AP BIO CH7 REVIEW

Amount of unsaturated phospholipids equals?

More permeability

Higher temperate equals?

More permeability

What would active transport do in a multicellular organism

Na+ or K+ pump ( to maintain membrane voltage)

Does facilitated diffusion require an input of energy?

No

Does simple diffusion require an input of energy

No

Does simple diffusion require transport proteins

No

Where does simple diffusion occur in the membrane?

Phospholipid bilayer

What are the three types of diffusion

Simple diffusion, facilitates diffusion and active transport

In an independent cell what would facilitated diffusion do

Use aquaporins to take in or release water

Does active transport require an input of energy?

Yes

Does active transport require transport proteins

Yes

Does facilitates diffusion require transport proteins

Yes

What characteristics of the cell membrane determine what gets into the cell and what doesn't?

Amount of transport proteins, types of transport proteins, amount of unsaturated phospholipids, higher temperature

What would facilitated diffusion do in a multicellular organism

Aquaporins taking in or releasing H2O

Where does active transport occur in the membrane?

Carrier proteins

In an independent cell what would active transport do

Endocytosis of large food particles and exocytosis

If a cell membrane were composed of just a phospholipid bilateral, what properties would it have?

Flexible, nonpolar

Where does facilitated diffusion occur?

In channel proteins or carrier proteins

What would diffusion do in a multicellular organism

Intake O2 release CO2

In an independent cell what would diffusion do

Intake oxygen release CO2 waste

Why are some cells more permeable to some substances than others?

They have more of that particular type of protein

What different roles and functions do membrane proteins serve?

Transport polar substances and large molecules, cell to cell recognition