MEDICAL PHYSIOLOGY

Detailed explanation-1: -Excitability is the ability to respond to a stimulus, which may be delivered from a motor neuron or a hormone. Extensibility is the ability of a muscle to be stretched.

Detailed explanation-2: -Excitability, also termed responsiveness, is the ability of a cell to receive and respond to a stimulus by changing its membrane potential. In the case of muscle, the stimu-lus is usually a chemical-for example, a neurotransmitter released by a nerve cell.

Detailed explanation-3: -Excitability: this refers to muscle tissue being able to react to nervous stimulation. Extensibility: this refers to the ability of muscle tissue to lengthen when contracting and provide the effort required to move the lever system (the bones and joints), producing coordinated movement.

Detailed explanation-4: -Excitability-ability to respond to stimuli; Contractibility-ability to contract; Extensibility-ability of a muscle to be stretched without tearing; Elasticity-ability to return to its normal shape.

Detailed explanation-5: -In contrast to both smooth muscle and cardiac muscle, skeletal muscle contracts primarily in response to a voluntary stimulus.