For most cells, the membrane potential is closer to the Ek+ (-90 mV) than for ENa+ (+ 60 mV) . This is because
A) EK+ <<<< ENa+, and systems tend toward lower energy states.
B) cells like potassium better than sodium, so they work to maintain potassium closer to its equilibrium distribution.
C) cell membranes are equally permeable to Na+ and Cl-, so every time a Na+ comes in, its depolarizing effect is negated by a Cl- ion.
D) cell membranes are more permeable to K+ than Na+, so there are a greater number of pathways available for K+ to move towards its equilibrium distribution than are available for Na+ to do the same.
E) none of these.
Correct Answer:
Verified
Q31: The internal (intracellular) receptor for steroid hormones
Q32: Two chambers containing aqueous solutions are separated
Q33: Potassium efflux from most cells is driven
Q34: Which of the following statements is FALSE?
A)
Q35: Two chambers are separated by a cation-permeable
Q37: Signaling molecules are divided into categories based
Q38: The equilibrium potential for most neurons is
Q39: Glycoproteins are found only on the outer
Q40: Net diffusion leads to the establishment of
Q41: The electrochemical gradient is the charge difference
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents