Organs that recondition the blood
a. receive disproportionately large percentages of the cardiac output.
b. can withstand temporary reductions in blood flow much better than can organs that do not recondition the blood.
c. must receive a constant blood supply in order to maintain homeostasis.
d. both (a) and (b) above.
e. both (a) and (c) above.
D
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Identify the tissue in the image, which is comprised of short, spindle-shaped cells that are found in the walls of blood vessels and in digestive, respiratory, urinary, and reproductive organs.
A) fibrocartilage B) dense regular connective tissue C) smooth muscle tissue D) reticular tissue E) cardiac muscle tissue
Which of the following is not a means of increasing or conserving heat production?
a. shivering. b. skin vasodilation. c. nonshivering thermogenesis. d. increased muscle tone. e. increased exercise.
Which of the following descriptions does NOT describe the ANS?
A) a system of motor neurons that innervated smooth muscle, cardiac muscle, and glands B) a system of motor neurons that innervate all muscle cells C) involuntary nervous system D) general visceral motor system
Why is the temporomandibular joint considered to be a second-class lever?
A. It has a mechanical advantage of 1.0 or less. B. The force is in the middle. C. The effort arm is longer than the resistance arm. D. The fulcrum is in the middle. E. The resistance is in the middle.