Question

question 6
1 pts
at the neuromuscular junction, ___ is released into the synaptic cleft, stimulating the skeletal muscles.
nicotine
ach
potassium
sodium

Explanation:

To determine the correct answer, we recall the function of the neuromuscular junction. At the neuromuscular junction, the neurotransmitter acetylcholine (Ach) is released from the motor neuron into the synaptic cleft to stimulate skeletal muscle contraction. Nicotine is a drug that can interact with receptors but is not the primary neurotransmitter here. Potassium and sodium are ions involved in action potentials but not the neurotransmitter released into the synaptic cleft for muscle stimulation. So the correct answer should be Ach.

Answer:

B. Ach (assuming the option for Ach is labeled as B; if the original option labeling was different, adjust accordingly. Based on the given options, the correct one is the option with "Ach".)