when it is released by a neuron

when it is released by a neuron - nervous system when it is...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
nervous system * when it is released by a neuron. Types of Neurotransmitters Three major categories * Acetylcholine * Amino Acids * GABA * Glycine * Aspartic acid * Glutamic acid * Biogenic amines (monoamines) * Catecholamines * epinephrine * norepinephrine * dopamine * Serotonin * Hisamine * Neuropeptides Synapse Excitatory Cholinergic synapse * employs acetylcholine as its neurotransmitter (can be excitatory or inhibitory) * opens Na+ channels Inhibitory GABA-ergic synapse * opens Cl- channels causing a hyperpolarization Adrenergic excitatory synapse * employs norepinephrine * acts through second messenger systems such as cyclic AMP * the receptor is not an ion gate but an integral protein associated with G protein Inactivation of Neurotransmitters The action of neurotransmitters can be stopped by four different mechanisms 1. Diffusion: the neurotransmitter drifts away, out of the synaptic cleft where it can no longer act on a receptor.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/30/2012 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

Page1 / 2

when it is released by a neuron - nervous system when it is...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online