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6. What is the effect of changing the heart rate by altering cardiac nerve activity or SA node rhythms?
- Chronotropism
- Inotropism
- Dromotropism
7. What is the function of calmodulin?
- To prevent Ca2+ from diffusing out of the sarcoplasmic reticulum
- To bind to Ca2+ ions in smooth muscle, activating cross-bridge formation
- To bind to Ca2+ ions in smooth muscle, activating Myosin Kinase
- To bind to Ca2+ ions in cardiac muscle
8. What membrane surrounds each individual muscle fibre?
- Epimysium
- Sarcolemma
- Endomysium
- Perimysium
9. What is the most basic contractile unit of a muscle?
- Myofibril
- Muscle fibre
- Sarcomere
- Fasciculus
10. What is the effect of speeding up the rate of conduction in heart tissue?
- Dromotropism
- Chronotropism
- Inotropism
11. Which muscle type relies on Calcium-induced-Calcium release?
- Cardiac muscle
- Smooth muscle
- Striated muscle
12. Which muscle type has the least developed sarcoplasmic reticulum?
- Striated muscle
- Smooth muscle
- Cardiac muscle
13. What are the dark striations that appear on histological slides?
- A-band
- I-band
- Z-discs
- H-zone
14. What is the I-band?
- Area of thick myosin filaments and thin actin filaments
- Area of thin actin filaments
- Area of thick myosin filaments
15. What connects muscle to bone?
16. Which muscle cells are multinucleate?
- Striated and cardiac muscle
- Striated muscle only
- Cardiac muscle only
- Striated, cardiac and smooth muscle
17. What is the function of myosin light chain kinase?
- To remove the phosphate group from the myosin light filament
- Phosphorylation of myosin light filament
- To move calcium ions out of the sarcoplasm
18. What does Troponin I bind to?
- The actin filament
- The myosin filament
- The tropomysin
- The calcium ions
19. What is the effect of altering the force of muscular contractions?
- Chronotropism
- Inotropism
- Dromotropism
20. What is the function of calsequestrin?
- To move Calcium ions into the sarcoplasmic reticulum
- To bind myosin heads to actin filaments
- Prevents Calcium ions from leaving the sarcoplasmic reticulum
- To move Calcium ions out of the sarcoplasmic reticulum