Cell Membrane Diagram

What is the cell membrane composed of (2) ?i i

1. A bilayer of phospholipids with various types of proteins randomly placed through out

What is the fluid mosaic model based of ?i i

1. Based on the changing location (fluid) and random pattern of proteins (mosaic) in the phospholipid bilayer

What type of permeability is the cell membrane ?i i

1. Cell membrane is semi-permeable

What are phospholipids made of ?i i

1. Head region: phosphate + glycerol

2. Tail: 1 unsaturated 1 saturated fatty acid chain

Which parts of the phospholipid is hydrophilic and hydrophobic ?i i

1. Phosphate (outside) is hydrophilic

2. Lipid (inside) is hydrophobic

What are the 2 transport proteins ?i i

1. Carrier proteins

2. Channel proteins

What does the carrier protein do ?i i

1. Carries specific molecules with the right shape

What does the channel protein do (2) ?i i

1. Tunnel shaped with charge

2. Takes small ions with the correct, opposite charge

What does a receptor protien do ?i i

1. Has a specific site that allows a specific molecule to bind to it

What do recognition proteins do (2) ?i i

1. Has a specific carbohydrate chain attatched to it

2. Identify which cells belong to the body

What do enzymatic proteins do ?i i

1. Will cause a reaction to occur that will affect the metabolism of the cell

What are the 3 types of passive transport ?i i

1. Diffusion

2. Osmosis

3. Facilitated diffusion

What are the 2 types of active transport ?i i

1. Endocytosis

2. Exocytosis

What is diffusion, is energy required ?i i

1. Based on concentration gradient ([HIGH]→[LOW])

2. No energy

What is osmosis ?i i

1. Hypertonic →hypotonic

2. Diffusion into a cell based on water/solute concentration gradient

What is facilitated diffusion, is energy required ?i i

1. Faster diffusion for specific cells using a transport protein

2. No energy

What are the 2 types of endocytosis and what are they for ?i i

1. Pinocytosis (small molecules)

2. Phagocytosis (big like bacteria or macromolecules)

What protein does endocytosis use ?i i

1. Receptor proteins

What is active transport is atp required ?i i

1. Transport against concentration gradient. Low to high

2. Atp is required