Question

The ability of a muscle to be stimulated is called

• A. Contractility
• B. Elasticity
• C. Extensibility
• D. Excitability

Answer 1

The correct option is D

Excitability

Excitability means that muscle responds to stimulation by nerves and hormones, making it possible for the nervous system and, in some muscle types, the endocrine system, to regulate muscle activity. Contractility refers to the capacity of muscle to contract or shorten forcefully. Extensibility means that muscles can be stretched to their normal resting length and beyond to a limited degree. Elasticity means that if muscles are stretched, they recoil to their original resting length.