Test 3 (centered) Flashcards
1
Q
A-Band
A
The section of the sarcomere that corresponds with the alignment of myosin and actin filaments.
2
Q
Acetylcholine
A
A neurotransmitter released when an action potential arrives at the nerve terminal. The Acetylcholine diffuses across the neuromuscular junction causing excitation of the sarcolemma.
3
Q
Actin
A
A protein that forms actin myofilaments. Actin filaments consist of two thin strands about 6nm in diameter arranged in a double helix.
4
Q
Action potential
A
An electrical impulse from a motor nerve that signals the release of calcium from the sarcoplasmic reticulum into the myofibril, causing tension development in the muscle.
