Question

what neurotransmitter was used at the neuromuscular junction to activate skeletal muscles?
adrenaline
sodium
glutamate
potassium
noradrenaline
acetylcholine

Explanation:

To determine the neurotransmitter at the neuromuscular junction for skeletal muscle activation, we analyze each option:

• Adrenaline (epinephrine) acts in the sympathetic nervous system, not at the neuromuscular junction.
• Sodium and Potassium are ions involved in action potentials, not neurotransmitters.
• Glutamate is a major excitatory neurotransmitter in the central nervous system, not at the neuromuscular junction.
• Noradrenaline (norepinephrine) is involved in the sympathetic nervous system, not at the neuromuscular junction.
• Acetylcholine is the neurotransmitter released by motor neurons at the neuromuscular junction to activate skeletal muscles.

Answer:

acetylcholine (the option with "acetylcholine" as the text)