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;
11 Cards in this Set
- Front
- Back
Cross bridge- |
|
|
|
Order of a muscle |
Epimysium, fascicles wrapped in perimysium, muscle cell/fiber surrounded by endomysium |
|
|
What are skeletal muscle fibers filled with? |
Myofibrils |
|
|
Sarcoplasmic reticulum (SR) |
Surrounds the myofibrils, stores calcium, calcium in the cell is used when muscle is contracting, when the cell is relaxed the calcium is stored |
|
|
T-Tubule |
Runs from top of muscle cell to bottom right next to the SR, has a hole inside |
|
|
Myofibrils |
Made up of continuous myofilaments (sacromeres) that divide the myofibrils. |
|
|
Sarcromeres |
Made up of actin (thin) and myosin (thick) filaments |
|
In depth sarcomere |
|
|
|
Importance of sarcomere |
It allows muscle contraction! |
|
|
How do sarcomeres, and therefor myofibrils, and therefor muscle cells, and therefore muscles, shorten? |
Actin 23:11 |
|
H band- only contains myosin A band- contains entire myosin I band- only contains Actin
|
|
