A joint characterized by interdigitation and short collagen fibers is a:
a. suture
b. syndesmosis
c. symphysis
d. gomphosis
Answer: a. suture
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Which type of vessel consists of a single layer of endothelium?
A) None of the listed responses is correct. B) arteries C) veins D) capillaries
The vasomotor center which regulates blood vessel diameter is located in the brain stem.
a. true b. false
Why are pregnant Rh- women given an injection of Rh immune globulin?
A. Antibodies in the injection bind fetal RBC antigens so they cannot stimulate her immune system to produce anti-D antibodies. B. Antibodies in the injection bind fetal RBC antigens so they cannot stimulate her immune system to produce anti-B antibodies. C. Antibodies in the injection bind fetal RBC antigens so they cannot stimulate her immune system to produce anti-A and anti-B antibodies. D. Antibodies in the injection bind fetal RBC antigens so they cannot stimulate her immune system to produce anti-A antibodies. E. Antibodies in the injection bind fetal RBC antigens so they cannot stimulate her immune system to produce anti-O antibodies.
Which of the following is NOT true of the latch state of smooth muscle contraction?
A. Myosin phosphatase removes the phosphate group from myosin. B. It explains why smooth muscle can sustain tension for long periods of time. C. It occurs when the phosphate is removed while the cross-bridges are attached to actin. D. It occurs when the phosphate is removed while the cross-bridges are not attached to actin. E. It allows contraction without a large energy expenditure.