Question

Which is true of contractile tissue of sphincter?
$1.$ Mesodermal
$2$. Contain stretch receptors
$3$. Rhythmicity
$4$. Indefatigible.

• A. All the four
• B. Only $1,2$ and $3$
• C. Only $1,2$ and $4$
• D. Only $1,3$ and $4$

Answer 1

The correct option is B Only $1,2$ and $3$

Tissue contraction is mainly responsible for the involuntary movements in the internal organs. It also forms the contractile component of the digestive, urinary, and reproductive systems as well as the airways and arteries. Contractile tissues have the following features (i) Mesodermal in origin. (ii) They contain stretch receptors (iii) Rhythmic contractions are seen in them (iv) Indefatigable it is not part of contractile tissue features. Thus Only 1,2 and 3 are correct. So option B is correct.