Stimulation of muscle contraction

Stimulation of muscle contraction -...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Stimulation of muscle contraction Neurons, or nerve cells, are stimulated when the polarity across their plasma membrane changes.  The polarity change, called an  action potential,  travels along the neuron until it reaches the end of  the neuron. A gap called a  synapse  or synaptic cleft separates the neuron from a muscle cell or  another neuron. If a neuron stimulates a muscle, then the neuron is a  motor neuron,  and its  specialized synapse is called a neuromuscular junction. Muscle contraction is stimulated through the  following steps:  1. Action potential generates release of  acetylcholine.  When an action potential of a  neuron reaches the neuromuscular junction, the neuron secretes the neurotransmitter  acetylcholine (Ach), which diffuses across the synaptic cleft.  2. Action potential is generated on the motor end plate and throughout the T tubules. 
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

Stimulation of muscle contraction -...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online