The largest muscle fiber type is
A) cardiac fibers.
B) smooth fibers.
C) slow fibers.
D) fast fibers.
E) intermediate fibers.
D) fast fibers.
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A product of the metabolism of certain nucleic acid bases is
A. uric acid. B. ammonia. C. water. D. urea.
CO = ________ × SV.
Fill in the blank(s) with the appropriate word(s).
Important differences between the respiratory system of a newborn infant and a fetus that relates to the cardiovascular system includes which of the following? A) compressed ribs
B) collapsed pulmonary vessels C) lung conducting passageways containing only a small amount of fluid and no air D) high pulmonary arterial resistance E) All of the answers are correct.
Which of the following statements concerning cross bridges is not correct? Cross bridges
a. cross bridges bind to actin during muscle contraction. b. cross bridges are formed by the globular heads of the myosin molecules. c. formation is tied to Cl- levels in the cytosol d. cross bridges bend during muscle contraction. e. cross bridges protrude from the thick filaments.