Which of the following is not a feature of the sympathetic division of the ANS?
A. It has an extensive neural divergence and a relative widespread effect.
B. It has long preganglionic fibers.
C. Its ganglia are adjacent to the spinal column.
D. It has long postganglionic fibers.
E. It originates in the thoracolumbar region of the spinal cord.
Answer: B
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The ________ is a connective tissue sheet that separates the cerebrum from the cerebellum.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements concerning the length-tension relationship of skeletal muscle is incorrect?
a. when a muscle is maximally stretched, it can develop the most tension upon contraction because the thin filaments can slide in a maximal distance. b. maximum tension can be developed if the muscle is at its lowest at the onset of contraction. c. in the body, the relaxed length of muscle is at its optimal length. d. when the initial length of muscle prior to contraction becomes very short, tension is decreased during contraction because of thin filament overlap, because the thick filaments are compressed against the Z lines, and because not as much Ca2+ is released during excitation-contraction coupling. e. the tension that can be achieved during a tetanic contraction is less when a muscle is shorter or longer than its optimal length at the onset of contraction.
The ________ is a U-shaped bone that sits above the larynx yet does not articulate with any other bone.
A. zygomatic bone B. maxilla C. hyoid bone D. mandible
The external marking of the boundary between the two testes is the
A) spermatic cord. B) raphe. C) tunica albuginea. D) acrosome. E) dartos muscle.