Ion gradients - Study guides, Class notes & Summaries

Compartmentalization correct answers The segregation of functions into different compartments; in the cell, increases the efficiency of chemical reactions Lipid correct answers Any organic molecule that is poorly soluble or virtually insoluble in water but is soluble in nonpolar organic solvents; make up the membranes of cells Membrane correct answers Made of either phospholipids or phospholipids and sterols; often bilayers with polar head group facing outside from hydrophobic tails Per...

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...

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...

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...

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...

BIO 264: Exam 2 Review Latest Update Graded A+ 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 gradi...

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 (...

NROB60 Exam Questions With 100% Verified Answers Action Potential - answerDramatic redistribution of electrical charge across membrane. Rapid reversal of charge across membrane such that the interior becomes relatively positive (depolarization caused by influx of sodium) How to determine MP - answerMicroelectrode in cell, voltmetre used to measure electrical potential between tip of intracellular and extracellular microelectrode Membrane potential at rest - answer~-65mV Key parts of Acti...

____ 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...