Which of the following is NOT a part of the swallowing reflex?
A. Respiration is inhibited.
B. The glottis closes.
C. The upper esophageal sphincter relaxes.
D. The lower esophageal sphincter relaxes.
E. The pyloric sphincter relaxes.
E
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Hunting behaviors of animals are learned through ______________________________
Fill in the blank(s) with correct word
Which one of these statements is incorrect?
A. A red blood cell placed in an isotonic solution would stay the same. B. A cell placed in an hypertonic solution would undergo crenation. C. A cell placed in an hypotonic solution would swell and perhaps burst. D. A cell placed in a hypotonic solution would undergo crenation.
A certain drug decreases heart rate by producing hyperpolarization in the pacemaker cells of the heart. This drug probably binds to
A) muscarinic receptors. B) alpha adrenergic receptors. C) beta receptors. D) nicotinic receptors.
What produces "goose bumps"?
A. Dilation of cutaneous blood vessels B. Secretion of sweat C. Contraction of the arrector pili muscle D. Flow of sebum onto the skin