Elastic recoil refers to the tendency of the chest wall to expand
Indicate whether the statement is true or false
F
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The myocardium directly receives its blood supply from the __________ arteries.
Fill in the blank(s) with the appropriate word(s).
Calcium is important to homeostasis because
a. it plays a role in the absorption of vitamin D from the digestive tract b. it maintains the proper excitability of nerves and muscles c. it stimulates osteoblasts to lay down bone d. of both a and b e. of both b and c
Which of the following emphasizes mechanism over purpose?
a. a person breathes to obtain oxygen. b. a person sweats to cool off. c. a person's stomach secretes digestive juices because it is stimulated by the nervous system. d. a person's heart beats to pump blood. e. a person's kidneys produce urine to eliminate wastes from the body.
A drug known as a beta-blocker should primarily affect:
A) bronchodilation. B) dilation of the pupils. C) heart rate. D) sweating.