Unit 4- Homeostasis & Transport
I. Homeostasis: A. B. Examples of factors that must Be kept stable in humans:
C. Transport Destinations
C. How the body responds to fluctuations:
II. The Cell Membrane A. Description 1. 2.
3.
Proteins Membrane movement animation Polar heads love water & dissolve. Non-polar tails hide from water. Carbohydrate cell markers Fluid Mosaic Model
Outside of cell Inside of cell (cytoplasm) Lipid Bilayer Proteins Transport Protein Phospholipids Carbohydrate chains Animations of membrane structure The Cell Membrane Review
A. Passive Transport high low Weeee!! ! III. Cellular Transport
1. (simple) diffusion
2. 3.
2. Facilitated Diffusion Glucose molecules Protein channel
Each hole represents a specific protein channel where the surrounding plastic represents the impenetrable lipid bilayer 3.
B. Active Transport high low This is gonna be hard work!!
Protein changes shape to move molecules: this requires energy! 1. Protein Pumps Show video clip
2. Infoldings of the Cell Membrane
a. Endocytosis
Vesicle-mediated transport
IV. Recap of Cell Membrane A. Main Parts
B Drawing w/ functions
C. More on Phospholipids
* Water moves the fastest In & out of cells compared to other Substances because it can do Simple & facilitated diffusion Water diffuses according to its own gradient. V. Osmosis & Water regulation
A. Effects of different solutions 1. Isotonic Solutions
Osmosis Animations for isotonic, hypertonic, and hypotonic solutions Osmosis
2. Hypertonic Solutions
Osmosis Animations for isotonic, hypertonic, and hypotonic solutions Osmosis shrinks
3. Hypotonic Solutions
Osmosis Animations for isotonic, hypertonic, and hypotonic solutions Osmosis swells
4. Who cares? ∙I. V. Solutions Hydrating too much lost at sea
1. Animals: B. How Organisms Deal with Osmotic Pressure
Effect of Osmosis on Plant Cells 2. Plants & Bacteria & Fungi
3. Protists
4. Fish
Animations of Active Transport & Passive TransportAnimations This is a great review of all the cellular transport processes Types of Cellular Transport