Which of the following would NOT assist in establishing a resting membrane potential? O Selective diffusion allowing fewer positively charged ions to diffuse into the cell. O Selective diffusion allowing more positively charged ions to diffuse out of the cell. O Selective diffusion allowing more uncharged particles into the cell. O Having greater concentration of glycolipids on the outside surface of the membrane.

What is the correct rank the following molecules in regards to membrane permeability from MOST (1) to LEAST (4) permeable ? Each number can be used only once. Na+ (sodium ion) [ Choose ] [Choose] CO2 (carbon dioxide) 1 4 Glucose 2 H20 (water) [Choose]

Sodium (Na*) and Potassium (K+) are equally distributed across the neuronal membrane at resting membrane potential because of the: O Unassisted passive diffusion across the membrane O Nat/K+ Pump O Nongated Channels Voltage-gated Channels Chemically-gated Channels

A cell has a membrane potential of -100 mV (more negative inside than outside) and has 1,000 times more calcium ions outside the cell than inside. Which best describes a mechanism by which Ca2+ enters this cell? facilitated diffusion of Ca2+ into the cell down its electrochemical gradient movement of Ca2+ into the cell through an ion channel down its concentration gradient passive diffusion of Ca2+ into the cell down its electrochemical gradient cotransport of Ca2+ into the cell with Cl- movement of Ca2+ into the cell through a carrier protein down its electrical gradient I know that the answer is 1 but please explain why. Thank you.