I\'m very confused on how to answer these questions, please help. Obtain a prepa
ID: 146577 • Letter: I
Question
I'm very confused on how to answer these questions, please help.
Obtain a prepared slide of choanocytes (Schypha: grantia). It is a longitudinal section of a syconoid body plan. DRAW at 400x a section of the canal lined with choanocytes. Label the canal and choanocytes naja Choanocytes Total magnification 400x ANSWER the following about choanocytes: 1. Why are choanocytes call "collar" cells? 2. Explain the location of choanocytes within a sponge 3. How do choanocytes function to bring in food and oxygen and get rid of waste and carbon dioxide? 4. What do they do with the food particles? Prepare a slide of spicules. Observe under 400x magnification and draw in your notebook.Explanation / Answer
To answer such type of questions you should go through the entire process of slide preparation and its explaination, then you can give answer. such as in first portion of the question you should know about why choanocyes are called collar cells. Following is the way to answer the question:
1) Choanacytes are called collar cells because the 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.
2) Choanocytes are found dotting the surface of the spongocoel in asconoid sponges and the radial canals in synconoid sponges, but they comprise entirely the chambers in leuconoid sponges.
Draw diagrams of Asconoid, synconoid and leuconoid indicating choanocytes cells.
3) By cooperatively moving their flagella, Choanocytes generate a flow of water through the spongs pores, into the spongocoel and out through the osculum. This improve both respiratory and digestive functions of the sponges, pulling in oxygen and nutrients and allowing a rapid excretion of carbon dioxide and other waste product.
4) The water current created by the flagellum bring food particles into the sponge cavity and the microvilli of collar filter capture these food particles. The particles are the pushed into the center of cell where they are ingested.