Sketch a graph of the length-tension relationship in a contracting skeletal muscle, and explain its shape in terms of events in the sarcomere.
What will be an ideal response?
Sketch should resemble Figure 12.16 in the chapter. At optimal length, the extent of overlap between thick and thin filaments at onset of contraction is the greatest. Thus, the number of actin and myosin crossbridges is the greatest. On either side of optimum, the extent of interaction between actin and myosin is reduced thereby decreasing the number of crossbridges that can form, which reduces the force of contraction of skeletal muscle cells.
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Susan recently had bariatric surgery which removed 85% of her stomach cells. Which of the following would you expect to decrease immediately after surgery?A) HungerB) GhrelinC) LeptinD) Thyroid hormoneE) Basal metabolic rate
What will be an ideal response?
The hormone that stimulates growth of ovarian follicles in women and production of sperm in men is __________ stimulating hormone.
Fill in the blank(s) with the appropriate word(s).
Symptoms of the fight-or-flight reaction include all of these EXCEPT
A) increased blood pressure. B) pounding heart. C) pupillary dilation. D) hunger. E) sweating palms.
The origin of the term "anatomy" is related to
A. the name of the first anatomist. B. the Greek word for "function." C. the Greek word for "cutting up." D. the function of internal organs.