Rigor mortis affects skeletal muscles a few hours after death, due to
A. a decrease in ATP and increased permeability to calcium.
B. an increase in ATP and decreased permeability to calcium.
C. impulses that produce sustained contractions.
D. an increase in ATP.
Answer: A
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From superficial to deep, order the transversus abdominis, external oblique and internal oblique muscles. Describe the orientation of the muscle fibers for each of these as well as for the rectus abdominis muscles
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The upper limb and its girdle are attached rather loosely to the rest of the body. This arrangement
A. results in a disjointed appearance. B. limits fine coordination of the hands. C. allows a wide range of movements. D. restricts the amount of weight the upper limb can support. E. results in a limited range of motion.
The ion(s) or molecule(s) labeled B is (are)
A) CO2.
B) H2O.
C) O2.
D) H+.
E) 2H.
The cerebral arterial circle is an anastomosis of arteries around the
A. pons. B. frontal lobes. C. sella turcica. D. medulla oblongata. E. dural venous sinuses.