nerve/muscle Flashcards
1
Q
three types of muscle
A
skeletal, cardiac and smooth.
2
Q
structure of the skeletal muscle.
A
3
Q
what is a motor unit
A
4
Q
Describe the process of excitation-contraction coupling.
A
Release ACh into the synaptic cleft bonding to the end motor plate. chemically gated ion channels. going down the t-tubules releasing calcium to leave the sarcoplasmic reticulum into sarcoplasm.
5
Q
length-tension relationship 3H
A
When the sarcomere is short the myosin and actin are too close and they cannot get the z-lines any closer
6
Q
3E
A
The optimal sarcomere length, all myosin heads can interact with actin to create cross bridges and tension.
7
Q
3A
A
At wide sarcomere, the myosin can NOT effectively bind to actin to create cross bridges
