Neuron Physiology Quiz

What is the term used to describe the state of a neuron when it is not sending a signal?

• Action potential

• Depolarization

• Resting potential

• Hyperpolarization

Which potential is known as a brief reversal of the resting potential due to the influx of sodium ions?

• Graded potential

• Resting potential

• Action potential

• Hyperpolarization

What is the function of the Na+/K+ pump in neuron physiology?

• To generate action potentials

• To maintain the resting potential

• To depolarize the neuron

• To hyperpolarize the neuron

What is the difference between an IPSP and an EPSP?

• IPSP is a depolarization, while EPSP is a hyperpolarization

• IPSP is a hyperpolarization, while EPSP is a depolarization

• IPSP increases the likelihood of an action potential, while EPSP decreases it

• IPSP and EPSP are both forms of action potentials

Which channels are responsible for the initiation of an action potential?

• Ligand-gated channels

• Voltage-gated channels

• Metabotropic receptors

• Na+/K+ pump

What is the refractory period in neuron physiology?

• The time during which a neuron can generate another action potential

• The time during which a neuron cannot generate another action potential

• The time it takes for the Na+/K+ pump to restore the resting potential

• The time it takes for an action potential to travel down the axon

What aspect of neuron anatomy can enhance the faster conduction of action potentials?

• The presence of dendrites

• The presence of cell bodies

• The presence of myelin on axons

• The absence of myelin on axons

Which of the following is a characteristic of the autonomic nervous system?

• It includes the CNS and PNS

• It is only sympathetic

• It has agonists and antagonists

• It is not involved in the regulation of the blood brain barrier

What is the primary neurotransmitter of the sympathetic nervous system?

• Acetylcholine (ACh)

• Dopamine

• Serotonin

• Catecholamines (Epinephrine, Norepinephrine)

What is the difference between pre-ganglionic and post-ganglionic neurons in the autonomic nervous system?

• Pre-ganglionic neurons are in the CNS, post-ganglionic are in the PNS

• Pre-ganglionic neurons are in the PNS, post-ganglionic are in the CNS

• Pre-ganglionic neurons are modified adrenal medulla, post-ganglionic are target tissues

• Pre-ganglionic neurons are post-synaptic, post-ganglionic are pre-synaptic