142 results found

Search Results for: ion

Generation of resting membrane potential

Stephen H. Wright Department of Physiology, College of Medicine, University of Arizona, Tucson, Arizona 85724... Read More

Oxidation

Oxidation Definition How do we define oxidation? There are several definitions of the oxidation process. Oxidation can be... Read More

Kidneys and Regulation of Water and Inorganic Ions

Renal Functions Kidneys remove/add substances from/to the plasma. Regulate water concentration, inorganic ion... Read More

Gated ion channel

(Science: physiology) transmembrane proteins of excitable cells, that allow a flux of ions to pass only under defined... Read More

Concentration gradient

Concentration gradient definition Concentration gradient refers to the gradual change in the concentration of solutes in a... Read More

Ion carrier

Definition noun, plural: ion carriers An ionophore that facilitates transport of ion through a hydrophobic medium, such as... Read More

Axon hillock

Axon Hillock Definition What is axon hillock? If you are familiar with the different parts of the neuron, the axon hillock... Read More

Fermentation

Fermentation Definition What is fermentation? Fermentation is the breaking down of sugar molecules into simpler compounds... Read More

Anaerobic respiration

Anaerobic Respiration Definition What is anaerobic respiration? Anaerobic (cellular) respiration is a respiratory process... Read More

Ligand gated ion channels

Ligand gated ion channel a transmembrane ion channel whose permeability is increased by the binding of a specific ligand,... Read More

Ionic bond

Definition noun plural: ionic bonds A type of chemical bond in which atoms, ions, or molecules are held together by... Read More

Facilitated diffusion

Facilitated diffusion is the transport of substances across a biological membrane from an area of higher concentration to an... Read More

Polarization

Definition noun (general) The condition of polarity (biology) The process or act of producing positive and negative... Read More

Zwitterion

Definition noun, plural: zwitterions A molecule carrying both a positive and a negative charge Supplement A zwitterion is a... Read More

Central metal ion

Central metal ion (Science: chemistry) The metal ion to which the ligands are attached at the centre of a coordination... Read More

Light-dependent reaction

Many organisms, such as green plants, convert light energy into chemical energy through the mechanism of photosynthesis. In... Read More

Active transport

Active transport is a type of cellular transport in which substances (e.g. ions, glucose, and amino acids) are transported... Read More

Ion

Ion (Science: chemistry, radiobiology) atomic particle, atom or chemical radical bearing an electric charge, either negative... Read More

Cellular respiration

Cellular Respiration Definition The main function of cellular respiration is to break down glucose to form energy. What is... Read More

Isoionic point

Definition noun The pH wherein a protein or a zwitterion in a deionized solution has equal number of cations and anions,... Read More

Ion Pump

A vacuum pump that removes gas by ionizing the atoms or molecules and adsorbing them on a metal surface.A protein... Read More

Sarcoplasmic reticulum

Definition noun plural: sarcoplasmic reticula (cell biology) The special type of smooth endoplasmic reticulum found in... Read More

Movement of Molecules Across Cell Membranes

Diffusion Diffusion is essentially the movement of molecules from a region of higher concentration to a region of lower... Read More

Transport

In biology, transport refers to the act or the means by which a molecule or ion is moved across the cell membrane or via the... Read More

Hydrogen

Hydrogen is one of the chemical elements found in nature. A chemical element refers to the pure substance of one type of... Read More

Hydroxide ions

Hydroxide is a polyatomic ion consisting of oxygen and hydrogen: OH− It has a charge of −1. Hydroxide is one of the... Read More

Denaturation

Denaturation Definition In biochemistry, denaturation is defined as a process in which a molecular structure deviates from... Read More

Duplication

Definition noun (general) The act or process of duplicating; the state of being duplicated; a doubling. (biology) The state... Read More

Deglutition

Definition noun (physiology) The act or process of taking (food or drink) to the mouth and then conveying it through the... Read More

Hyperpolarization

Definition noun The process or act of making the membrane potential of a cell more negative Supplement Hyperpolarization is... Read More

Oxidative phosphorylation

Definition noun A metabolic pathway that generates ATP from ADP through phosphorylation that derives the energy from the... Read More

Cation

Cation (Science: chemistry) a positively-charged... Read More

Mitochondrion

Definition noun, plural: mitochondria A spherical or rod-shaped organelle with its own genome, and is responsible for the... Read More

Modulation

modulation --> neuromodulation alteration in the effectiveness of voltage gated or ligand gated ion channels by changing... Read More

Anion

Anion a negatively-charged... Read More

Desorption

Definition noun A process wherein a substance is released from another, either from or through the... Read More

Reduction

reduction (Science: orthopaedics, surgery) The correction of a fracture, dislocation or hernia. The act of decreasing or... Read More

Gap junction

Definition noun, plural: gap junctions A type of cell junction characterized by the intercellular channel that is formed in... Read More

Homeostatic Mechanisms and Cellular Communication

Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory... Read More

Group translocation

Group Translocation Definition Just like your “home” is a private place where you and your comfort are maintained due... Read More