Final Exam! Flashcards
1
Q
What is the Sliding Filament Theory?
A
- Action Potential - Nerve Impulse
- Ca+ pops out of terminal cistern of SR
- Ca+ binds to Troponin on ACTIN
- Tropomysium spins
- Exposes binding sites
- MYOSIN head binds to sites
- Head flexes
- moves ACTIN
- ATP binds to Myosin
- Myosin head releases ACTIN
- Myosin returns to start
- Re-energizes MYOSIN
- Ca+ release from troponin
- Tropomyosin covers binding sites
- Actin relaxes
- Ca+ returns to SR
2
Q
What causes muscle fatigue???
A
No more ATP and low on Ca+
3
Q
Name the muscle hierarchy and associated coverings
A
Whole Muscle (flesh) - covered by Epimysium
Fasical (tissue) - covered by Perimysiuym
Myofiber (cell) - covered by Endomysium’
Myofibrils (organelle) - covered by Sarcoplasmic reticulum
Filament (proteins) - Actin and Myosin
