The Neuron
What sends messages towards the cell body?
Dendrites
At rest, is the inside of a neuron positively or negatively charged?
Negative
What is released from the pre-synaptic neuron and binds to receptor sites on the postsynaptic neuron?
Neurotransmitters
What nervous system is activated when adrenaline and noradrenaline are released?
The sympathetic nervous system
Name the three classifications of drugs
- depressant
- stimulant
- hallucinogen
What is the soma also known as?
The cell body
What is the name of the electrical signal that a neuron fires?
Action Potential
What model is used to describe how the neurotransmitter binds to receptor sites?
The lock-and-key model
What effect do adrenaline and noradrenaline have on thoughts?
1 of the following:
- increased rate of thoughts
- increased attention
- increased memory
A depressant
What insulates the axon?
The myelin sheath
How does the body communicate stronger messages?
What transports and releases the neurotransmitter?
Vesicles
What effect to adrenaline and noradrenaline have on feelings?
1 of the following:
- feelings of fear/ anxiety/ panic
- feelings of paranoia
True or False: The nervous system responds to drug us by releasing less dopamine and reducing the number of dopamine receptor sites.
- this leads to addiction as the body relies on the drug for dopamine
What type of cell is a neuron?
A nerve cell
- 70mV
What is the name of the process in which neurotransmitters are recycled and transported back to the presynaptic terminal?
Reuptake
What effect do adrenaline and noradrenaline have on behaviour?
1 of the following:
- fleeing behaviour
- aggressive behaviour
What does serotonin regulate?
1 of the following:
- mood
- anxiety
- appetite
- sleep cycle
- body temperature
Define a neuron
A specialised nerve cell which carries messages through an electrochemical process.
At what voltage will the neuron fire an action potential?
-55 mV
True or False: the presynaptic and postsynaptic neuron never touch.
True
True or false: noradrenaline is a hormone
False
noradrenaline is a neurotransmitter (remember they both start with n), adrenaline is a hormone
Define psychoactive drug
A chemical substance that affects the brain, therefore, impacting the wat a person thinks and feels, and consequently the way they behave.