Which muscles help us in the initial breakdown of food?
A. Extrinsic eye muscles
B. Muscles of mastication
C. Muscles that move the tongue
D. Muscles of facial expression
E. Muscles of the pharynx
B
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Which of the following is correct about the autonomic nervous system (ANS)?
A. The ANS is part of both the CNS and the PNS. B. ANS motor neurons innervate cardiac muscle fibers, smooth muscle fibers, and glands. C. ANS functions are involuntary. D. ANS motor pathways always include two neurons. E. All of the choices are correct.
The myogenic mechanism for autoregulation of vascular smooth muscle tone:
A. requires the release of nitric oxide from endothelial cells B. involves the release of norepinephrine from sympathetic nerve endings C. responds to changes in vessel wall transmural pressure D. depends upon changes in flow through the vessel E. arises from changes in shear stress in the vessel wall
Axons of the lower motor neurons of the anterior corticospinal tracts innervate
A. muscles of the lower digestive tract. B. skeletal muscles that control skilled movements in the limbs. C. muscles of the respiratory system. D. skeletal muscles of the upper back and neck. E. axial skeletal muscle.
The three major processes involved in urine formation are filtration, reabsorption, and excretion
Indicate whether the statement is true or false