ion-permeable membrane

См. также в других словарях:

• ion-selective membrane — a membrane that is more permeable to particular types of ions than to other types, e.g., K+ selective glass membrane. Many biological membranes exhibit ion selective behavior …   Medical dictionary

• ion-exchange reaction — ▪ chemical reaction Introduction       any of a class of chemical reactions between two substances (each consisting of positively and negatively charged species called ions (ion)) that involves an exchange of one or more ionic components.… …   Universalium

• ion-selective electrode — An electrode half cell, with a semi permeable membrane that is permeable only to a single ion. The electrical potential measured between this and a reference half cell (eg. a calomel electrode) is thus the Nernst potential for the ion. Given that …   Dictionary of molecular biology

• ion channel — n a cell membrane channel that is selectively permeable to certain ions (as of calcium or sodium) * * * a cell membrane protein with an ion specific transmembrane pore, through which ions and small molecules pass into or out of a cell by… …   Medical dictionary

• Membrane potential — Differences in concentration of ions on opposite sides of a cellular membrane lead to a voltage called the membrane potential. Many ions have a concentration gradient across the membrane, including potassium (K+), which is at a high inside and a… …   Wikipedia

• Ion channel — Not to be confused with: Ion Television or Ion implantation. Schematic diagram of an ion channel. 1 channel domains (typically four per channel), 2 outer vestibule, 3 selectivity filter, 4 diameter of selectivity filter, 5 phosphorylation site, 6 …   Wikipedia

• Membrane transport — In cellular biology the term membrane transport refers to the collection of mechanisms that regulate the passage of solutes such as ions and small molecules through biological membranes namely lipid bilayers that contain proteins embedded in them …   Wikipedia

• Ion trapping — The build up of a higher concentration of a drug across a cell membrane due to the pKa value of the drug and difference of pH across the cell membrane is known as ion trapping. Generally speaking, this results in basic drugs accumulating in… …   Wikipedia

• membrane — 1. A thin sheet or layer of pliable tissue, serving as a covering or envelope of a part, as the lining of a cavity, as a partition or septum, or to connect two structures. SYN: membrana [TA]. 2. SYN: biomembrane. [L. membrana, a skin or m …   Medical dictionary

• ion channel — noun Date: 1985 a cell membrane channel that is selectively permeable to certain ions (as of calcium or sodium) …   New Collegiate Dictionary

• Semipermeable membrane — Scheme of semipermeable membrane during hemodialysis, where red is blood, blue is the dialysing fluid, and yellow is the membrane. A semipermeable membrane, also termed a selectively permeable membrane, a partially permeable membrane or a… …   Wikipedia