Which fibers dominate many of the back and calf muscles that contract almost continually to maintain posture?
A. Slow-twitch
B. Intermediate
C. Fast-twitch
Answer: A
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The membrane covering the axon is called the ________
A) neurolemma B) myelin sheath C) axolemma D) white matter
When calcium levels in the blood are low, the ________ produce _______ which stimulates the breakdown of bone, releasing calcium.
A. parathyroid glands; parathyroid hormone B. parathyroid glands; calcitonin C. adrenal glands; calcitonin D. adrenal glands; aldosterone
The region inferior to the right lumbar region is the right inguinal region, or the ____________ ____________ region.?
Fill in the blank(s) with correct word
Which of the following organs is the main site of aldosterone secretion?
A. kidneys B. adrenal glands C. systemic and pulmonary blood vessels D. liver E. the atria of the heart