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Unit 3 Notes pt. 2: Neurotransmitters

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Michael Thrower

on 20 September 2015

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Transcript of Unit 3 Notes pt. 2: Neurotransmitters

These are chemical messengers that traverse the synaptic gaps, they influence whether or not a neuron will fire
Neurons are separated by the synaptic gap or cleft
- When the action potential reaches the end of the axon, it triggers the release of chemical messengers call neurotransmitters
Acetylcholine (ACH)
ACH enables thought, learning, and memory it is also involved with initiating movement
- Blocking ACH will lead to paralysis
- Flooding ACH will lead to violent muscle convulsions (Black widow spider bite)
- A lack of ACH production is linked to Alzheimer's Disease, a disease associated with the inablity to recall memory
Endorphins are a family of chemicals that will elicit a sense of well-being or euphoria.

They are often released during excersize, excitement, pain, sexual activity, and even eating some types of food like chocolate.
Dopamine is associated with feelings of pleasure and satisfaction. It is also associated with addiction, movement, and motivation.
- Lack of Dopamine has been linked to Parkinson's Disease
- Too much Dopamine has been linked to Schizophrenia
These inhibit a neurotransmitters release
Ex: Caffeine, Benadryl, and PCP
These cause neurons to fire oftentimes realeasing too many neurotransmitters
Ex: Cannabis, Nicotine
How do Neurons communicate with one another?
Types of Neurotransmitters
How do drugs influence neurotransmitters?
Unit 3 Notes pt. 2: Neurotransmitters
From depression and euphoria to hunger and thinking, neurotransmitters play an important role in how we feel and act.
Serotonin has been linked to feelings of well-being and happiness, but it is mostly connected with the sleep cycle and intestinal regulation
- Low levels of Serotonin have been linked to depression and anxiety
- Many anti-depressants attempt to change serotonin levels in the brain
- Exercise and exposure to light can also increase serotonin levels
Other Neurotransmitters:
: affects awareness and works with Epinephrine to initiate the "flight or fight" response, low levels are linked to ADHD
: or adrenaline, produced in high stress or exiting situations, provides a phyiscal boost and heightened awareness (Epi Pens)
GABA (gamma-aminobutyric acid)
: an inhibiter, it helps with mental focus and calming down excited neurons, raising levels can have a calming effect while low levels are linked to anxiety and epilepsy
: involved with cognitive functions like learning and memory, it also aids in development; too much can lead to migraines or seizures; MSG's are found in many foods
Drugs can be...
Reuptake Inhibitors
These block reuptake causing a flood in the synaptic gap
Ex: Cocaine
Cool Website....
Let's check out the Mouse Party here:

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