33 results found

Search Results for: neurotransmitter

Dendrite

Dendrite Definition Dendrites are the protoplasmic projections from the neuron cells that receive the electrochemical... Read More

Inhibitory postsynaptic potential

Inhibitory Postsynaptic Potential Definition An inhibitory postsynaptic potential is a type of synaptic potential. It 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

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 terminal

An axon terminal is any of the button-like endings of axons through which axons make synaptic contacts with other nerve... Read More

Vesicle

Definition noun, plural: vesicles (general) A small sac or cyst containing fluid or gas (cell biology) A bubble-like... Read More

Phenylalanine

phenylalanine (Science: amino acid) One of the amino acids which the body cannot manufacture itself, but must acquire from... Read More

Dopamine

Definition noun, plural: dopamines 3,4-dihydroxyphenethylamine (chemical formula: C8H11NO2); a neurotransmitter or a hormone... Read More

Aspartate

What Is Aspartate? Aspartate is an amino acid involved in protein production. Like all other amino acids, it possesses both... Read More

Muscle

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

Muscular system

Muscular System Definition What is the muscular system? The muscular system is a system that includes muscle cells and... Read More

Homeostatic Mechanisms and Cellular Communication

Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory... Read More

Cell signaling

Definition noun The process of communication occurring between the cells and within the cell Supplement Cell signaling is... Read More

Efferent neuron

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

The biology of how the brain forgets

Our brain tends to forget things that we wish we would always remember. And yet, it cannot forget certain things we wish... Read More

Plant sets off “SOS” for plant defense when it gets hurt

When herbivore, such as an insect, nibbles a plant leaf, the plant sets off an "SOS" or distress signal as one of the... Read More

Autocrine signaling

Autocrine Signaling Definition What is autocrine signaling? Autocrine signaling is a type of cell signaling wherein a cell... Read More

Nitrogen

Definition noun plural: nitrogens ni·tro·gen, ˈnɐɪtʰɹədʒən (biochemistry) A colorless, odorless, gaseous... Read More

Neuromuscular junction

Definition noun A chemical synapse between a motoneuron and a muscle fiber, through which a signal is transmitted that... Read More

Sarcolemma

Sarcolemma Definition What is the sarcolemma? It is the thin, transparent, extensible plasma membrane of the muscle cell.... Read More

Endoplasmic reticulum

Endoplasmic Reticulum Definition The endoplasmic reticulum is a membrane-bound organelle in cells of eukaryotic cells... Read More

Parasympathetic nervous system

Definition noun A division of the (vertebrate) autonomic nervous system whose physiological effects are mostly in opposition... Read More

Ligand gated ion channels

Ligand gated ion channel a transmembrane ion channel whose permeability is increased by the binding of a specific ligand,... Read More

Neurohormone

Definition noun, plural: neurohormones Any of the various hormones secreted by neuroendocrine cells Supplement A... Read More

Adenosine

Definition noun plural: adenosines a·den·o·sine, əˈdɛn əˌsin A purine nucleoside that has adenine bound to a... Read More

Presynaptic cell

presynaptic cell (Science: physiology) In a chemical synapse, the cell that releases neurotransmitter that will stimulate... Read More

Postsynaptic cell

postsynaptic cell In a chemical synapse, the cell that receives a signal (binds neurotransmitter) from the presynaptic cell... Read More

Axon

What Is Axon? An axon is a thin, long fiber of a nerve cell (or neuron). It transmits electrical impulses from the cell... Read More

Nucleoside

Nucleoside Definition A nucleoside is a nitrogenous base (purine or pyrimidine) bound to a pentose sugar ribose or... Read More

Sympathetic nervous system

Definition noun A division of the (vertebrate) autonomic nervous system that is chiefly involved in producing an immediate... Read More

Moiety

Moiety Definition What is a moiety? Moiety (plural: moieties), in general, refers to the half or one of the two... Read More

FAAH-OUT mutation for a life of no pain – No FAAH, no pain

A Scottish woman claims that she has not experienced pain over some supposedly painful conditions, like a severe joint... Read More