Movement of food through the digestive tract results from the action of ________ muscle.
A. smooth
B. skeletal
C. striated
D. cardiac
E. voluntary
Answer: A
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Damage to the ventral roots of the first five thoracic spinal nerves on the right side of the body would interfere with the ability to
A) dilate the right pupil. B) constrict the right pupil. C) dilate the left pupil. D) constrict the left pupil. E) smile and frown.
A ________ section through the umbilicus divides the human body into equal left and right portions.
A) cross-sectional B) parasagittal C) transverse D) coronal E) midsagittal
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.
When calcium ion binds to troponin,
A) tropomyosin rolls away from the active site. B) active sites on the myosin are exposed. C) actin heads will bind to myosin. D) muscle relaxation occurs. E) myosin shortens.