Pancreatic acinar cells are specialized for secreting digestive enzymes ultimately into the small intestine. This specialization reflects an elaboration of which of the following basic cell functions?
a. obtaining oxygen and nutrients
b. eliminating wastes
c. synthesizing components needed for the cell's survival
d. controlling movement of materials between the cell and its environment
e. reproducing
d
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Why is it necessary for the bones of the pelvic girdle to be more massive than the bones of the pectoral girdle?
What will be an ideal response?
The different tracts within indirect motor pathways are grouped according to their primary functions. The medial pathway regulates
A. and controls precise, discrete movements and tone in flexor muscles of the limbs. B. smooth muscle contraction in the viscera. C. muscle tone and gross movements of the muscles of the head, neck, proximal limb, and trunk. D. respiratory rhythm and CO2 levels. E. heartbeat and controls blood pressure.
When are heart attacks more likely to occur?
Which of the following effects of exercise elevate the body temperature?
A) elevated metabolism from the oxygen debt B) an increased rate of chemical reactions C) skeletal muscle contractions D) all of the above