What type of movement is occurring in the angle between the forearm and humorous decreases?
a. Flexion.
b. Extension.
c. Abduction.
d. Adduction.
Answer: a. Flexion.
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In ________ cells, invaginations of the external plasma membrane and proteins found there allow us to detect different colors of light.
A. cone B. pigment epithelial C. rod D. ganglion E. bipolar
The cardiac, pulmonary, and esophageal plexuses are formed by fibers of which nerve?
A. Vagus B. Glossopharyngeal C. Cardiac sympathetic D. Phrenic E. Hypoglossal
Vasopressin secretion
a. induces the kidneys to produce a small volume of concentrated urine. b. is stimulated when the body fluids are hypertonic. c. is inhibited when the arterial blood pressure is dangerously low. d. both (a) and (b) above. e. all of these answers.
The small size and biconcave shape of this cell gives it flexibility and allows its easy passage through small channels. It is a ________
A) sperm cell B) smooth muscle cell C) red blood cell D) simple squamous epithelial cell