Exam 9: Nervous Tissue

Which of the following types of ion channels are used to conduct an action potential along a neuronal membrane?

Subthreshold stimulation can cause action potentials.

When nerve fibers are cooled, impulse conduction occurs at higher speeds.

Neurons that conduct nerve impulses from the receptors to the central nervous system are

Which of the following neuroglia forms the myelin sheath around axons in the central nervous system?

Interneurons are usually multipolar neurons.

Compared to unmyelinated axons, myelinated axons

The spread of an impulse along the membrane of a neuron is called

Name the six types of neuroglia and give their general function.

Whether or not an impulse is created in a postsynaptic neuron depends on the ratio of inhibitory versus excitatory neurotransmitters in the synaptic cleft.

The _____ nervous system consists of sensory neurons and motor neurons that stimulate skeletal muscle contractions.

Gray matter of the nervous system

The period of time after creating an action potential during which a neuron cannot generate another action potential is called

The speed of nerve impulse conduction is determined by all of the following EXCEPT

Enteric motor neurons are responsible for stimulating contraction of

During the creation of an action potential, depolarization of a membrane begins with the

The process in which a region of the hypothalamus of the brain receives sensory information from thermoreceptors and decides to stimulate sweating is an example of the _____ function of the nervous system.

Name and describe the function of the two different processes that emerge from the cell bodies of most neurons.

Saltatory conduction refers to the type of impulse conduction used in

Which of the labeled structures in the diagram represents a neurotransmitter receptor?