Chapter 19.2, Problem 1NV

Summary Introduction

To determine:

Definition of the terms pellicle, trichocyst, contractile vacuole, pseudopod, and test.

Explanation of Solution

Pellicle is a thin layer of a supporting cell membrane in many protozoa. It is present below the cell membrane.

Trichocyst: It is a rod-like structure from which the filament and is found nearby the surface of the ciliates and dinoflagellates.

Contractile vacuole: it is a bubble-like structure that is known to have a function in osmoregulation as well as the removal of waste.

Pseudopod: It is a temporary extension of the cytoplasm that helps in the locomotion of several protozoans found especially in the amoeboid cells.

Test: It is a covering of the amoeba-like organism, which partially covers the animals and through the gap between covering pseudopodia protrudes out when required.