Ion gradients - Study guides, Class notes & Summaries

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...

Briefly describe Bartter's syndrome and the role of the gene KCNJ1. - 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 potassium deficiency i...

NUR968: Membrane Potentials & Action Potentials; Cell Signaling & Second Messenger Systems Practice Questions and Answers What is the membrane potential? - Ans:-Defined as the electrical potential difference across a cell's plasma How are ions classified? (2) - Ans:-1. Cations (positively charged) 2. Anions (negatively charged) Although all positive & negative charges establish membrane potential, what are the 2 key players (ions)? - Ans:-1. Sodium 2. Potassium True or false: The n...

Full MLT ASCP| Practice Tests 100% Correct Questions and Answers / Study Guide Table of Contents MLT ASCP Practice (medical laboratory technicians) Test 2 Multiple Choice 2 MLT ASCP (Medical Laboratory Technicians/ASCP) Practice Test (Rationale) 19 Multiple Choice 19 MLT ASCP Practice Test (Medical Laboratory Technicians) Rationale 53 Multiple Choice 53 MLT ASCP Practice Questions Urinalysis & Body Fluids (medical laboratory technicians) Rationale 90 Multiple Choice 90 MLT Practice (...

Goal - To gain a basic knowledge that will enable you to make effective choices about your nutritional needs Healthy Diet - is one that provides the right amount of energy to keep weight in the desirable range; the proper types and balance of carbohydrates, proteins, and fats; plenty of water; and sufficient but not excessive amounts of essential vitamins and minerals. Metabolism - is the set of life-sustaining chemical transformations within the cells of living organisms. These enzyme-cat...

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

VIRGINIA TECH BMSP 2135 RAT #13 QUESTIONS AND ANSWERS, GRADED A+/ VERIFIED. *3 components of muscle relaxation* (1) ACh release stops (2) the remaining ACh in the synaptic cleft is broken down (3) ___________ _______ concentration in the cytosol returns to its resting level - -calcium ion *contraction steps* (1) Calcium ions bind to _____________ (2) Tropomyosin moves, and the active sites of actin are exposed - -troponin *contraction* in a resting muscle fiber, the regulatory prote...

____ are selective permeable - membranes _______ are also embedded in the membrane of the transport vesicle that are recognized by specific organelles. - docking sites _____, _____ , some ____ and ____ pass freely from one cell to the next. - water, small solutes, proteins, RNA (in animals) Cholesterol ____ the membrane fluidity at ____ temperatures but at____ temperatures ____ solidification - reduces, moderate, low, hinders (in plants) unsaturated tails prevent ? - packing. saturated ta...

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