The direct source of energy for muscle contraction is:
1. ATP
2. Creatine phosphokinase
3. Oxidative phosphorylation of glucose
4. Reduction of pyruvate to lactate

The neurotransmitter released by the motor neurons at the neuromuscular junction is:

Identify the incorrect statement:
1. All motor neurons innervating a single muscle fiber constitute a motor unit.
2. Cross bridges occur when myosin heads combine with the binding sites on actin.
3. The neurotransmitter that stimulates skeletal muscle is acetylcholine.
4. The area of the sarcomere that contains only thin and elastic filaments is the I band.

Tetany is caused by:
1. low levels of Ca⁺⁺ in body fluids
2. high levels of Ca⁺⁺ in body fluids
3. low levels of K⁺ in body fluids
4. high levels of K⁺ in body fluids

An example of a fibrous joint ‘gomphosis’ in the human body is:

Abnormal curvature of the vertebral column where the alignment shows a lateral deviation is called as:

Accumulation of uric acid in joints will lead to:

Identify the protein that is not associated with others when the skeletal muscle is relaxed:

The membranous connective tissue closest to the individual muscle fiber in a skeletal muscle is called as:

It is much easier for a small animal to run uphill than for a large animal, because
1. It is easier to carry a small body weight
2. Smaller animals have a higher metabolic rate
3. Small animals have a lower O₂ requirement
4. The efficiency of muscles in large animals is less than in the small animals