472 results found

Search Results for: substance

Substance

Definition noun, plural:substances (1) The physical matter, material or that of which an organ or body consists. (2)... Read More

Nervous System

    THE is the most complicated and highly organized of the various systems which make up the human body. It is the... Read More

Threshold substance

threshold substance Any material (e.g., glucose) that is excreted in the urine only when its plasma concentration exceeds a... Read More

White substance

white substance --> white matter (Science: anatomy) brain tissue composed of myelin-coated nerve cell fibres. White... Read More

Cortical substance

Definition noun (anatomy) The outermost or superficial layer of an internal organ or body structure, such as kidney or... Read More

Ground substance

Definition noun (1) The amorphous, gel-like, noncellular component of the extracellular matrix where the fibers and cells... Read More

BIOACCUMULATION

Bioaccumulation - a general term for the accumulation of substances, such as pesticides (ddt is an example), methylmercury,... 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

Heating curve

Definition noun A plot of temperature versus time, showing the amount of energy a substance has absorbed with increasing... Read More

Consciousness and Behavior

States of Consciousness Defined either by (1) behavior - ranging from attentive and alert to coma and (2) electrical... Read More

Compound

Definition noun plural: compounds com·pound, ˈkɒmpaʊnd (general) A material made up of two or more parts or... Read More

Hydrophilic

Hydrophilic Definition What does a hydrophile (or hydrophilic molecule) mean? If a molecule is “water-loving”, it is... Read More

Water

Water Definition (1) (biochemistry) A chemical substance, with chemical formula H2O, that is a clear, colorless, odorless,... Read More

Bone matrix

Definition noun The intercellular substance of the bone tissue; that part of bone tissue comprised of organic and inorganic... Read More

Desorption

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

Oxidation

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

Mutagen

Mutagen Definition What is a mutagen? A mutagen is a substance or agent that causes DNA impairment that results in the... Read More

H substances

h substance (Science: haematology) a polysaccharide precursor molecule which is used to make the antigens on the surface of... Read More

Chromatin

Chromatin Definition What is chromatin in a cell? Chromatin is a complex of nucleic acids (e.g. DNA or RNA) and proteins... Read More

Substances

substance The material constituting an organ or body, also called substantia. Origin: L.... Read More

Titrate

titrate A chemistry lab technique used to find out the concentration of a substance (or concentrations of substances) by... Read More

Cell membrane

Definition noun plural: cell membranes ˈmembɹeɪn The cell’s outer membrane made up of a two layers of phospholipids... Read More

Curare

Definition noun (1) Common name for the plant species, Strychnos toxifera (2) The substance containing the alkaloid... Read More

Substrate

Substrate Definition What is a "substrate"? The underlying substances or layers are termed as substrate. The definitions of... Read More

Drug

Definition noun, plural: drugs (1) Any chemical substance administered for therapeutic purposes, diagnosis, prevention of... Read More

Oxidizer

Definition noun, plural: oxidizers Any substance that has the ability to oxidize other substance. Supplement An oxidizing... Read More

Roots

Upon seed germination, the embryo root, called the radicle, grows and develops into the first root. The radicle may thicken... Read More

Solute

Definition noun , plural: solutes (chemistry) 1. a component of a solution: in a solution, the dissolving substance is... Read More

Tissue

Tissue Definition What is tissue in the body? The body tissue is an aggregation of cells that function together and have a... Read More

Oxidant

Definition noun, plural: oxidants (1) Any substance that has the ability to oxidize other substance. (2) A molecule or atom... Read More

Solubility

Definition noun (1) The quantity of a particular substance (solid, liquid, or gas solute) that can dissolve in a particular... Read More

Mediator

Mediator An object or substance by which something is mediated, such as 1. (Science: anatomy) A structure of the nervous... Read More

Universal solvent

Definition noun (1) A substance capable of dissolving all or a large variety of substances. (2) An... Read More

Food

Definition noun (1) A form of nourishing substance that is consumed (2) A substance that provides nourishment (3) A source... Read More

Pinocytosis

Pinocytosis Definition What is pinocytosis?  Pinocytosis is the ingestion of extracellular fluids, i.e. the fluid... Read More

Reductant

A substance capable of bringing about the reduction of another substance as it itself is oxidized; used in photography to... Read More

Modulus

modulus Origin: L, a small measure. See Module. (Science: mathematics) A quantity or coefficient, or constant, which... Read More

Dental enamel

Dental enamel (Science: dentistry) a hard thin translucent layer of calcified substance which envelops and protects the... Read More

Horn

Horn 1. A hard, projecting, and usually pointed organ, growing upon the heads of certain animals, especially. Of the... Read More

Solid

solid 1. Having the constituent parts so compact, or so firmly adhering, as to resist the impression or penetration of other... Read More