Ion gradients - Study guides, Class notes & Summaries

Which ion has greatest influence on resting membrane potential? 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. negative, positively. T or F: The diffusion of K+ and Na+ down their chemical gradients contributes to the resting membrane potenti...

GMS-6440 Medical Physiology Exam 1 Questions With 100% Correct Answers 2024 What chemical component of the plasma membrane prevents ions from readily and freely moving across the membrane? - answerLipids (phospholipids) Where is the concentration of [K+] greater? - answerIn the cytoplasm Across a cell's plasma membrane, movemen of water is a ___________ event. - answerPassive through a channel. Where is the concentration of [Na+] greater? - answerIn the extracellular fluid. For a neutra...

B-lactam resistance - Lactamases - enzymes that cleave beta lactam structure usually between carbon and nitrogen - makes it no longer a structural mimic and transpeptidase keeps cross-linking peptide side chains Antimicrobial Agents - Agents that kill microorganisms or inhibit their growth -cidal agents kill -static agents inhibit growth Household cleaners are disinfectants 14 out of 20 burn patients get pseudomonas infections from stainless steel tub cleaned with a quat.. why? - Quats d...

Biology Lecture Notes FINAL END OF YEAR 2023 (STEMer’s guide) 2024 Lecture (3) Resting potential – Action potential 2 | P a g e ION PUMP AND ION CHANNELS ESTABLISH THE RESTING POTENTIAL OF A NEURON As you know, ions are unequally distributed between the interior of cells and the fluid that 3 | P a g e surrounds them. As a result, the inside of a cell is negatively charged relative to the outside. Because the attraction of opposite charges across the plasma membrane is a source of p...

Biology Lecture Notes (STEMer’s guide) 2024 Lecture (3) Resting potential – Action potential Mr. Youssef Nagah Biology Lecture Notes Y. Nagah 2 | P a g e Ion pump and ion channels establish the resting potential of a neuron As you know, ions are unequally distributed between the interior of cells and the fluid that surrounds them. As a result, the inside of a cell is negatively charged relative to the outside. Because the attraction of opposite charges across the plasma membrane is...

UConn PNB 2274 Exam 2 – Tanner Study Guide with Complete Solutions Principles Electrostatic Attraction - Ans:-- charge attraction - positively charged ions will be attracted to negatively charged ions Principles Chemical (diffusional) Gradients - Ans:-- when a membrane is selectively permeable positively charged ions will flow to the one side making the other side negative due to leak channels. - making one side harder to diffuse with the outside of the cell because it is attracted to th...

BIO 264: Exam 2 review Which ion has greatest influence on resting membrane potential? 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. negative, positively. T or F: The diffusion of K+ and Na+ down their chemical gradients contributes to ...

Briefly describe Bartter's syndrome and the role of the gene KCNJ1. Answer> Bartter's syndrome is a genetically inherited disease that causes excess salt loss and the hardening of kidney tissue. Type II Bartter's syndrome, which is antenatal, is caused by a mutation in the KCNJ1 gene. Mutations in KCNJ1 gene change/delete amino acids in ROMK which results in a dysfunctional/nonfunctional protein. ROMK moves potassium across kidney cell membranes so dysfunctional ROMK causes pota...

BIO 264: EXAM 2 REVIEW 2024 WITH 100% CORRECT ANSWERS Which ion has greatest influence on resting membrane potential? - correct answer 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. - correct answer negative, positively. T or F: The dif...

Bio 669 Quiz 2 |Gradient Potential| Neurons| Electrons| Complete Mock Exam 2024/2025 What is the primary function of neurons in the nervous system? Neurons transmit signals throughout the body to facilitate communication between the brain and other body parts. What is the resting membrane potential of a typical neuron? Approximately -70 mV. How does the concentration gradient influence ion movement across a neuron's membrane? Ions move from areas of high concentration to areas...