9.
What is FALSE about somatic division?
Select one:
a. The somatic division is made of somatic motor neurons thattarget only the skeletal muscle cells or muscle fibers.
b. A motor unit is one somatic motor neuron and all of themuscle fibers it innervates.
c. The somatic motor neuron secrets acetylcholine (ACh) from theaxon terminal.
d. If ACh binds to the nicotinic receptor at the motor end plateof the muscle fiber, the responds is excitatory.
e. If ACh binds to acetylcholine esterase at the motor end plateof the muscle fiber, the responds is inhibitory becauseacetylcholine esterase will break up ACh into acetyl andcholine.
f. All of the above
g. None of the above
10.
The synapse between somatic motor neuron and muscle fiber is atthe neuromuscular junction that is composed of the axon terminal ofthe somatic motor neuron and the motor-end-plate of the musclefiber.
Select one:
a. True
b. False
11.
What is TRUE about the autonomic division? There may be morethan one answer.
Select one or more:
a. The autonomic division consists of the parasympathetic andsympathetic divisions that target the cardiac cells, smooth musclecells, and glands.
b. The parasympathetic and sympathetic divisions are made ofpre-ganglionic neuron that synapses with the post-ganglionic neuronat the neuromuscular junction.
c. The pre-ganglionic neuron of both parasympathetic andsympathetic would secrete acetylcholine at the axon terminal and itwould bind to the nicotinic receptor at the dendrites/cell body ofthe post-ganglionic neuron.
d. The post-ganglionic neuron of the parasympathetic wouldsecrete acetylcholine to the target cells. At the target cells, theacetylcholine would bind to the nicotinic receptor.
e. The post-ganglionic neuron of the sympathetic would secretenorepinephrine and epinephrine. At the target cells, thenorepinephrine and epinephrine would bind to the adrenergicreceptors (alpha 1, alpha 2, beta 1, beta 2, or beta 3).
12.
What is the CORRECT statement about the parasympatheticdivision? There may be more than one answer.
Select one or more:
a. Only acetylcholine is secreted from the post-ganglionicneuron to the target cells.
b. Nicotinic receptors are at the heart, GI tract, andbronchioles.
c. In the gastrointestinal tract (GI tract), parasympatheticneurons will cause the smooth muscle cells to relax, causing thewalls of the intestines to dilate.
d. In the blood vessels, parasympathetic neurons will cause thesmooth muscle cells to contract, causing the blood vessels tovasoconstrict.
e. In the bronchioles, parasympathetic neurons will causebronchoconstriction.
