During metaphase of mitosis, chromosomes first condense and become visible when stained and viewed under a microscope.
Answer the following statement true (T) or false (F)
False
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The dicrotic notch on the aortic pressure wave is due to a disturbance caused by the closure of the ______ valve
Fill in the blank(s) with correct word
Why does the regulation of body temperature represent a negative feedback loop?
A) An increase in body temperature triggers skeletal muscle contraction B) An increase in body temperature triggers sweating C) An increase in body temperature triggers the constriction of blood vessels D) A decrease in body temperature triggers vasodilation of blood vessels.
If one nerve stimulus arrives at a muscle fiber so soon that the fiber does NOT relax at all from the previous twitch, the most likely result will be ________.
A. fatigue B. complete tetanus C. wave summation D. spasm E. incomplete tetanus
Which of the following describes the relaxation phase?
A) The sarcomeres are decreasing in length, and the force generated increases. B) The sarcomeres are increasing in length, and the force generated decreases. C) The sarcomeres are decreasing in length, and the force generated decreases. D) The sarcomeres are increasing in length, and the force generated increases.