Why is blockage of a coronary artery such a serious threat to cardiac muscle?
A. Cardiomyocytes rely on a constant supply of calcium.
B. Cardiomyocytes have abundant mitochondria and rely on a constant supply of oxygen.
C. The myosin of cardiomyocytes is unique and requires abundant nutrients and oxygen.
D. Cardiomyocytes have weak sarcolemmas that easily rupture.
E. Cardiomyocytes are fast-twitch fibers.
Answer: B
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A. passage of chyme into the duodenum. B. mucus secretion. C. passage of a bolus into the stomach. D. peristalsis. E. passage of bile and pancreatic juice into the duodenum.
Phasic receptors are rapidly adapting receptors
Indicate whether the statement is true or false
Inorganic chemists study substances ________ carbon, while organic chemists study substances ________ carbon.
A. lacking; containing B. containing more than 1 mole of; with less than a mole of C. containing; lacking
The glomerular capsule and the glomerulus make up the
A) renal pyramid. B) nephron loop. C) renal corpuscle. D) renal papilla. E) collecting tubule system.