All of the following are true of fiber tracts in the spinal cord except
A) the tracts are randomly located with respect to the type of information carried.
B) all axons within a tract relay information in the same direction.
C) each tract carries sensory or motor information, but not both.
D) axons of a single tract are relatively uniform in diameter, myelination, and conduction speed.
E) None of the answers are correct.
A) the tracts are randomly located with respect to the type of information carried.
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As blood is pumped into the arterial trunks past the semilunar valves, it
A. pushes against the cusps, forcing the valves open. B. fills the cusps, causing them to expand and open up for the flow of blood. C. fills the cusps, causing them to expand and block the backflow of blood. D. pushes against the cusps, forcing the valves closed. E. None of these answers is correct.
The surface of the teeth of the lower jaw nearest the tongue is called the ________ surface.
A) buccal B) palatal C) lingual D) mesial E) occlusal
What happens to the diaphragm when it contracts?
A. It becomes flatter and aids in expiration. B. It becomes flatter and aids in inspiration. C. It becomes dome-shaped and aids in inspiration. D. It becomes dome-shaped and aids in expiration.
In a case where both parents were carriers of an autosomal recessive disorder, what would be the probability that one of their children would have that disorder?
A. 50% B. 75% C. 100% D. 25% E. 0%