Question

Which of the following cell of a sponge helps to maintain a water current in its body?

• A. Myocytes
• B. Chromocytes
• C. Pinacocytes
• D. Choanocytes

Answer 1

The correct option is D Choanocytes

Choanocytes are cells that line the interior of asconoid, syconoid and leuconoid body type sponges, that contain a central flagellum surrounded by a collar of microvilli, which are connected by a thin membrane. The flagellae beat regularly, crating a water flow across the microvilli, which can then filter nutrients from the water taken form the collar of the sponge. So, they generate a flow of water through the sponge pores, into the spongocoel, and out through the osculum. So, choanocytes help to maintain water current in sponges.

So, the correct answer is option D.