cell transport & osmosis n tonicity BIO 4
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9 Terms
Cell membrane is made up of what?
Phospholipids
What are phospholipids made up of?
Hydrophilic (water loving) head
Hydrophobic (water fearing) tail
The phospholipids do what to the cell membrane?
Creates a waterproof barrier
The fluid mosaic model is the structure of a cell membrane.
What is included into this structure?
Phospholipids - the waterproof barrier
Proteins - helps and is the movement of materials through the structure
Carbohydrates - glycoproteins and glycolipids (create recognition )
Cholesterol - stabilizes the cell membrane
The cell membrane is picky about what enters and leaves the cell this being called….
Selective permeability
Selective permeability does what?
Allows materials to enter but not others (smaller vs larger)
Helps maintain homeostasis
Passive transport definition
Passive transport is movement of materials from low to high concentration
Active definition
Movement of materials from low to high moving concentration gradient
Difference between passive and active
Passive transport uses NO ATP energy
Active transport used ATP energy in the process