Multiple Choice
The alternating contraction and relaxation of opposing layers of smooth muscle is referred to as __________.
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Steps of Muscle Contraction
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Acetylcholinesterase __________.
A
activates acetylcholine
B
helps acetylcholine bind to its receptor
C
breaks down acetylcholine
D
is another name for acetylcholine
Verified step by step guidance1
Understand the role of acetylcholinesterase in the nervous system. Acetylcholinesterase is an enzyme that is crucial for the proper functioning of cholinergic synapses.
Recognize that acetylcholine is a neurotransmitter involved in transmitting signals across synapses, particularly in the neuromuscular junction.
Learn that acetylcholinesterase breaks down acetylcholine in the synaptic cleft. This process is essential for terminating the signal transmission and preventing continuous stimulation of the post-synaptic neuron or muscle cell.
Consider the options given: 'activates acetylcholine', 'helps acetylcholine bind to its receptor', 'breaks down acetylcholine', and 'is another name for acetylcholine'. Only one of these accurately describes the function of acetylcholinesterase.
Conclude that the correct answer is 'breaks down acetylcholine', as this is the primary function of acetylcholinesterase in the synaptic cleft.
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