The tectum of the midbrain contains the
A) substantia nigra.
B) red nuclei.
C) superior and inferior colliculi.
D) cerebral peduncles.
E) basal ganglia.
Answer: C
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The cranial cavity houses the
A. eyeball.?B. ear canals.?C. brain.?D. spinal cord.?E. nasal structures.
The tough, outer layer of connective tissue that covers most of the eyeball is the
a. sclera. b. eyelid. c. eye socket. d. choroid. e. cornea.
When central chemoreceptors detect a drop in the pH of the cerebrospinal fluid,
A. the vagus and phrenic nerves stimulate decreased production of the catalyst carbonic anhydrase. B. pontine respiratory centers trigger a decrease in rate and depth of breathing. C. medullary respiratory centers trigger a decrease in rate and depth of breathing. D. medullary respiratory centers trigger an increase in rate and depth of breathing.
Hernias are more common in men because when the testicals descend through the inguinial canal, the opening of the canal does not close completely.
a. true b. false