Which digestive organ creates chyme?
A- gallbladder
B- stomach
C- pancreas
D- liver
Ans: B- stomach
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Smoking exposes the nervous system to nicotine contained in cigarettes. Smokers experience a "buzz" from the nicotine, as it activates nicotinic receptors of ________ neurons.
A. muscarinic B. cholinergic C. adrenergic D. multipolar
Stimulation of the aortic baroreceptors reflexively results in
A) stimulation of the cardioaccelerator center in the brain. B) increased sympathetic stimulation of the heart. C) increased activity by the parasympathetic nervous system. D) stimulation of the vasoconstrictive center. E) increased heart rate.
A Ca2+-binding protein in smooth muscle is calmodulin
Indicate whether the statement is true or false.
When acetylcholine binds to autonomic muscarinic receptors, ________.
A. heart rate increases B. voluntary movements occur C. intestinal motility decreases D. intestinal motility stops E. intestinal motility increases