Where would you expect to find numerous gap junctions in muscular tissue?
A) The sarcoplasmic reticulum of skeletal muscle
B) The intercalated discs of cardiac muscle
C) The A bands of skeletal and cardiac muscle
D) Multiunit smooth muscle
E) The sarcolemma of skeletal muscle
B
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Contraction of striated muscle is regulated by
A) TnC's affinity for Ca2+ (and nothing else). B) Alternating the two available isoforms of myosin. C) Utilizing different combinations of muscle protein isoforms. D) The rate at which Ca2+ is able to bind to actin.
Which of the following is an adaptation that allows the heart to have oxygen readily available?
A. Cardiac cells have fewer mitochondria. B. Cardiac cells are rich in glycogen. C. Cardiac cells use a variety of fuels as energy sources. D. Cardiac cells are rich in myoglobin.
Which is NOT true about fatty acid synthesis?
A. takes place in the cytosol of cells B. results in molecules with an even number of carbon atoms only C. requires more energy than is produced by the catabolism of the same fatty acid D. begins with a molecule of acetyl coenzyme A E. The enzymes that catalyze it are in the same location as those that mediate fatty acid catabolism.
It is possible to consciously control the rate and depth of respiration
Indicate whether the statement is true or false.