What is the purpose of segmental contractions of the small intestine?
A. Propelling the chyme forward
B. Stretching the intestinal wall
C. Moving intestinal contents into the colon
D. Mixing of intestinal contents
Answer: D
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Which term means lying on the back, face upward?
A. Supine B. Prone C. Distal D. Cephalad E. Dorsal
Endocrine responses occur more slowly and last longer than neural responses
Indicate whether the statement is true or false
Why does rigor mortis result in muscular rigidity after death?
A. The enzyme that hydrolyzes ATP is no longer being produced; therefore, the myosin heads will not receive the actin filament. B. The ATP necessary to bind to the myosin head and release the cross bridge is no longer present. C. ATP production is no longer possible; therefore, cross bridges cannot be formed. D. A buildup of intracellular calcium keeps the troponin molecule free of the active site on actin.
The type of voltage-gated channel that possesses an inactivation gate that temporarily closes after the channel is active is the
A. voltage-gated potassium channel. B. voltage-gated chloride channel. C. voltage-gated sodium channel. D. voltage-gated calcium channel.