Podcast
Questions and Answers
What is the primary condition required for the generation of an action potential?
What is the primary condition required for the generation of an action potential?
- Presence of chemically regulated gated channels
- Presence of voltage-gated Na+ and K+ channels and a strong enough graded potential (correct)
- Mechanical stimulation of the axon
- Depolarization of the axon hillock to a threshold of -60mV
Which type of gated channel is responsible for the refractory period in a neuron?
Which type of gated channel is responsible for the refractory period in a neuron?
- Mechanically regulated gated channels
- Voltage-gated K+ channels (correct)
- Chemically regulated gated channels
- Voltage-regulated gated channels
What is the direction of signal propagation in a neuron?
What is the direction of signal propagation in a neuron?
- From the dendrites to the cell body
- From the cell body to the dendrites
- From the axon hillock to the synaptic knob (correct)
- From the synaptic knob to the axon hillock
What is the effect of a neurotransmitter that affects K+ channels on the neuronal membrane potential?
What is the effect of a neurotransmitter that affects K+ channels on the neuronal membrane potential?
What is the primary factor that determines the degree of depolarization in a neuron?
What is the primary factor that determines the degree of depolarization in a neuron?
What is the minimum strength of stimulus required to generate an action potential?
What is the minimum strength of stimulus required to generate an action potential?
During the absolute refractory period, what is the state of the Na+ ion channels?
During the absolute refractory period, what is the state of the Na+ ion channels?
What is the purpose of the refractory period in signal propagation?
What is the purpose of the refractory period in signal propagation?
What is the change in potential difference during the absolute refractory period?
What is the change in potential difference during the absolute refractory period?
What is the role of the Na+K+ pump in signal propagation?
What is the role of the Na+K+ pump in signal propagation?
What is the mechanism of continuous propagation in unmyelinated neurones?
What is the mechanism of continuous propagation in unmyelinated neurones?
What is the primary mechanism of saltatory conduction in myelinated neurons?
What is the primary mechanism of saltatory conduction in myelinated neurons?
What is the average conduction velocity of somatic motor neurons in humans?
What is the average conduction velocity of somatic motor neurons in humans?
Which type of synapse allows for bidirectional signal transmission?
Which type of synapse allows for bidirectional signal transmission?
What is the name of the disease that results from the immune system attacking the myelin sheath?
What is the name of the disease that results from the immune system attacking the myelin sheath?
What is the primary function of dopamine in the nervous system?
What is the primary function of dopamine in the nervous system?
What is the term for the period during which a neuron is unable to generate another action potential?
What is the term for the period during which a neuron is unable to generate another action potential?
