Biology 12 Chapter 16 - Support and Movements - 21

Biology 12 Chapter 16 - Support and Movements - 21

1. By nerve impulse muscle contraction initiate at………...?
Neural junction
Sites of muscle
Neuromuscular junction
At joints

2. The thousands of T-tubule of each muscle cell are collectively called?
T-system
None
M-system
Sarcoplasm

3. Contraction of muscle fibre based on following principle?
All or none response
None response
All of above
All response

4. High ATP requirement for muscle contraction is met by substance other than glycogen?
Phosphate ions
Creatine phosphate
Calcium phosphate
Glycogen phosphate

5. What is cause by the accumulation of lactic acid?
Tetanus
Fatigue
Cramp
Tetany

6. What is by low calcium in the blood?
Cramp
Tetany
Tetanus
Fatigue

7. The most common causes of cramp?
Electrolyte depletion
All of these
Dehydration
Low blood sugar level

8. What is the name of bacteria which cause tetanus?
Clostridium tetani
Clostridium tetany
E.coli
Sterptoccous tetani

9. What is the most common time when cramp occurs?
At night
After night
During exercise
At day

10. What is the rate of mortality in developing countries due to tetanus?
60%
50%
30%
40%

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