18 Questions
What type of synapse is described as fast, two-way conductive, and hard to influence impulse transmission?
Electrical synapse
Which neurotransmitter is involved in the removal process from the synaptic cleft through reuptake in the presynaptic terminal?
Norepinephrine
What is the main enzyme responsible for the destruction of acetylcholine in the synaptic cleft?
Acetylcholinesterase
Which of the following is classified as an amino acid derivative neurotransmitter?
Glycine
What is the term for the electrical event that occurs at an excitatory synapse?
EPSP - excitatory postsynaptic potential
Which of the following polypeptides acts as a neurotransmitter according to the text?
VIP - vasoactive intestinal peptide
What is the classification of nerve fibers based on the direction of impulse conduction?
Aferent and eferent
Which type of nerve fibers conduct impulses at a speed of 120 m/s?
Aα
How is impulse conduction primarily carried out in myelinated fibers?
Saltatory conduction
Which factor does NOT determine the velocity of impulse conduction in nerve fibers?
Time constant
Which classification system categorizes nerve fibers based on sensory input sources?
Lloyd-Hunt
What type of nerve fibers are aferent nerve fibers from muscle spindle classified as in the sensory nerve fiber classification?
Ia
Which neurotransmitter is involved in impulse transmission at the nerve-muscle synapse?
Acetylcholine
What receptor type is the target of Acetylcholine at the nerve-muscle synapse?
Nicotinic cholinoreceptor
What enzyme is responsible for destroying neurotransmitter in the synaptic cleft at the nerve-muscle synapse?
Acetylcholinesterase
Which ion diffuses through the postsynaptic membrane into the skeletal muscle fiber during impulse transmission at the nerve-muscle synapse?
Sodium (Na+)
Which enzyme inhibitors are used to enhance N-cholinoreceptor stimulation at the nerve-muscle synapse?
Acetylcholinesterase inhibitors
Which type of myorelaxants block the N-cholinoreceptors at the nerve-muscle synapse?
Competitive myorelaxants
Test your knowledge on impulse transmission in nerve fibers, synapses, parts of the neuron, myelinization, and classification of nerve fibers based on direction of impulse conduction, myelinization, and electrophysiological classification (Erlanger-Gasser).
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