Unlike other blood cells, certain types of ________ are not confined to the bloodstream, but instead can migrate out into the fluid surrounding cells.
A. leukocytes
B. platelets
C. thrombocytes
D. erythrocytes
Answer: A
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Due to the lack of moderate stress on the skeleton, a bedridden person is at risk of
A. rheumatoid arthritis and muscular degeneration. B. osteoarthritis and tendon damage. C. osteoporosis and muscle degeneration. D. cartilage growth and a sprain. E. anemia and cartilage degradation.
Africanized bees ____ than European
honeybees. a. make less honey b. respond more quickly to perceived threats c. are more aggressive stingers d. are more likely to abandon their colony after being disturbed e. do all of these
The cortical reaction prevents multiple sperm from contributing their chromosomes to the egg.
Answer the following statement true (T) or false (F)
Proper functioning of the human kidney requires considerable active transport of sodium in the kidney tubules. If these active transport mechanisms were to stop completely, how would urine production be affected?
A. A greater-than-normal volume of urine equal in concentration to the blood (isotonic) would be produced. B. A greater-than-normal volume of urine that was more concentrated than the blood (hypertonic) would be produced. C. A lower-than-normal volume of urine which was less concentrated than the blood (hypotonic) would be produced. D. A lower-than-normal volume of urine which was more concentrated than the blood (hypertonic) would be produced. E. No urine would be produced.