Organelles in an Epithelial Cell
- Created by: caitlin1997
- Created on: 11-09-14 14:36
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- Organelles in an Epithelial Cell
- The Nucleus
- The nuclear Envelope is a double membrane that surrounds the nucleus. Outer membrane is continuous with endoplasmic reticulum and often has ribosomes on it's surface. Controls entry and exit of materials.
- Nuclear pores allow passage of messenger RNA in and out of the nucleus
- Nucleoplasm is the material that makes up most of the nucleus
- Chromatin is the DNA in the nucleoplasm
- The nucleolus manufactures RNA and assembles ribosomes
- The Mitochondrion
- The outer membrane controls the entry and exit of material. The inner membrane is folded into cristae to produce a larger surface area
- Cristae are extensions of the inner membrane, Provide large surface area for the attachment of enzymes in respiration
- The Matrix is a semi solid material containing protein, lipids and DNA so the mitochondria can make their own proteins
- Endoplasmic Reticulum
- Rough Endoplasmic Reticulum (RER) have ribosomes present on the outer membranes to provide a large surface area for the synthesis of proteins and glycoproteins and provide a pathway for materials to be transported in and out of a cell.
- Smooth ER (SER) synthesise, store and transport lipids an carnohydrates
- Golgi Apparatus
- Form glycoproteins
- Produce secretory enzymes
- Secrete carbohydrate
- From lysosomes
- Lysosomes
- Break downmaterial
- Release enzymes and digest used organelles
- Microvilli
- Finger like projections on an epithelial cell that increase it's surface area to allow more effecient absorbtion
- The Nucleus
- Lysosomes
- Break downmaterial
- Release enzymes and digest used organelles
- Ribosomes
- 80S found in eukaryotic cells and 70S found in prokaryotic cells
- Responsible for protein synthesis
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