Transport proteins speed the passive movement of molecules across the plasma membrane in?

facilitated diffusion

Provide corridors that allow a specific molecule or ion to cross the membrane

channel proteins

Channel proteins include?

Aquaporins- for facilitated diffusion of water
Ion channels- that open or close in response to a stimulus

Carrier proteins undergo a subtle change in what?

shape that trans locates the solute binding site across the membrane

Kidney disease cystinuria

a disease cause my a malfunction in specific transport systems

Active transport uses energy against what?

The gradient

the solute moves down its concentration gradient and the transport requires no energy, therefore...

facilitative diffusion is still passive

Some transport proteins can move solutes against there?

concentration gradients

Moves substance against there concentration gradient

active transport

requires energy usually in the form of ATP

active transport

active transport Is performed by

Specific proteins embedded in the membranes

Active transports allows cells to maintain concentration gradients that

differ from their surroundings

what is an example of an active transport

sodium potassium pump