Search Results for: permeability
Permeability
Permeability Definition What is permeability? In earth science, its definition is this: "the ability of any material such... Read More
Selective permeability
Definition noun A feature and a function of the plasma membrane that is essential to maintain homeostasis by regulating the... Read More
Generation of resting membrane potential
Stephen H. WrightDepartment of Physiology, College of Medicine, University of Arizona, Tucson, Arizona 85724... Read More
Capillary permeability
Definition noun The property or capability of capillary walls to allow the selective flow of substances and cells into and... Read More
Cell membrane permeability
Cell membrane permeability a quality of cell membranes which permits the passage of solvents and solutes into and out of... Read More
Glycocalyx
What is the Glycocalyx? The glycocalyx is a polysaccharide-based gel-like, highly hydrous cellular thin layer, covering... 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
Impermeability
Definition noun The state or quality of a substance being impermeable or impassable, especially to fluids. Supplement Word... Read More
Cell membrane
Cell Membrane Definition Just like any non-living body possesses a plastic or paper packaging material that keeps the... Read More
Fluid mosaic model
Fluid Mosaic Model Definition What is the fluid mosaic model? The fluid mosaic model is a three-dimensional representation... Read More
Plasma membrane
Do all cells have a plasma (or cell) membrane? Yes, all cells have a biological membrane that separates the protoplasm from... Read More
Tight junction
What are tight junctions? Tight junctions are the intercellular barrier between two neighboring endothelial and epithelial... Read More
Hypertonic
Hypertonic Definition Hypertonic is a term used to describe an entity being in the state of hypertonicity, where there is a... 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
Vascular permeability
Definition noun The ability of blood vessel wall to allow small molecules (such as ions, water and nutrients) and whole... Read More
Hydrophilic
Hydrophilic Definition What does a hydrophile (or hydrophilic molecule) mean? If a molecule is “water-loving”, it is... Read More
Electroporation
Definition noun, plural: electroporations A non-chemical method that transfers the genetic material into the recipient cell... Read More
Thermophile
Thermophiles Definition What are thermophiles? Let us first understand the literal meaning of the word ‘thermophile’.... Read More
Phospholipid
What is a phospholipid? Phospholipids are a subgroup of lipids. Other major types of lipids are fatty acids, sphingolipids,... Read More
Hyperosmotic
Hyperosmotic Definition What is hyperosmotic? The word hyperosmotic is derived from two Greek words: 'hyper', meaning... Read More
Fibrinous exudate
What Is Fibrinous Exudate? Fibrinous exudate is a type of exudate (inflammatory fluid) that forms at the site of tissue... Read More
Amphipathic
Amphipathic Definition Amphipathic is a word used to describe a chemical compound containing both polar (water-soluble) and... 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
Cellobiose
Definition noun plural: cellobioses cel·lo·bi·ose, ˌsɛləʊˈbaɪəʊz A disaccharide made up of two glucose... Read More
Sonoporation
Definition noun A mechanical method of delivering molecules into the cell using sound, e.g. ultrasonic... Read More
An introduction to Homeostasis
Researched and Written by Jonjo MinnsSubmitted to biologyonline.com on February 25, 2009.Published in biologyonline.com... Read More
Triple response
Definition noun (immunology) The three cardinal circulatory responses of the skin (i.e. reddening, flare formation or... Read More
Axon terminal
An axon terminal is any of the button-like endings of axons through which axons make synaptic contacts with other nerve... Read More
Chromomere
Definition noun, plural: chromomeres (genetics) One of the beadlike granules that are arranged in a linear series along the... 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
Resting potential
Resting Potential Definition The resting potential of a cell is defined as the difference in electrical potential across... Read More
Prostacyclin
Definition noun, plural: prostacyclins Any member from the subfamily of eicosanoids, with a chemical formula of C20H32O5,... Read More
Phagocytosis
Phagocytosis Definition Phagocytosis is a basic physiological cellular process wherein a cell ingests a solid particle... Read More
Cell Structure
The interior of human cells is divided into the nucleus and the cytoplasm. The nucleus is a spherical or oval-shaped... Read More
Protein Activity and Cellular Metabolism
Protein Binding Sites The ability of various molecules and ions to bind to specific sites on the protein surface forms the... Read More
Nonapeptide
Definition noun, plural: nonapeptides An oligopeptide comprised of nine amino acid residues Supplement Peptides are monomers... Read More