Posted: July 13th, 2017

An action potential arriving at the motor endplate causes release of:

An action potential arriving at the motor endplate causes release of:
(a) acetylcholine which traverses the neuromuscular junction
(b) sodium ions which binds to sodium receptors on the muscle membrane
(c) calcium ions which initiate an action potential along the muscle fibre
(d) noradrenaline which increases muscle metabolic activity
(e) none of the above