Which of the following marks the boundaries of a sarcomere?
A. A bands
B. H bands
C. M lines
D. I bands
E. Z discs
Answer: E
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Circular folds and intestinal villi
A) increase the surface area of the mucosa of the small intestine. B) carry products of digestion that will not pass through the walls of blood capillaries. C) produce new cells for the mucosa of the small intestine. D) secrete digestive enzymes. E) produce hormones.
What characteristics do tendons and ligaments share with muscles?
A. extensibility B. elasticity C. contractility D. both A and B E. all of the above
When vasodilation of the blood vessels in the skin occurs, then
a. the skin temperature becomes warmer than the core temperature b. the insulative capacity of the skin is increased c. heat will be lost from the body if the air temperature is cooler than skin temperature d. b and c are true e. all of the above are true
What element is found in all living matter?
a. nitrogen b. carbon c. lithium d. oxygen