cell transport

How do cells maintain homeostasis

Cell control what goes in and out

What is a concentration gradient

The difference in concentration from one area to a another

What is the diffusion?

Movement from an area of high concentration to low concentration

What is facilitated diffusion?

Diffusion of large molecules, like glucose and ions for transport proteins

What is simple diffusion

Diffusion of nonpolar and small polar molecules across the lipid bilayer

Why is facilitated in simple diffusion considered passive transport?

Diffusion does not require energy

What is a channel protein?

A protein tunnel that lead specific molecules are a flow through. It can be open or closed and it’s common for ions and water.

What is a carrier protein?

More like a revolving door than an open doorway, a molecule binds to the protein, causing the protein to change shape and shut the molecule through, more common for a larger molecules like glucose

Difference between passive and active transport

Passive transport is transported to high to low without these energy active transport requires energy because it’s moving molecules from low to high concentration

What is a protein pump?

A type of carrier proteins that transport molecules and ions from low to high concentration against the concentration gradient using ATP and it’s an active transport

What is sodium potassium pump?

Uses energy to transport an a out of cell and K into the cell these pumps or essentials to neurons and muscles cells functioning

What is bulk transport?

It’s another form of active transport in is the transport of large quantities of ions and molecules with the aid of vesicles, it uses a lot of energy

What is endocytosis?

It is a transport of particles into a cell by closing them in a vesicle made Out of the plasma membrane.

How does endocytosis happen?

The cell membrane folds in in golfing the particles, and then the pocket pinches becoming a newly formed physical with engulfed particles

What does exocytosis?

Is an active transport in bulk transport of particles out of cell

How does exocytosis happen?

Secretory bicycles are carried to the cell membrane in the vesicles fuses with the membrane, releasing its contents outside the cell