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ppt
ppt

... •triggered by inhibitory neurotransmitters •open ligand-gated K+ channels or Cl- channels •allows K+ to flow out of the cell or Cl- to flow inside the cell •causing a slight hyperpolarization of the postsynaptic cell •moves the postsynaptic cell further from firing an action potential ...
signal transduction the ligand-gated ion channels
signal transduction the ligand-gated ion channels

... propagated unidirectionally) and make specific connections with postsynaptic target cells (i.e networks are not random) • At the end of the axon, voltage changes trigger the release of neurotransmitters • Drug selectivity is based on the fact that different neuronal pathways utilize different neurot ...
Document
Document

... 1. Depolarization of the presynaptic cell membrane by an action potential pushes a wave (Na+ ions rushing in/K+ ions rushing out) along the axon to the presynaptic terminal. 2. This opens voltage–gated Ca2+ channels in the membrane, triggering an influx of Ca2+ into the presynaptic cell. 3. The elev ...
Nervous System
Nervous System

... • Nervous system uses ions (Na+, K+, Cl-, Ca++) to send signals from one neuron to another ...
UNIT 3A: Biological Bases of Behavior – Neural Processing and the
UNIT 3A: Biological Bases of Behavior – Neural Processing and the

... Drugs and other chemicals affect brain chemistry at synapses, often by either amplifying or blocking a neurotransmitter’s activity a. Agonists are molecules that are similar enough to a neurotransmitter to bind to its receptor and mimic its effects i. Some opiate drugs are agonists and produce a tem ...
AP Psychology - Ms. Hofmann`s Website
AP Psychology - Ms. Hofmann`s Website

... Peripheral Nervous system on this website. Read the two scenarios on the right that begin with, “It’s a nice sunny day…” Draw yourself in each of these situations and in the caption explain what is going on in your body. ...
Biopsychology 2012 – sec 002
Biopsychology 2012 – sec 002

... - degeneration of Substantia Nigra in midbrain = Parkinson’s disease; - schizophrenia ii. Norepinephrine and epinephrine (adrenaline): - released by sympathetic nervous system and adrenal glands; - control alertness/wakefulness; alarm reactions. B. Indolamines: Serotonin (precursor: tryptophan): - c ...
Neural Pathways
Neural Pathways

... knob, neurotransmitters are released presynaptic into the synaptic cleft neuron -from vesicles ...
Neuron_Exercises_HPsychAY10
Neuron_Exercises_HPsychAY10

... You will do this by engaging in a series of ten-minute projects with a partner. You will complete the following “stations” and/or projects in whatever order seems best to you: 1. Create a diagram of the structure of the neuron using construction paper and crayons or pencils. 2. Answer the following ...
Module 4 Neural and Hormonal Systems
Module 4 Neural and Hormonal Systems

... recieving neuron and excite or inhibit a new action potential. The sender neuron reabsorbs excess neurotransmitters. This is reuptake. ...
Nervous System
Nervous System

... • Nervous system uses ions (Na+, K+, Cl-, Ca++) to send signals from one neuron to another ...
The Nervous System
The Nervous System

... – The postsynaptic membrane is excited or inhibited. • Depending upon the kind of neurotransmitter and the kind of membrane receptors, there are two possible outcomes for postsynaptic membrane – Excitatory postsynaptic potential • Na+ gates open; membrane becomes depolarized; action potential is gen ...
Mechanism of synaptic actions and neuromodulation
Mechanism of synaptic actions and neuromodulation

... Jessell TM, Kandel ER (1993) Synaptic transmission - a bidirectional and self-modifiable form of cell-cell communication Cell 72S 1-30  Whittaker, V. (1990) The contribution of drugs and toxins to understanding of cholinergic function Trends Pharm Science 11: 8-13 (in the photocopy collection) ...
Chap 28 – Nervous System Part 2 – Synaptic Transmission
Chap 28 – Nervous System Part 2 – Synaptic Transmission

... Synaptic terminals Dendrites ...
Learn about synapses
Learn about synapses

... At the synaptic terminal (the presynaptic ending), an electrical impulse will trigger the migration of vesicles (the red dots in the figure to the left) containing neurotransmitters toward the presynaptic membrane. The vesicle membrane will fuse with the presynaptic membrane releasing the neurotrans ...
CNS Introduction
CNS Introduction

... These act over a longer time scale than neuromodulators to regulate the growth and morphology of neurons. The binding of neurotrophic factors to their receptors generally promotes receptor dimerization and protein tyrosine kinase activity in the intracellular domains of the receptors. ...
electrochemical impulse - Glebe
electrochemical impulse - Glebe

... o E.g. warm water = low frequency, hot water = high frequency 2. Different neurons have different thresholds o E.g. water at 40°C will cause one neuron to reach threshold level, but water at 60°C may cause two or more o Brain distinguishes between neural impulses Synaptic Transmission  Neurons can ...
Neuron Function notes
Neuron Function notes

... SEQUENCE OF EVENTS [AT CHOLINERGIC SYNAPSE(acetylcholine is neurotransmitter)] 1. Arriving AP depoliarizes the synaptic knob and the presynaptic membrane 2. Ca+2 ions enter the cytoplasm of the synaptic knob – membrane channels in synaptic vesicles – release Ach 3. Ach diffuses across synaptic cleft ...
General_Psychology_files/Chapter Two Part One2014 - K-Dub
General_Psychology_files/Chapter Two Part One2014 - K-Dub

...  Like a gun, it either fires or it doesn’t; more stimulation does nothing.  This is known as the “all-ornone” response. ...
Mind Is Matter
Mind Is Matter

... Nodes of Ranvier 3. Describe the direction of communication within a neuron and between two neurons. 4. Identify the various structures with the synaptic cleft (synapse) from a diagram. Describe the function of each structure. Presynaptic membrane Postsynaptic membrane Neurotransmitter Vesicle Recep ...
Chapter Two Part One - K-Dub
Chapter Two Part One - K-Dub

...  Like a gun, it either fires or it doesn’t; more stimulation does nothing.  This is known as the “all-ornone” response. ...
Chapter Two Part One PPT - K-Dub
Chapter Two Part One PPT - K-Dub

...  Like a gun, it either fires or it doesn’t; more stimulation does nothing.  This is known as the “all-ornone” response. ...
Assignment 1 - Gordon State College
Assignment 1 - Gordon State College

... 31. The ___________________ is known as the “brain’s sensory switchboard” because information from all the senses except smell goes through here to be relayed to the appropriate part of the brain. 32. In the limbic system, the _______________________ plays a large role in the ability to form and pro ...
File - Mrs. LeCompte
File - Mrs. LeCompte

... GABA (Gamma Amino Butyric Acid) = important inhibitory neurotransmitter o Prevents signals from continuing to be sent or from being sent in the wrong direction o Regulates norepinephrine, dopamine, and serotonin ...
1.nerve notes
1.nerve notes

... Drugs affect the nerves at the synapse - They act like neurotransmitters hitting the receptors. - They block the enzyme from destroying the neurotransmitter after the message has been sent, so they keep sending the message The receptors get worn out & stop working (this is addiction) Addiction is w ...
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Neurotransmitter

Neurotransmitters are endogenous chemicals that enable neurotransmission. They transmit signals across a chemical synapse, such as in a neuromuscular junction, from one neuron (nerve cell) to another ""target"" neuron, muscle cell, or gland cell. Neurotransmitters are released from synaptic vesicles in synapses into the synaptic cleft, where they are received by receptors on other synapses. Many neurotransmitters are synthesized from simple and plentiful precursors such as amino acids, which are readily available from the diet and only require a small number of biosynthetic steps to convert them. Neurotransmitters play a major role in shaping everyday life and functions. Their exact numbers are unknown but more than 100 chemical messengers have been identified.
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