Exam 19: Nerve Signaling

Chemical synapses involve neurotransmitters.

The fastest nerve fibers in the body can conduct an impulse that is how much faster than the slowest fibers in the body?

Dopamine, epinephrine, and norepinephrine are classified as:

During a relative refractory period:

Which of the following antidepressants acts by blocking the action of monoamine oxidase (MAO)?

Excitatory neurotransmitters are most likely to initiate an action potential.

The receptors embedded in the plasma membrane of a postsynaptic neuron are protein molecules.

Synapses between axons are the most common synapses in the nervous system.

Explain what characteristics of the neuron affect the speed at which action potentials are conducted. What is the range of speed at which an impulse can be conducted?

A membrane that exhibits a membrane potential is said to be depolarized.

The fastest nerve fibers in the body can conduct impulses up to approximately _____ meters per second.

Electrical synapses can be found in muscle tissue.

Which of the following statements about amino acid neurotransmitters is incorrect?

When a neuron is resting, the inner surface of its plasma membrane is slightly positive compared with its outer surface.

Which neuron could transmit a nerve impulse the fastest?

Describe the process of impulse conduction across a synapse.

A synapse can occur only between an axon and:

When a neuropeptide is secreted with one or two other neurotransmitters, it is thought to serve as a neuromodulator, regulating the effects of the other neurotransmitters.

The sensory fibers from the skin generally conduct impulses up to about 130 meters per second.

An electrical synapse occurs when a strong action potential is able to arc across a small synaptic cleft.