51 results found

Search Results for: conduction

Decremental conduction

Definition noun The impaired conduction in a portion of a fiber due to progressively lessening response of the unexcited... Read More

Air conduction

Air conduction in relation to hearing, the transmission of sound to the inner ear through the external Auditory Canal and... Read More

Nerve conduction

nerve conduction The transmission of an impulse along a nerve... Read More

Conduction

Conduction (Science: physics, physiology) The transfer of sound waves, heat, nervous impulses or electricity. Origin: L.... Read More

Xylem

Xylem Definition Xylem is defined as a plant tissue that transfers water and nutrients from roots to all over the plant... Read More

Plant Tissues

Plants are composed of three major organ groups: roots, stems, and leaves. As we know from other areas of biology, these... Read More

Myocardium

Myocardium Definition What is the myocardium of the heart?  It is the muscular middle layer of the heart that is... Read More

Neural Control Mechanisms

Nerve cells called neurons generate electric signals that pass from one end of the cell to another and release chemical... Read More

Tracheary elements

Definition noun (botany) The principal conductive cells of the xylem associated with the conduction of water and minerals... Read More

Regulation of Organic Metabolism, Growth and Energy Balance

Organic Metabolism Events of Absorptive and Post-absorptive States. The absorptive state is the period during which... Read More

Neurophysiology

Definition noun A branch of neuroscience that is concerned with the physiology of the nervous system Supplement Neuroscience... Read More

Metaxylem

Definition noun The part of the primary xylem that is last to develop from the procambium, and characterized by weblike or... Read More

Hardwood

Definition noun (botany) The wood (secondary xylem) of an angiosperm tree Supplement Vascular plants, e.g. gymnosperms and... Read More

Stannius ligature

Definition noun A ligature done in between the sinus venosus and the atrium or around the atrioventricular junction of an... Read More

Xylem vessel

Definition noun, plural: xylem vessels (botany) One of the tracheary elements of xylem that is characterized by being made... Read More

Sapwood

Definition noun The white, softer, outermost wood that has not yet become heartwood and is involved in conducting... Read More

Xylem fiber

Definition noun, plural: xylem fibers Any of the fibers made up of dead sclerenchyma cells in between the xylem vessels... Read More

Vac

VAC (Science: abbreviation) ventriculoatrial... Read More

Blockade

Blockade 1. Intravenous injection of large amounts of colloidal dyes or other substances whereby the reaction of the... Read More

Myelinated neuron

Definition noun A neuron in which the axon is enveloped by a layer of Schwann cell membranes (sheath). Supplement The myelin... Read More

Unmyelinated neuron

Definition noun A neuron in which there is no myelin sheath surrounding the axon. Supplement The unmyelinated neuron... Read More

Xylem parenchyma

Definition noun Parenchyma cells in the xylem tissue and are involved mainly in the storage of carbohydrates, oils, and... Read More

Phloem parenchyma

Definition noun The parenchyma cells in between the sieve tubes of the phloem, and functions primarily for food... Read More

Metaphloem

Definition noun, plural: metaphloems A component of the primary phloem that develops often following the differentiation of... Read More

Secondary xylem

Definition noun, plural: secondary xylems The xylem formed as a result of the secondary growth from the vascular... Read More

Austin disease

Definition noun A type of lysosomal storage disease that is often caused by a deficiency in multiple sulfatase enzymes, or... 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

Ganglion

Ganglia Definition What are ganglia? To simply define ganglia in biology, it is the structure of an oval shape that... Read More

Muscle

Muscle cells are specialized to generate force and movement. There are three types of muscle tissue: (1) skeletal muscle,... Read More

Circulation

Blood Blood is composed of a liquid, plasma, and blood cells such as erythrocytes (red blood cells,) leukocytes (white... Read More

Protoxylem

Definition noun The first xylem to develop from the procambium, and characterized by narrow tracheary elements with annular,... Read More

Streptolysin O

Definition noun An oxygen-labile, immunogenic hemolysin produced by or derived from some strains of... Read More

Primary xylem

Definition noun, plural: primary xylems The xylem formed during the primary growth from procambium of root and shoot... Read More

Vascular plants

Definition of Vascular plants The term 'vascular' is derived from the Latin word vāsculum, vās, meaning "a container and... Read More

Afferent Nerve

Afferent Nerve Definition The word ‘aferent’ means "steering or conducting something towards a destination". The... Read More

Axon

Definition noun, plural: axons A long slender fibre of a neuron and is responsible for conducting nerve impulses away from... Read More

Heartwood

Definition noun The central wood in a branch or stem characterized by being composed of dead cells, more resistant to decay,... Read More

Af

Af --> atrial fibrillation (Science: cardiology) a condition where there is disorganised electrical conduction in the... Read More

Thermopile

thermopile (Science: physics) An instrument of extreme sensibility, used to determine slight differences and degrees of... Read More

Myelinated nerve

Definition noun A nerve cell in which the axon is surrounded by a layer of Schwann cell membranes of myelin... Read More