Podcast
Questions and Answers
What is the result of Na+ ions diffusing into the postsynaptic neuron?
What is the result of Na+ ions diffusing into the postsynaptic neuron?
- Hyperpolarization of the postsynaptic membrane
- Closure of the ligand-gated ion channels
- Synaptic inhibition
- Depolarization of the postsynaptic membrane (correct)
When do the Na+ ion channels close in the postsynaptic neuron?
When do the Na+ ion channels close in the postsynaptic neuron?
- During the depolarization phase
- While recycling neurotransmitters
- When the ligand-gated ion channels open
- When the neurotransmitters detach from the receptors (correct)
What happens to neurotransmitters after they detach from the receptors in the synaptic cleft?
What happens to neurotransmitters after they detach from the receptors in the synaptic cleft?
- Immediate degradation by specific enzymes (correct)
- Repackaging into synaptic vesicles
- Activation of the Na+ ion channels
- Recycling by direct diffusion into the postsynaptic neuron
What occurs when ligand-gated ion channels in the postsynaptic neuron close?
What occurs when ligand-gated ion channels in the postsynaptic neuron close?
In the mechanism of impulse transmission across synapses, what leads to the generation of an action potential in the postsynaptic neuron?
In the mechanism of impulse transmission across synapses, what leads to the generation of an action potential in the postsynaptic neuron?
What is the main difference between impulse transmission along the axon and across the synapse?
What is the main difference between impulse transmission along the axon and across the synapse?
What type of ion channels are present in the axon for impulse transmission?
What type of ion channels are present in the axon for impulse transmission?
How does cocaine affect the reuptake of dopamine at the synapse?
How does cocaine affect the reuptake of dopamine at the synapse?
Which type of ion channel is present at the postsynaptic membrane for neurotransmitter reception?
Which type of ion channel is present at the postsynaptic membrane for neurotransmitter reception?
In a normal neural communication process, what happens to dopamine after it binds to receptors at the postsynaptic membrane?
In a normal neural communication process, what happens to dopamine after it binds to receptors at the postsynaptic membrane?
What role do neurotransmitters play in impulse transmission across the synapse?
What role do neurotransmitters play in impulse transmission across the synapse?
What is the first step in the mechanism of impulse transmission across a synapse?
What is the first step in the mechanism of impulse transmission across a synapse?
What is the role of calcium ions in the mechanism of impulse transmission across a synapse?
What is the role of calcium ions in the mechanism of impulse transmission across a synapse?
What happens after neurotransmitters are released into the synaptic cleft?
What happens after neurotransmitters are released into the synaptic cleft?
What is the final step in the mechanism of impulse transmission across a synapse?
What is the final step in the mechanism of impulse transmission across a synapse?
Which of the following statements about ligand-gated ion channels is correct?
Which of the following statements about ligand-gated ion channels is correct?
What is the purpose of the synaptic cleft in the mechanism of impulse transmission?
What is the purpose of the synaptic cleft in the mechanism of impulse transmission?
