Question

Excitatory neurotransmitter involved in transmission of impulse at neuromuscular junction is

• A. Epinephrine
• B. Serotonin
• C. Acetylcholine
• D. Glycine

Answer 1

The correct option is C Acetylcholine

• Muscle contraction is initiated by a signal sent by the central nervous system (CNS) via a motor neuron.
  
• Neuromuscular junction refers to the junction between a motor neuron and the sarcolemma of the muscle fibre.
  
• A neural signal reaching this junction releases a neurotransmitter (Acetylcholine) which stimulates the muscle fibre by generating an action potential in the sarcolemma.
  
• Hence excitatory neurotransmitter involved in the transmission of impulse at the neuromuscular junction is acetylcholine.
• So, the correct answer is 'Acetylcholine'.