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Biology 21 Online
OpenStudy (anonymous):

Which of the following best describes a process that helps a cell maintain homeostasis without requiring energy to be used? Channel proteins provide a passage for molecules to cross the membrane via facilitated diffusion. Membrane carrier proteins help substances enter the cell against a concentration gradient. Pieces of the cell membrane for vesicles circulate around extracellular materials during endocytosis. Protons are pumped out of the cell to create a voltage across the cell membrane.

OpenStudy (anonymous):

@lemon_chesse_crabs

OpenStudy (anonymous):

its definitly not the last one, cuz that requires energy... just a sec

OpenStudy (anonymous):

im pretty sure its B. Membrane carrier proteins help substances enter the cell against a concentration gradient.

OpenStudy (anonymous):

Thank you!

OpenStudy (anonymous):

Can you help me with one more?

OpenStudy (anonymous):

sure, i love the medals

OpenStudy (anonymous):

whats the question @saadabdullah1000

OpenStudy (anonymous):

The sodium-potassium pump is called an electrogenic pump because it

OpenStudy (anonymous):

transports proteins that generates voltage across a membrane

OpenStudy (anonymous):

which one would it be? is used to drive the transport of other molecules againts a concentration gradient. pumps hydrogen ions out of the cell. contrivutes to the membrane potential. pumps equal quantities of Na+ and K+ across the membrane.

OpenStudy (anonymous):

i think its B, but let me double check my notes

OpenStudy (anonymous):

scratch that, its C contrivutes to the membrane potential

OpenStudy (anonymous):

what did ya get?

OpenStudy (anonymous):

yea

OpenStudy (anonymous):

thanks

OpenStudy (anonymous):

no prob. ask anytime

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