What will happen to the COM of a human body if the arms are raised up overhead?
A. it will move up
B. it will move down
C. it will not change
D. need more information to predict
A. it will move up
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Gray matter is present in a spinal cord in three horns. Surgically cutting across the horns would destroy which type of material?
A. Myelinated axons B. Cell bodies C. Potassium channels D. Depolarizing axons
Antigen presentation involves the display of an antigen
A. inside the cytoplasm of a B-lymphocyte. B. on the surface of a cell so that a B-lymphocyte can be exposed to it. C. inside the cytoplasm of a T-lymphocyte. D. on the surface of a cell so that a T-lymphocyte can be exposed to it.
Answer the following statements true (T) or false (F)
1. Dynamic loading during gymnastics has been show to affect bone size and strength more than muscle mass. 2. The effects of several months intervention treatment with whole body vibration appear to include improved bone mineral density. 3. The link between cessation of menses and osteoporosis is estrogen deficiency. 4. In practical terms, a fast childhood game of hopscotch favors bone building over a very slow one. 5. Long distance runners have a much higher prevalence of secondary amenorrhea than the general population.
Generally, negatively charged plasma proteins are
A. repelled by the negative charge of the filtration membrane. B. attracted by the positive charge of the filtration membrane. C. engulfed by endocytosis and reabsorbed at the filtration membrane. D. moved across the filtration membrane by active transport pumps.