Question

Mycocytes of sponges show

• A. Contractibility
• B. Nervous excitation
• C. Secretion of fibres
• D. All the above

Answer 1

The correct option is A Contractibility

Myocytes are modified contractile amoebocytes arranged around osculum. They guard and regulate the osculum, i.e., they work as a sphincter. They are long and fusiform cells which are found in the osculum. These cells are also found in many another contractile areas of sponges.

So, the correct answer is 'Contractibility'.