The pelvic girdle and lower limb are part of the
A. axial skeleton.
B. appendicular skeleton.
B
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Myocardial cells can generate action potentials spontaneously because they have
A) L-type Ca2+ channels. B) permanently open channels for Na+ and K+. C) a net influx of Na+. D) prolonged Ca2+ influx. E) unstable ion channels.
Both the cardiac plexus and the ________ plexus consist of postganglionic sympathetic axons from the thoracic sympathetic trunk ganglia and preganglionic axons from the vagus nerve.
Fill in the blank(s) with the appropriate word(s).
Which of the following is NOT true of muscular atrophy?
A. It is irreversible. B. It can be caused by disuse. C. It can be caused by denervation. D. Transcutaneous stimulation can help prevent it. E. Muscle fibers are replaced by connective tissue.
What is the function of peroxisomes?
A. To produce ATP B. To synthesize lipids C. To package vesicles D. To detoxify various drugs in the liver E. To break down proteins and phospholipids