Search Results for: passage
Alimentary canal
Definition of Alimentary canal What is the alimentary canal? The alimentary canal is a muscular hollow continuous tubular... Read More
Permeability
Permeability Definition What is permeability? In earth science, its definition is this: "the ability of any material such... Read More
Sympatric speciation
Speciation is a process of evolution through which two different existing populations evolve and a distinct species form. It... 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
Semilunar valve
The human heart structure consists of heart chambers (2 atria and 2 ventricles) that differ functionally from each other.... Read More
Nuclear pore complex
Definition noun plural: nuclear pore complexes ˈnu kli ər, pɔː ˈkɒmplɛks A complex of nucleoporins resulting in the... Read More
Dead Man Walking
Dead Man Walking: Wade Davis and the Secret of the Zombie Poison By Patrick D. Hahn Accepted on September 4, 2007 Twenty... Read More
Circulation
Blood Blood is composed of a liquid, plasma, and blood cells such as erythrocytes (red blood cells,) leukocytes (white... Read More
Nuclear envelope
Definition noun plural: nuclear envelopes nu·cle·ar en·ve·lope, ˈn(j)ukliɚ ˈɛn.və.ləʊp The two layered membrane... Read More
Nuclear pore
Definition noun plural: nuclear pores ˈnu kli ər, pɔː Any of the many perforations on the nucleus as a result of the... Read More
Blood-brain barrier
Definition noun A semipermeable membrane that serves as a selective barrier separating the circulating blood and the... Read More
Electrical synapse
Definition noun A form of synapse between two apposed neurons in which nerve impulse transmission is rapid and occurs by... 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
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
Kidney calices
Definition noun, singular: kidney calyx Funnel-shaped structures that allow passage of the urine from the ducts of the renal... Read More
Sturms conoid
Sturm's conoid In optics, the pattern of rays formed after passage through a spherocylindrical... Read More
Semipermeable membrane
Definition noun A membrane that is selectively permeable, i.e. being permeable to only certain molecules and not to all... Read More
Osteoporosis
Definition noun, plural: osteoporoses A disease of bone in which the bones become extremely porous and are subject to... Read More
Scalene hiatus
scalene hiatus triangular gap bounded by the scalenus anterior and scalenus medius muscles and the first rib to which the... Read More
Amphipathic
Amphipathic is a word used to describe a chemical compound containing both polar (water-soluble) and nonpolar (not... Read More
Anastomosis
Definition noun, plural: anastomoses (1) Interconnection between parts of a branching system forming a network, as in leaf... Read More
