calcium pump(redirected from calcium-transporting ATPase)
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1. an apparatus for drawing or forcing liquid or gas.
2. to draw or force liquids or gases.
blood pump a machine used to propel blood through the tubing of extracorporeal circulation devices.
breast pump a pump for taking milk from the breast.
calcium pump the mechanism of active transport of calcium (Ca2+) across a membrane, as of the sarcoplasmic reticulum of muscle cells, against a concentration gradient; the mechanism is driven by hydrolysis of ATP.
enteral feeding pump an infusion pump specifically designed for administration of a solution through a feeding tube.
insulin pump see insulin pump.
intra-aortic balloon pump see intra-aortic balloon pump.
muscle pump compression of veins by the contraction of skeletal muscles, forcing blood towards the heart against the flow of gravity; seen particularly in the deep veins of the lower limbs. Called also venous pump.
Na+-K+ pump sodium-potassium pump.
proton pump a system for transporting protons across cell membranes, often exchanging them for other positively charged ions.
sodium pump (sodium-potassium pump) the mechanism of active transport driven by the energy generated by Na+,K+-ATPase, by which sodium (Na+) is extruded from a cell and potassium (K+) is brought in, so as to maintain the low concentration of sodium and the high concentration of potassium within the cell with respect to the surrounding medium. A high concentration of intracellular potassium is necessary for vital processes such as protein biosynthesis, certain enzyme activities, and maintenance of the membrane potential of excitable cells. Called also Na+-K+ pump.
stomach pump see stomach pump.
venous pump muscle pump.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
a membranal protein that can transport calcium ions across the membrane using energy from ATP.
Farlex Partner Medical Dictionary © Farlex 2012
calcium pumpA calcium-pumping enzyme which is present in high concentrations (up to 90%) in the membrane of sarcoplasmic reticulum and activated by cATPase, which reduces cytoplasmic Ca2+, ends muscle contraction and allows muscle relaxation.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
cal·ci·um pump(kal'sē-ŭm pŭmp)
A membranal protein that can transport calcium ions across the membrane using energy from ATP.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012