9) increase parasympathetic stimulation will produce an a)increase of sweating b
ID: 3524515 • Letter: 9
Question
9) increase parasympathetic stimulation will produce an
a)increase of sweating b)increase of epinephrine in the blood c)increase of digestive processes d)increase in heart rate
10)inhibition of acetylcholinesterase by poisoning blocks neurotransmission at the neuromuscular junction because
a)ach is not inactivated, hense it will accumulate in the neuromuscular cleft (gap)
b)ach is no longer released by the presynaptic membrane
c)ACH is blocked to bind to its receptor site on the end plate membrane
d)ACh synthesis in the presynaptic axon terminal is blocked
11) which of the following occur when an excitatory postsynaptic potential ((ESSP) is being generated on the post synaptic membrane?
a)sodium channels will open first, then close as potassium channels open
b)voltage gated sodium channels will open
c)specific potassium gates will open
d)A single types of channel will open, permitting simultaneous flow of sodium and potassium
Explanation / Answer
9.c) Parasympathetic stimulation causes what is simplified as "rest and digest" or "feed and breed" increase, which means parasympathetic stimulation will causes increase in the digestive system and lacrimation and salivation, On the heart , it has opposite effects as compared to the sympathetic stimulation, which is decreasing the heart rate.
10)b) Ach degradation is blocke dby poisoning , so there is accumulation of Ach at the presynaptic membrane .
11.d) when the EPSP is generated at the post synaptic membrane , the neurotransmitter will bind to the chemical gated channels, which allows simultaneous flow of sodium and potassium ions.
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