Sperm develop from stem cells called
A) spermatogonia.
B) primary spermatocytes.
C) secondary spermatocytes.
D) spermatids.
E) spermatozoa.
Answer: A
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Of the following arteries, the one that is an elastic artery is
A) the left subclavian artery. B) the external carotid artery. C) the brachial artery. D) the femoral artery. E) none of the above.
The specialized membranes that surround the spinal cord are termed the
A) cranial meninges. B) cranial mater. C) spinal meninges. D) spinal mater. E) epidural membranes.
What effect would lesions in the cervical ganglia and upper spinal cord that interrupt sympathetic innervation of the head have?
A. Increased blood supply to the digestive tract B. Decreased rate and force of the heart beat C. Constriction of the pupil and decreased facial perspiration D. Decreased upper limb perspiration and inability to produce "goose bumps" E. Decreased production of epinephrine and norepinephrine
In the brain, the ________ is the integration and command center for autonomic functions.
A. cerebral cortex B. brainstem C. hypothalamus D. medulla E. spinal cord