50 results found

Search Results for: nerve impulse

Nerve impulse

Definition noun (1) The movement of action potential along a nerve fiber in response to a stimulus (such as touch, pain,... Read More

Afferent Nerve

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

Nervous tissue

Definition noun A type of animal tissue comprised principally of nerve cells and neuroglia cells Supplement The four... Read More

Efferent nerve

Definition noun, plural: efferent nerves The type of nerve that carries nerve impulses away from the central nervous system... 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

Axon

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

Nerve cell

Definition noun, plural: nerve cells A neuron; a cell of the nervous system that transmits nerve impulses Supplement Nerve... Read More

Decremental conduction

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

Neuron

Definition noun, plural: neurons An excitable cell that has specialized cell parts (such as soma, dendrites and axons),... Read More

Efferent neuron

Definition noun, plural: efferent neurons A neuron with an axon that carries nerve impulses peripherally, and innervates... Read More

Olfactory nerve

Definition noun, plural: olfactory nerves The cranial nerve comprised of sensory nerve fibers that carry impulses for 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

Homeostasis

Homeostasis is the tendency not to stray from the range of favorable or ideal internal conditions. Such conditions must be... Read More

Action potential

Definition noun A short-term change in the electrical potential on the surface of a cell (e.g. a nerve cell or muscle cell)... 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

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

Sensory neuron

Definition noun, plural: sensory neurons A type of neuron that transmits sensory nerve impulses Supplement The neurons are... Read More

Effector

Definition noun, plural: effectors (biochemistry) A molecule that binds to a protein and affects the function of that... Read More

Afferent neuron

Definition noun, plural: afferent neurons A type of neuron that detects stimulus from the periphery and relays nerve... Read More

Reflex

Definition noun, plural: reflexes (physiology) An innate, immediate involuntary action to a stimulus without prior conscious... Read More

Cannons theory

Definition noun A theory on emotion formulated by Walter Cannon in 1929 which states that the diencephalon, consisting of... Read More

Hypothalamic theory

Definition noun A theory on emotion formulated by Walter Cannon in 1929 which states that the diencephalon, consisting of... Read More

Tropomyosin

Definition noun A long protein strand composed of two fully alpha helical chains in a coiled-coil dimmer, and binds along... Read More

Excitatory synapse

Definition noun (1) A synapse in which the nerve impulse in a presynaptic cell tend to increase the probability of the... Read More

Interneuron

Definition noun, plural: interneurons (1) Any local circuit neuron of the central nervous system that relays impulses... Read More

Unmyelinated nerve

Definition noun A nerve that is bare or without the myelin sheath around the axon. Supplement The unmyelinated nerve... Read More

Nervous system

Definition noun The organ system responsible mainly for coordination of bodily reactions, organ monitoring, and information... Read More

Impulse

Impulse 1. The act of impelling, or driving onward with sudden force; impulsion; especially, force so communicated as to... Read More

Synapse

Definition noun, plural: synapses A specialized structure or junction that allows cell to cell communication. verb (1) To... Read More

Depolarization

Definition noun The deprivation or the process of neutralization of polarity, as that in nerve... Read More

Muscle tone

Definition noun (1) The muscle in a steady partially contracted state caused by the successive flow of nerve... Read More

Dendrite

Definition noun, plural: dendrites (1) Any of the threadlike extensions or projections of the cytoplasm of a neuron;... Read More

Sodium-potassium pump

Definition noun A transmembrane ATPase enzyme located in the plasma membrane of animal cells, and functions by pumping... Read More

Phosphorylation

Phosphorylation Definition We can define phosphorylation as a biochemical process in which a phosphate molecule is added to... Read More

Chemical synapse

Definition noun, plural: chemical synapses A specialized cell-to-cell junction where nerve impulse is transmitted in one... Read More

Propagate

Definition verb (1) To cause an organism to reproduce or breed, especially by natural means. (2) To transmit or spread (e.g.... Read More

Tonus

Definition noun (1) Tonicity of muscle. (2) The muscle in a steady partially contracted state caused by the successive flow... Read More

Smooth endoplasmic reticulum

Smooth Endoplasmic Reticulum Definition Smooth endoplasmic reticulum (sER) is (a part of) endoplasmic reticulum that is... Read More

Muscle tonus

Definition noun (1) The muscle in a steady partially contracted state caused by the successive flow of nerve... Read More