Identify the most abundant of the muscle proteins:
1. actin
2. troponin
3. myosin
4. tropomyosin

Identify the one that is not associated with others when a muscle is not contracting:
1. actin
2. myosin
3. troponin
4. tropomyosin

Muscles get their energy directly from:
1. glucose
2. ATP
3. creatine phosphate
4. creatinine

Muscles store excess glucose as:
1. creatine
2. glycogen
3. amylopectin
4. creatinine

Even when the blood supply is inadequate, the muscle is able to sustain contraction due to:

The minimum stimulus needed to cause a contraction is called the:
1. chronaxie
2. threshold
3. rheobase
4. reversal potential

A sustained muscle contraction evoked when the motor nerve that innervates a skeletal muscle emits action potentials at a very high rate is called as:
1. a sustained contraction
2. fatigue
3. tetanic contraction
4. treppe

The continuous and passive partial contraction of the muscles is called as:
1. tetany
2. tonus
3. sustained contraction
4. summation

Stimulation by a nerve impulse is always required for the contraction of:
1. multi-unit smooth muscle
2. skeletal muscle
3. visceral smooth muscle
4. cardiac muscle

A decrease in the mass of the muscle most commonly experienced when persons suffer temporary disabling circumstances is called as:

1. hypertrophy

2. atrophy

3. dystrophy

4. peristalsis