Exam 11: Fundamentals of the Nervous System and Nervous Tissue

A postsynaptic potential is a graded potential that is the result of a neurotransmitter released into the synapse between two neurons.

What does the central nervous system use to determine the strength of a stimulus?

What mechanism is responsible for axonal transport?

Nerve impulses are sent to slow the heart's rate of contraction. The nerve fibers sending these signals will most likely belong to which division of the nervous system?

Which of the choices below describes the ANS?

A stimulus traveling toward a synapse appears to open calcium ion channels at the presynaptic end, which in turn promotes fusion of synaptic vesicles to the axonal membrane.

Which of the following is NOT a chemical class of neurotransmitters?

During the relative refractory period of an action potential, a larger than normal stimulus is needed to cause another action potential. This is due to the fact that ___________.

Sally, a 5-year-old child, was bitten on the hand by a bat that was later diagnosed with rabies. She was immediately treated after the bite but had to go through a series of more involved treatments after the rabies diagnosis in the bat that bit her. How does the rabies virus get to the brain from a simple hand wound?

When a sensory neuron is excited by some form of energy, the resulting graded potential is called a(n) __________ .

Strong stimuli cause the amplitude of action potentials generated to increase.

It is important for newly developed neurons to form synapses with other neurons. Which cells are most responsible for guiding the formation of these particular junctions?

Unipolar neurons have axons structurally divided into peripheral and central processes.

What are the basic divisions of the peripheral nervous system?

Define synaptic delay.

In myelinated axons the voltage-regulated sodium channels are concentrated at the nodes of Ranvier.

Immediately after an action potential has peaked, which of the following channels will open?

The peripheral nervous system is divided into afferent and efferent divisions.

The term central nervous system refers to the _________.

The concentration of ions in the chemical environment surrounding the neurons must be tightly regulated for neurons to function properly. Which of the following cells is most responsible for this?