Binding of neurotransmitters to the post synaptic neuron opens some channels and allows ……..ions to diffuse the post synaptic membrane.
a) Na+
b) K+
c) Ca2+
d) NH4+
How rapidly neurotransmitters are clear from synaptic cleft, terminating their effect on postsynaptic cells?
a) actively transported back pre synaptic cells
b) they may be transported into neuroglia to be metabolize as fuel
c) removed from synaptic cleft by enzymes that catalyze the hydrolysis of neurotransmitter
d) all of these
Explanation A postsynaptic neuron in a neuron (nerve cell) that receives the neurotransmitter after it has crossed the synapse and may experience an action potential if the neurotransmitter is strong enough.
The neurotransmitter acetylcholine is hydrolyzed by……..
a) monoamine oxidase
b) oxidoreductase
c) acetylcholinestrase
d) aminoacyltransferase
Explanation Acetylcholinesterase (AChE) is a cholinergic enzyme primarily found at postsynaptic neuromuscular junctions, especially in muscles and nerves.
The neurotransmitter adrenalin is hydrolyzed by the enzyme……..
a) monoamine oxidase
b) oxidoreductase
c) acetylcholinestrase
d) aminoacyltransferase
Explanation An enzyme called monoamine oxidase is involved in removing the neurotransmitters norepinephrine, serotonin and dopamine from the brain.
Which of the following is called chemical messenger of nervous system?
a) neurotransmitter
b) neuroamine
c) neuroprotein
d) carbohydrates and lipids
Which hormone is hydrolyzed by monoamineoxidases?
a) acetylcholine
b) dopamine
c) epinephrine
d) vasopressin
