Podcast
Questions and Answers
What is the primary factor affecting the speed of action potential?
What is the primary factor affecting the speed of action potential?
- Myelination (correct)
- Neurotransmitter concentration
- Synaptic vesicle release
- Resting potential
Which type of potential makes it harder to initiate a neural message?
Which type of potential makes it harder to initiate a neural message?
- Depolarizing graded potential
- Inhibitory graded potential (correct)
- Spatial summation
- Temporal summation
What triggers the opening of calcium channels in the synaptic bulb during a chemical synapse?
What triggers the opening of calcium channels in the synaptic bulb during a chemical synapse?
- Action potential amplitude
- Protein in postsynaptic membrane
- Release of neurotransmitter
- Change in resting potential (correct)
Which ion is involved in a positive feedback loop during the generation of graded potential?
Which ion is involved in a positive feedback loop during the generation of graded potential?
How does the amplitude of an action potential change?
How does the amplitude of an action potential change?
Study Notes
Factors Affecting Action Potential
- The primary factor affecting the speed of action potential is the myelination of the axon.
Types of Potentials
- A hyperpolarizing potential makes it harder to initiate a neural message.
Chemical Synapse
- The opening of calcium channels in the synaptic bulb during a chemical synapse is triggered by an action potential.
Graded Potential
- Potassium ions are involved in a positive feedback loop during the generation of graded potential.
Action Potential Amplitude
- The amplitude of an action potential remains constant, it does not change.
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Description
Test your knowledge of graded potentials and their impact on neuronal communication with this quiz. Explore topics such as hyperpolarization, depolarization, inhibitory graded potentials, and the mechanisms of sodium and potassium in feedback loops. Dive into concepts of summation, including temporal and spatial, and enhance your understanding of the role of sodium channels in local depolarization.
