15 Questions
Which type of receptors are ligand-gated ion channels composed of subunits?
Ionotropic receptors
Which neurotransmitter tends to open chloride ion channels?
GABA
What is the major excitatory neurotransmitter in the brain?
Glutamate
What is the major inhibitory neurotransmitter in the brain?
GABA
What can lead to disorders if mutations occur in genes encoding proteins in the postsynaptic density?
Changes to the postsynaptic density
Which subunits make up G proteins?
Alpha, beta, and gamma
What happens when the neurotransmitter binds to the G protein?
The G protein splits and the alpha subunit moves to bind to effect proteins or ion channels
What do second messenger systems do?
Both A and B
What do stimulatory G proteins do?
Activate second messenger cascades
What can alter neuronal communication?
Both A and B
Which of the following is true about the resting membrane potential of a neuron?
It is -70 millivolts
What is the role of neurotransmitters in neural communication?
They are released into the synapse to pass signals from one neuron to the next
What is the function of potassium channels in a neuron at rest?
They allow potassium to flow in and out along the electrical and concentration gradients
What is the difference between electrical and concentration gradients in a neuron?
Electrical gradient is the difference in electrical charge between two adjacent areas, while concentration gradient is the difference in concentration of ions between two adjacent areas
What is the role of sodium-potassium pumps in a neuron?
They restore chemical and electrical gradients
Test your knowledge on synaptic communication and neuropharmacology! Learn about the components of the presynaptic terminal and postsynaptic density, the role of receptors in signal translation, and the impact of gene mutations on synaptic disorders. Gain insights into ionotropic and metabotropic receptors in this informative quiz.
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