Chapter 3: Cells Part I: Differentiated Cells, Composite Cells, Cell Membrane.
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Transcript of Chapter 3: Cells Part I: Differentiated Cells, Composite Cells, Cell Membrane.
Chapter 3: Cells
Part I:Differentiated Cells,
Composite Cells, Cell Membrane
Cells
• Adult human body has __________
• ______varieties of cells
• Cells are considered to be “_________”– different _________ and ____________
Cells vary in size and shape
Red Blood Cell (RBC) 7.5 μm
1 micrometer (1μm) = 1 x10-6 m)
Human Egg Cell (Ovum)
140 μm
Smooth Muscle Cell
20-500 μm long
Nerve Cell
Can be many cm in length
White Blood Cell
10-12 μm
Composite Cell
• Generic Cell
• Three major parts 1.
2.
3.
Fig. 3.3
Cell Membrane
• Surrounds the outside of the cell1.
2.
• Many functions1.
2.
Cell Membrane Structure
• Phospholipids– Hydrophilic heads- “water”
• exposed to
– Hydrophobic tails- “oil”• lipid soluble substances
– Ex.
• water soluble substances– Ex:
Fig. 3.6
• Cholesterol1.
2.
Cell Membrane Structure
Fig. 3.7
Cell Membrane Structure
• Proteins1. Receptor proteins-
2. Integral proteins-
Fig. 3.7
Cell Membrane Structure
• Proteins 3. Enzymes-
4. Cellular Adhesion Molecules (CAMS)-
5. Cell Surface Proteins -
Fig. 3.7
Intercellular Junctions
• Individual cells vs. groups of cells
• Permanently connect cell membranes of groups of cells1.
2.
3.
Clinical App. 3.1: Faulty Ion Channels
• Ion channels1.
2.
3.
• Cystic Fibrosis and Cl- Channels1. Abnormal2. Thick mucous
• A. • B. • C.
3. Treatment: