1. What is the initial stimulus for muscle contraction?
2. Which neurotransmitter is released at the neuromuscular junction after the action potential arrives?
3. When receptors open at the neuromuscular junction, does sodium travel in or out of the muscle fiber?
4. The action potential continues to travel down the muscle fiber on which structures? Which ion is released from the sarcoplasmic reticulum as this happens?
1. What is the initial stimulus for muscle contraction? 2. Which neurotransmitter is…
1. What is the initial stimulus for muscle contraction?
