The figure illustrates changes in the membrane potential during an action potential. What does "E" represent?
A. Local potential
B. Depolarization
C. Repolarization
D. Afterpotential
E. Threshold
Answer: D
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A) internal carotid artery. B) vertebral artery. C) external carotid artery. D) vertebral vein. E) cephalic vein.
Salivary amylase is secreted by the
A) sublingual salivary gland. B) parotid salivary gland. C) submandibular salivary gland. D) frenulum. E) papillae
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A) intrinsic. B) extrinsic. C) automaticity. D) self-replicating. E) self-starting.
The genetic information is coded in DNA by the ________
A) sequence of the nucleotides B) three-dimensional structure of the double helix C) arrangement of the histones D) regular alteration of sugar and phosphate molecules