Skeletal Muscle Easy Flashcards
(8 cards)
1
Q
What is the neuromuscular junction?
A
A meeting place between a motor neuron and a muscle fiber.
2
Q
What is the role of the sarcoplasmic reticulum?
A
It stores calcium ions.
3
Q
What are T-tubules?
A
They are extensions of the sarcolemma that help electrical impulses reach the muscle cell’s interior.
4
Q
What neurotransmitter is released at the neuromuscular junction?
A
Acetylcholine (ACh).
5
Q
What happens when ACh binds to the sarcolemma
A
An action potential is generated in the muscle fiber membrane.
6
Q
What triggers the release of calcium ions in the muscle cell?
A
The action potential traveling down the T-tubules.
7
Q
What is ATP’s role in muscle contraction?
A
It energizes the myosin heads for the power stroke and detaches cross-bridges.
8
Q
A
