At the bifurcation of the aorta in the pelvic region, the ________ artery arises to supply the sacrum and coccyx.
A. lumbar
B. subclavian
C. posterior intercostal
D. femoral
E. median sacral
Answer: E
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Developmentally, the vertebrae and ribs are formed by portions called ________ that separate from the somites, surround the neural tube, and become cartilaginous.
Fill in the blank(s) with the appropriate word(s).
The hypophyseal portal system connects the _________ with the _________.
A. anterior pituitary; hypothalamus B. posterior pituitary; hypothalamus C. anterior pituitary; posterior pituitary D. hypothalamus; thyroid E. pituitary glands; thyroid
Calcium is permanently embedded in the rigid structure of bone.
a. true b. false
Which of the following events occurs on the postsynaptic membrane?
A. Neurotransmitter combines with a receptor molecule B. Release of Ca2+ C. Rapid degradation of acetylcholine D. Release of neurotransmitter E. Acetylcholine production