (F)
Which of the following describe the regeneration capacity of cardiac muscle cells?
a) limited, via satellite cells b) limited, under certain conditions c) considerable (compared with other muscle cells, but limited compared with epithelium), via pericytes d) all of these are correct e) none of these are correct
A thin layer of tissue that covers an organ or lines a cavity is a
A. dendrite. B. pseudostratified columnar epithelium. C. neuroglia. D. membrane. E. mesoderm.
Which of the following statements concerning types of muscle contractions is false?
A. In isometric contractions, the amount of tension produced by the muscle is constant. B. In isotonic contractions, the muscle fibers shorten. C. The contractile processes in isometric and isotonic contractions are the same. D. Most skeletal muscle contractions are a combination of isometric and isotonic contractions. E. In isotonic contractions, the amount of tension produced by the muscle fibers is constant during the contraction.