If a stimulus, several times greater than the threshold stimulus, is provided to a muscle fiber, it will
1. Contract with a larger force
2. Contract with a smaller force
3. Contract with the same force
4. Undergo tetany

During relaxation in smooth muscle:

1. calcium is removed from troponin.

2. ${\mathrm{Ca}}^{2+}$ bind to calmodulin.

3. myosin phosphatase removes phosphate from myosin.

4. Calcium is released from the sarcoplasmic reticulum.

A type of strength training in which the joint angle and muscle length do not change during contraction is termed as:

1. isometric contraction.

2. isotonic contraction.

3. concentric contraction.

4. eccentric contraction.

Assertion: Trained athletes have an increased proportion of energy derived from aerobic respiration of fatty acids.
Reason: Any adaptation that spares muscle glycogen will improve physical endurance.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

The drug curare causes:

1. flaccid paralysis.

2. spastic paralysis.

3. smooth muscle degeneration.

4. cardiac failure.