ANP 1105 Chapter Notes - Chapter 3.8 + 3.9: Nucleolus, Nuclear Membrane, Nucleoplasm

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1105
• Professor: Jacqueline Carnegie

Document Summary

3. 8 cilia and microvilli are two main types of cellular extensions. Cilia and motile cellular extensions from centrioles which occur in large numbers. Ciliary action moves substances in one direction across cell surfaces. They may also be defined as short surface cell projections; Flagella are projections from centrioles as well, but much larger. It is used to propel the cell in a certain direction (only example in a human is the sperm cell) They are smaller extensions of the plasma membrane which is projected from the cell surface. Its function is to increase the surface area for absorption. It is the largest organelle in a cell (surrounded by the nuclear envelope; contains fluid nucleoplasm, nucleoli, and chromatin) Function: transmits genetic information and provides the instructions for protein synthesis. 3. 9 the nucleus includes the nuclear envelope, the nucleolus, and chromatin. The nuclear envelope is a double membrane barrier with fluid filled space to separate the two membranes; it bounds the nucleus.