Questions: Which property of muscle gives it the ability to stretch without damage? (A) Extensibility (B) Electrical excitability (C) contractility (D) Elasticity

The answer is (A) Extensibility: the ability of muscle to stretch without damage.

Explanation for each option:

• (A) Extensibility: This is the correct answer. Extensibility refers to the ability of muscle tissue to be stretched or extended without being damaged. This property allows muscles to lengthen when needed, such as during stretching exercises or when opposing muscles contract.

• (B) Electrical excitability: This property refers to the ability of muscle cells to respond to electrical stimuli, which is essential for initiating muscle contraction. It does not relate to the ability to stretch without damage.

• (C) Contractility: This property refers to the ability of muscle tissue to contract or shorten forcefully when stimulated. While important for muscle function, it does not pertain to stretching.

• (D) Elasticity: This property refers to the ability of muscle tissue to return to its original shape after being stretched or contracted. While elasticity is related to the recovery of muscle shape, it is not the property that allows muscles to stretch without damage.

In summary, the property that allows muscles to stretch without damage is extensibility.