Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
Fused tetanus |
No evidence of relaxation before contractions |
|
Basic muscle types |
Skeletal, cardiac, smooth |
|
Connective tissue wrappings |
Cells are surrounded and bundled by connective tissue |
|
Endomysium |
Encloses a single muscle fiber |
|
Perimysium |
Wraps around a fascicle of muscle fibers |
|
Epimysium |
Covers entire skeletal muscle |
|
Fascia |
Located on the outside of the skeletal muscle |
|
Tendons |
Cord-like structures |
|
Aponeurosis |
Sheet-like structures |
|
I band |
Light band, contains only thick filaments |
|
A band |
Dark band, contains the entire length of the thick filaments |
|
Tetanus |
Summing of contractions |
|
Twitch |
Single, brief contraction |
|
Unfused tetanus |
Some relaxation occurs between contractions |
|
Atp |
Stored by muscles |
|
Contraction |
Muscle response to stimuli |
|
Muscle force |
Depends on the number of fibers stimulated |
|
Multinucleated |
Multiple nucleus |
|
Striated |
Visible banding |
|
Voluntary |
Subject to conscious control |
|
Reason for muscle contractions |
Movement of microfilaments |
|
Characteristic of smooth and skeletal muscles |
Elongated |
|
Skeltal muscle function |
Produce movement, maintain posture, stabilize joints, generate heat |
|
Synaptic cleft |
Area between nerves and muscles |
|
Neurotransmitter |
Chemical released by nerve upon arrival of nerve impulse |
|
Acetylocholine |
Skeletal muscles neurotransmitter |
|
Sarcolemma |
Permeable to sodium |
|
Graded responses |
Different degrees of skeletal muscles shortening |
|
Atp bonds |
Broken to release energy |
|
Muscles contract until.. |
They run out of energy |