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Post on 01-Jan-2016
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Unit 2: Biological LOA
Using one or more examples, explain effects of neurotransmission on human behaviour
Introduction to neurons and neurotransmitters
Today’s learning outcome
Unit 2: Biological LOA
It is estimated that there are between __________ neurons in nervous system and neurons make ___________ connections with each other.
Neurons send ___________ to the brain so that people can respond to stimuli either from environment or from internal changes in body. This is called __________.
The parts of neurons that send messages are the ____________, and the parts of neurons that receive messages are the ______________.
When an electrical impulse travels down the axon of the neuron, it releases _________ which then cross the gap between two neurons.
The space between the dendrites of one neuron and the axon of another neuron is called the _________________.
In the year __________, a man named ___________ first discovered neurotransmitters during an experiment with frog hearts.
Neurotransmitters are the body’s natural _____________. They transmit information from one ___________ to another.
Once the message is passed on, neurotransmitters are either broken down or reabsorbed by terminal buttons. This is called _______.
Neurotransmitters shown to have a range of effects on ________ including ________ and ___________.
Unit 2: Biological LOA
Nerve cells, called neurons= one of building blocks of behaviour
Estimated that there are between 10 and 100 billion neurons in nervous system and neurons make 13 trillion connections with each other
Neurons
Unit 2: Biological LOA
Neurons send electrochemical messages to brain so people can respond to stimuli either from environment or from internal changes in body
The method by which these messages are sent is called NEUROTRANSMISSION
Neurons
Unit 2: Biological LOA
In the year 1921, a man named Otto Loewi first discovered neurotransmitters during an experiment with two frog hearts.
He shared the Nobel Prize with researcher Henry Dale in 1936 for their findings on neurotransmission.
A brief history...
Dendrite –receives message Axon – sends message
Myelin sheath – insulates axon, speeding up transmission
*Dendrites detect, axons announce*
Unit 2: Biological LOA
When an electrical impulse travels down the axon of the neuron, it releases neurotransmitters which then cross the gap between two neurons
This gap is called a synapse
Neurotransmission
Unit 2: Biological LOA
Body’s natural chemical messengers
Transmits information from one neuron to another
Stored in the neurons’ terminal buttons
After crossing the synapse, neurotransmitters fit into receptor sites on the post-synaptic membrane, like a key in a lock
Once the message is passed on, neurotransmitters are either broken down or reabsorbed by terminal buttons. This is called reuptake.
So what IS a Neurotransmitter?
Unit 2: Biological LOA
Neurotransmitters shown to have a range of effects on human behaviour
Neurotransmission lies beneath behaviours as varied as mood, memory, sexual arousal and mental illness
Neurotransmitters and behaviour
Unit 2: Biological LOA
Create and label your own diagram for the information flow through the neuron
This can either be a simple flow chart or an illustration of a neuron
Today’s Journal Entry
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