18 Questions
What is the primary function of excitatory neurotransmitters?
To initiate an action potential in the postsynaptic neuron
What happens to neurotransmitter molecules that do not bind to receptor sites?
They are broken down in the synaptic gap or reabsorbed by the transmitting neuron
What is the term for the process by which neurotransmitters are taken back up by the transmitting neuron?
Reuptake
What is the purpose of receptor sites on the dendrites of the receiving neuron?
To bind with neurotransmitters and initiate a response
What is the result of an inhibitory effect on an action potential?
The action potential is weakened
What is the term for the small fluid-filled gap between two neurons?
Synapse
Which neurotransmitter plays a crucial role in the regulation of pain, stress, and feelings of pleasure?
Endorphins
What is the main function of GABA in the nervous system?
Inhibitory neurotransmitter
How do medications like Lithium work in treating bipolar disorder?
By blocking the release of norepinephrine
What is the primary function of acetylcholine in the nervous system?
Transmission of messages from neurons to muscles
What is the primary effect of excessive glutamate release in the brain?
Seizures and overstimulation
What is the primary function of dopamine in the nervous system?
MOTOR MOVEMENT AND ALERTNESS
What type of neurotransmitter is serotonin?
Inhibitory
What is the primary mechanism of action of selective serotonin reuptake inhibitors (SSRIs)?
Inhibiting the reuptake of serotonin
Which of the following diseases is NOT associated with a serotonin imbalance?
Parkinson's disease
What is the typical fate of serotonin after it has transmitted a signal?
It is reabsorbed by the nerve cells
What is the effect of extremely low levels of serotonin on behavior?
Less inhibition, instability, and impulsivity
What is the region of the brain where serotonin is concentrated?
Midbrain
Understand the role of neurotransmitters in the nervous system, including how they travel across the synaptic gap and interact with receptor sites. Learn about the process of reuptake and the importance of synaptic transmission in neuronal communication.
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