Question

The muscle relaxes if no new nerve signal arrives. However the neurotransmitter from the previous stimulation is still present in the synapse. The activity of ________ helps to remove this neurotransmitter. a. myosin b. action potential c. tropomyosin d. acetylcholinesterase

Short answer

a. Myosin b. Action potential c. Tropomyosin d. Acetylcholinesterase Answer: d. Acetylcholinesterase

Step-by-step solution

Read the question carefully

Understand the exercise and focus on the main point which is the removal of neurotransmitter from the synapse.

Analyze the given options

Go through the options one by one and understand their functions in the muscle relaxation process. a. Myosin: A protein that plays a key role in muscle contraction b. Action potential: Electrical impulse that travels along a nerve cell membrane c. Tropomyosin: A protein that helps regulate muscle contraction d. Acetylcholinesterase: An enzyme that breaks down the neurotransmitter acetylcholine

Choose the correct answer

Based on the understanding of the functions of the given options, choose the option which helps remove the neurotransmitter from the synapse. The correct answer is: d. Acetylcholinesterase, since it helps break down the neurotransmitter acetylcholine, clearing it from the synapse and allowing the muscle to relax when no new nerve signal arrives.