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Neurotransmitters and Synaptic Transmission

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Neurotransmitters and Synaptic Transmission

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Questions and Answers

What is the primary function of excitatory neurotransmitters?

To initiate an action potential in the postsynaptic neuron (correct)

To facilitate the reuptake of neurotransmitters

To inhibit the transmission of neural impulses

To decrease the probability of an action potential

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 (correct)

They are transported to other neurons

They are stored in the synaptic vesicles for future use

They are released into the bloodstream

What is the term for the process by which neurotransmitters are taken back up by the transmitting neuron?

Neurotransmitter release

Synaptic transmission

Neurotransmitter breakdown

Reuptake (correct)

What is the purpose of receptor sites on the dendrites of the receiving neuron?

To bind with neurotransmitters and initiate a response Signup and view all the answers

What is the result of an inhibitory effect on an action potential?

The action potential is weakened Signup and view all the answers

What is the term for the small fluid-filled gap between two neurons?

Synapse Signup and view all the answers

Which neurotransmitter plays a crucial role in the regulation of pain, stress, and feelings of pleasure?

Endorphins Signup and view all the answers

What is the main function of GABA in the nervous system?

Inhibitory neurotransmitter Signup and view all the answers

How do medications like Lithium work in treating bipolar disorder?

By blocking the release of norepinephrine Signup and view all the answers

What is the primary function of acetylcholine in the nervous system?

Transmission of messages from neurons to muscles Signup and view all the answers

What is the primary effect of excessive glutamate release in the brain?

Seizures and overstimulation Signup and view all the answers

What is the primary function of dopamine in the nervous system?

MOTOR MOVEMENT AND ALERTNESS Signup and view all the answers

What type of neurotransmitter is serotonin?

Inhibitory Signup and view all the answers

What is the primary mechanism of action of selective serotonin reuptake inhibitors (SSRIs)?

Inhibiting the reuptake of serotonin Signup and view all the answers

Which of the following diseases is NOT associated with a serotonin imbalance?

Parkinson's disease Signup and view all the answers

What is the typical fate of serotonin after it has transmitted a signal?

It is reabsorbed by the nerve cells Signup and view all the answers

What is the effect of extremely low levels of serotonin on behavior?

Less inhibition, instability, and impulsivity Signup and view all the answers

What is the region of the brain where serotonin is concentrated?

Midbrain Signup and view all the answers