September 11 Lecture

September 11 Lecture - September 11, 2008 The Generic Cell...

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September 11, 2008 The Generic Cell - Contains plasma membrane, cytoplasm, and nucleus Cytoplasm - Includes all material encased by membrane (except for nucleus) - Cytoplasm makes up approximately 55% of volume of the cell - Made up of fluid referred to as cytosol along with structural components - Two structural components are: o organelles (little organs) o inclusions - Organelles are distint structures surrounded by a limiting membrane, involved in cell’s metabolic activities - Inclusions are made up of particulate substances that are stored in the cytoplasm until they are needed (ex. lipids, pigments). These seldom have a surrounding membrane Organelles Endoplasmic Reticulum - ER system - Convoluted network of sacs/canals - Parts are associated by edge of nucleus all the way to the plasmalemma - Internal circulatory system - Materials produced by cell are transferred to endoplasmic reticulum and moved about the cell - Two types of Endoplasmic Reticulum 1. Rough endoplasmic reticulum (contains ribosomes) 2. Smooth Endoplasmic Reticulum (no ribosomes) Ribosomes - Microscopic (requires high magnification)
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This note was uploaded on 10/23/2011 for the course BIOL 2125 taught by Professor Dr.park during the Winter '02 term at A.T. Still University.

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September 11 Lecture - September 11, 2008 The Generic Cell...

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