Podcast
Questions and Answers
What is the main difference between myelinated and unmyelinated nerve fibers in terms of nerve impulse conduction?
What is the main difference between myelinated and unmyelinated nerve fibers in terms of nerve impulse conduction?
- Myelinated fibers conduct nerve impulses more energetically than unmyelinated fibers.
- Myelinated fibers conduct nerve impulses faster than unmyelinated fibers. (correct)
- Unmyelinated fibers conduct nerve impulses more efficiently than myelinated fibers.
- Unmyelinated fibers conduct nerve impulses faster than myelinated fibers.
What term is used to describe the conduction of nerve impulses where they jump from one node of Ranvier to another in myelinated nerve fibers?
What term is used to describe the conduction of nerve impulses where they jump from one node of Ranvier to another in myelinated nerve fibers?
- Node-to-node conduction
- Saltatory conduction (correct)
- Jumping conduction
- Sequential conduction
What factor determines the effectiveness of a stimulus on a nerve fiber?
What factor determines the effectiveness of a stimulus on a nerve fiber?
- Sourness of the stimulus
- Intensity of the stimulus (correct)
- Duration of the stimulus
- Color of the stimulus
What is the term used for the minimal intensity of a stimulus that produces a nerve impulse in a nerve fiber?
What is the term used for the minimal intensity of a stimulus that produces a nerve impulse in a nerve fiber?
What law does a single nerve fiber obey in response to stimuli?
What law does a single nerve fiber obey in response to stimuli?
What characterizes the mixed nerve that consists of many nerve fibers?
What characterizes the mixed nerve that consists of many nerve fibers?
Which type of nerve fibers are most susceptible to local anesthetic drugs?
Which type of nerve fibers are most susceptible to local anesthetic drugs?
What type of potential change occurs when using cathodal currents for nerve stimulation?
What type of potential change occurs when using cathodal currents for nerve stimulation?
Which group of nerve fibers is most sensitive to pressure?
Which group of nerve fibers is most sensitive to pressure?
What effect does hyperpolarization have on the excitability of a nerve?
What effect does hyperpolarization have on the excitability of a nerve?
Which type of nerve fibers have the highest speeds of conduction?
Which type of nerve fibers have the highest speeds of conduction?
What leads to an increase in both K+ efflux & Cl- influx in a nerve membrane?
What leads to an increase in both K+ efflux & Cl- influx in a nerve membrane?
What is the mechanism of nerve impulse conduction in unmyelinated nerve fibers?
What is the mechanism of nerve impulse conduction in unmyelinated nerve fibers?
Which type of neuron carries orders from the CNS to organs?
Which type of neuron carries orders from the CNS to organs?
What is the role of myelination in nerve impulse conduction?
What is the role of myelination in nerve impulse conduction?
Which type of neuron is a postganglionic neuron?
Which type of neuron is a postganglionic neuron?
What happens during repolarization in nerve impulse conduction?
What happens during repolarization in nerve impulse conduction?
How does the speed of propagation relate to the diameter of the nerve fiber?
How does the speed of propagation relate to the diameter of the nerve fiber?
