Exam 11: Fundamentals of the Nervous System and Nervous Tissue

What is the role of microglial cells and why are they so important in the CNS?

Why does a hyperpolarization phase generally follow a repolarization phase in an action potential?

The synapse more common in embryonic nervous tissue than in adults is the .

The substance released at axon terminals to propagate a nervous impulse is called an)_ .

What function is served by the increased axon diameter at the nodes of Ranvier?

A neuron that has as its primary function the job of connecting other neurons is called an) .

Which of the following is an excitatory neurotransmitter secreted by motor neurons innervating skeletal muscle?

When one or more presynaptic neurons fire in rapid order it produces a much greater depolarization of the postsynaptic membrane than would result from a single EPSP; this event is called summation.

Which pattern of neural processing is important for higher level mental processing such as problem solving?

A gap between Schwann cells in the peripheral system is called an).

Ependymal cells .

A second nerve impulse cannot be generated until .

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