Transport proteins speed the passive movement of molecules across the plasma membrane in?
Provide corridors that allow a specific molecule or ion to cross the membrane
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 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?
Moves substance against there concentration gradient
requires energy usually in the form of ATP
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