Question
29. What is the desired effect when acetylcholine crosses the synapse of a myoneural junction? Acetylcholine attaches to receptors on the bone. B. Acetylcholine attaches to receptors on the next neuron Acetylcholine attaches to receptors on the sarcolemma. D. Nothing, serotonin is the neurotransmitter that crosses a myoneural junction.
Answer
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Wilfred
Professional · Tutor for 6 years
Answer
C. Acetylcholine attaches to receptors on the sarcolemma.
Explanation
## Step 1: Understand the question. The question is asking for the desired effect when acetylcholine, a neurotransmitter, crosses the synapse of a myoneural junction. ## Step 2: Recall the role of acetylcholine. Acetylcholine is a neurotransmitter that transmits signals across a chemical synapse, such as at a myoneural junction. It is released from the motor neuron and binds to its receptor on the muscle fiber, leading to the conduction of an action potential or a neural impulse along the muscle fiber.## Step 3: Analyze the options. Acetylcholine does not attach to receptors on the bone (Option A) or the next neuron (Option B). Serotonin is another neurotransmitter, but it is not the one that crosses a myoneural junction (Option D). ## Step 4: The correct answer is that acetylcholine attaches to receptors on the sarcolemma (Option C). The sarcolemma is the membrane of a muscle fiber (cell). When acetylcholine binds to its receptors on the sarcolemma, it triggers a series of events that lead to muscle contraction.