Why is blockage of a coronary artery such a serious threat to cardiac muscle?
A. Cardiocytes have weak sarcolemmas that easily rupture.
B. Cardiocytes have abundant mitochondria and rely on a constant supply of oxygen.
C. Cardiocytes rely on a constant supply of calcium.
D. The myosin of cardiocytes is unique and requires abundant nutrients and oxygen.
E. Cardiocytes are fast-twitch fibers.
B. Cardiocytes have abundant mitochondria and rely on a constant supply of oxygen.
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What will be an ideal response?
_______ forms nucleotides
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All of the following are derived from epithelial columns except
A) hair roots. B) hair follicles. C) nails. D) sebaceous glands. E) sweat glands.