396 results found

Search Results for: substance

Substance

Substance Definition What is a substance? The word substance finds varied usages in different science fields. In general... 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

Agonist

What is an Agonist? In biology, an "agonist" is the "doer of an action". Opposite of it is the antagonist, which opposes... Read More

Ground substance

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

Threshold substance

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

BIOACCUMULATION

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

Bone matrix

Bone Matrix Definition Bone matrix refers to the matrix component of bone tissue. It provides the structural framework and... Read More

Oxidizer

An oxidizer is a substance that facilitates oxidation in a chemical reaction by accepting electrons from another substance.... Read More

Phagocytosis

Phagocytosis Definition Phagocytosis is a basic physiological cellular process wherein a cell ingests a solid particle... Read More

Bolus injection

A bolus injection is the act of administering a dose of medication or substance directly into the bloodstream by injection.... 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

Consciousness and Behavior

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

Water

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

Desorption

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

Hydrophilic

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

Compound

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

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

Cell membrane

Cell Membrane Definition Just like any non-living body possesses a plastic or paper packaging material that keeps 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

Titrate

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

Matrix

Bodies of living organisms are organized structures. These are organized in a hierarchy of organ systems, organs, tissues,... Read More

Curare

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

Oxidant

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

Substrate

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

Drug

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

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

Solute

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

Agar

What Is Agar? Agar, also called agar agar, is a natural gelling agent derived from seaweed (specifically algae belonging to... Read More

Dense connective tissue

Definition noun A type of connective tissue that contains chiefly of collagen fibers (type I collagen) relative to the... Read More

Vapor

vapor To send off in vapor, or as if in vapor; as, to vapor away a heated fluid. Alternative forms: vapour He'd laugh to see... Read More

Hyaline cartilage

Hyaline Cartilage Definition Before we define hyaline cartilage, let us understand what cartilage is. What is cartilage? Is... Read More

Endocytosis

Endocytosis Definition What is endocytosis in biology? Endocytosis is a cellular process by which a cell internalizes any... Read More