What is the role of acetylcholine in muscle cell contraction? A. it is a neurotransmitter B. it binds to troponin causing it to change shape C. it supplies the energy for contraction D. it engages with the binding site on actin
Option A. The junction between a motor neuron and the sarcolemma of the muscle fibre is called the neuro muscular junction and motor end plate. A neural signal reaching this junction releases a neurotransmitter Acetyl choline which generates an action potential in the sarcolemma.
