contains hundreds of muscle fibers that contract @ the same time. They are also controlled by a single motor neuron.
1. What does the SR do?
The SR is responsible for storing Ca2+ ions for use during muscle contractions. It is the main resource in deciding whether or not muscle contraction occurs or not.
2. What muscle does Abduction?
3. What muscle does Adduction?
4. What muscle does Extension?
5. What muscle does Flexion?
6. What muscle does Supination?
Supination Bicep Brachi
7. Isotonic Contraction - concentric
tension remains the same and muscle shortens
8. What is the origin?
One fixed point of attachment (Not moving) proximal to the insertion
---->Beginning of the muscle name
9. Isotonic Contraction - eccentric
tension remains the same and the muscle lengthens
10. Name 3 muscles part of mastication
1. Lateral pterygoid
2. Medial pterygoid
11. What is insertion?
One moving point of attachment (end of muscle name)
12. First step in muscle relaxation:
1. Ca2+ concentrations fall
2. Ca2+ detaches from troponin
3. Active sites re-covered by tropomyosin
13. Describe Thin filaments:
Located in Sarcomere.
14. What is cardiac muscle?
15. What is smooth muscle?
16. What is the convergent fibers?
A broad area converges on attachment site
Muscle fibers pull in different directions, depending on stimulation
example: pectoralis muscles
17. What is Unipennate fibers?
Fibers on one side of the tendon
example: extensor digitorum
18. What is Multipennate fibers?
Tendon branches within muscle
19. What is circular fibers?
Open and close to guard entrances of body aka sphincters
example: orbicularis oris
20. What muscles elevate the shoulder?
trapezius, levator scapulae, rhomboid major and rhomboid minor
21. What is the Trapezius?
Major muscle of the back and responsible for moving, rotating and stabilizing the scapula.
22. What is the lattismuis Doris?
major muscle of the back and is responsible for extension, adduction, abduction, and internal rotation.
23. What is the Levatir Scuplae?
A muscle found on the back and part of the neck. Responsible for elevating scapula and tilting glenoid cavity.
24. Define what the skeletal cell is and where its located?
25. What structures are part of the triad?
T-tubules and Sarcoplasmic reticulum
26. Describe thick filaments:
Contain Myosin and titin
usually found at the a-band of the sarcomere
27. What neurotransmitter is released during muscle synapse?
28. Which muscle types have single nuclei?
Smooth and Cardiac Cells
29. What forms from breaking down ATP?
ADP + Energy + diphosphate
30. Name 3 of the muscles moving the pectoral girdle:
1. Pectoralis major
2. Pectoralis minor