BIO 264: Exam 2 review 2024 Updated Exam!!

BIO 264: Exam 2 review 2024 Updated Exam!! Which ion has greatest influence on resting membrane potential? - ANS Potassium (potassium has more leak channels on the membrane than sodium, which is why potassium has a higher permeability value and has more impact of resting membrane potential) Concerning resting membrane potential, the inside of the membrane is _______ compared to the ________ charged outside. - ANS negative, positively. T or F: The diffusion of K+ and Na+ down their chemical gradients contributes to the resting membrane potential - ANS F At resting membrane potential, ______________________. - ANS extracellular sodium levels are high During the hyper polarization phase... - ANS K+ leaves the cell Which is not a characteristic of a graded potential? A) Spreads in a decremental fashion B)Can result from changes in voltage across the membrane C) Can summate D) Size is inversely proportional to stimulus strength - ANS D As the stimulus strength and size of the graded potential _____________ the action potential frequency ___________. - ANS increases; increases The outside of a cell during resting membrane potential is _________ in relation to the inside of the cell. - ANS Positively charged