A nerve impulse travels fastest along ________ axons of ________ diameter.
A. unmyelinated; large
B. myelinated; small
C. unmyelinated; small
D. myelinated; large
E. None of the choices; axon diameter does not affect impulse conduction.
Answer: D
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At rest, the tropomyosin molecule is held in place by
A) actin molecules. B) myosin molecules. C) troponin molecules. D) ATP molecules. E) calcium ions.
Which of the following statements about the duodenum is not true?
A. It is longer than the jejunum. B. It receives bile from the liver. C. It receives chyme from the stomach. D. It contains a brush border. E. It receives secretions from the pancreas.
Thin yellowish milk secretion is a sign of ________________________________________ mastitis
Fill in the blank(s) with correct word