Lecture 8, Nerve/Muscle 4 Flashcards
1
Q
What happens during excitation?
A
The motor neuron excites the muscle fibre, causing an electro-chemical-electro transmission.
2
Q
Cross bridge cycling (sliding of the myofilaments) shortens sarcomeres, producing force and tension in the muscles. What is this process called?
A
Contraction
3
Q
What is relaxation?
A
The re-uptake of Ca(2+) in internal stores, cross bridges de-attach, and return to their resting state.
4
Q
What happens when the action potential arrives at the t-tubule?
A
It initiates Ca(2+) release from the sarcoplasmic reticulum.
5
Q
What is a sarcomere?
A
A contractile unit of a myofiber
