Exam 11: Fundamentals of the Nervous System and Nervous Tissue

If a motor neuron in the body were stimulated by an electrode placed about midpoint along the length of the axon ________.

Which of the following describes the excitatory postsynaptic potential?

Figure 11.2 Using Figure 11.2, match the following: -Synaptic cleft.

Match the following: A) Spatial summation B) Threshold stimulus C) Subthreshold stimulus D) Temporal summation -An insufficient stimulus.

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

Match the following: A) Absolute refractory period B) Repolarization C) Action potential D) Depolarization E) Relative refractory period -The neuron cannot respond to a second stimulus, no matter how strong.

Collections of nerve cell bodies outside the central nervous system are called ________.

What is the difference between a direct acting neurotransmitter and an indirect acting neurotransmitter?

How can a single axon respond to several different kinds of events?

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

Figure 11.1 Using Figure 11.1, match the following: -Which neuron is never myelinated?

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

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

Which of the following will occur when an excitatory postsynaptic potential (EPSP) is being generated on the dendritic membrane?

Which of the following neurotransmitters inhibits pain and is mimicked by morphine, heroin, and methadone?

Schwann cells are functionally similar to ________.

The overlapping functions of the nervous system are sensory input, integration, and motor output.

Immediately after an action potential has peaked, which cellular gates open?

Match the following: A) Spatial summation B) Threshold stimulus C) Subthreshold stimulus D) Temporal summation -Numerous nerve impulses arriving at a synapse at closely timed intervals exert a cumulative effect.

Neuroglia that control the chemical environment around neurons by buffering potassium and recapturing neurotransmitters are ________.