Celluar Transport

What is it important for?

to move material into and out of the cell

What enters?

Nutrients

What leaves?

Waste

Why is celluar transport important?

to maintain homeostatsis

What is passive transport?

it is the action of molecules moving down the concentration gradient

What motion does the concentration gradient during passive transport go?

High to Low

Does passive transport need energy?

No it doesn't

Active Transport/ Molecular Transport

the transport of large and or polar molecules

Does active transport require energy?

Requires energy

Does active transport go with the concentration gradient?

No it goes against (low to high)

What are the types of passive transport?

Simple and Facillitated

Simple Diffusion Characteristics

particles are always moving

Does Simple Diffusion reach equillbrium and if so how fast?

Slowly, and Achieves Equillibriam

Which direction does simple diffusion go when it achieves equillibriam?

Both, Random directions

Does Simple Diffusion need energy?

No it's a form of passive transport therefore doesn't need energy. SD

What does various mechanisms exist for?

different types of molecules, Small vs Large, Polar Molecules/Ions vs Nonpolar molecules

What does facillitated diffusion uses and what for?

It uses protein channels to quickly move particles, small polar molecule or ions. S-L

In facillitated diffusion is the proteins specific to the particle they move?

Yes it is in facilitated diffusion

Can simple and facilitated diffusion work without a concentration gradient?

No there has to be a concentration gradient in order for there to be equilibrium

In diffusion does the speed change when you are closer to achieving equallibriam?

Yes, faster when farther, slower when closer

Give an example of a molecule that uses facilitated diffusion?

Glucose

What are the types of Active Transport?

Endocytosis and Exocytosis and Molecular

Active transport's energy is called what?

ATP

Facilitated

uses carrier/transport proteins to cross over the membranes

When molecules go through the carrier in active transport what happens?

the protein changes shape when pumping molecules across

To open and close the pump in molecular transport what is needed?

ATP

What is molecular transport's goal?

to create a concentration gradient to make the amount of molecules always uneven

Endocytosis

large or many materials taken into the cell

How does into endocytosis occur?

makes a bubble and breaks off into a vacuole/pocket

What does endocytosis need?

space in the membrane

Two types of endocytosis

Phagocytosis and Pinocytosis

Phagocytosis

cell eating, engulfs it

Pinocytosis

cell drinking with small molecules in it, takes droplets of fluid in surrounding enviorment

Exocytosis

releasing a MEGA LARGE material out of the cell

How does exocytosis occur?

the membrane of the vacuole fuses with the original membrane and the insides aka the molecules are kicked out

Is there a need for proteins in exocytosis?

Yes for proteins in exocytosis