nervous hw – Flashcards

Motor innervation to the stomach is classified as __________ .

The somatic sensory division of the PNS __________.

The visceral motor division of the PNS __________.

A somatic motor neuron carries

The peripheral nerve fibers that speed up the movement of the digestive tract are classified as

True or False? The somatic motor subdivision of the peripheral nervous system is considered to be an involuntary nervous system.

In which direction does the nerve signal pass at the synapse illustrated here?

What is the function of synaptic vesicles inside axon terminals?

This is the site of communication between neurons.

The ________ of a presynaptic neuron associates with the dendrite of a postsynaptic neuron.

Chemical signals diffuse between neurons at this location.

This region of the neuron contains a single nucleus surrounded by cytoplasm.

This neuronal region transmits electrical impulses away from the cell body.

Which of the following is the correct path an impulse takes across a synapse? A. dendrite of presynaptic neuron, synaptic cleft, axon of postsynaptic neuron B. axon of postsynaptic neuron, dendrite of presynaptic neuron, synaptic cleft C. axon of presynaptic neuron, synaptic cleft, dendrite of postsynaptic neuron D. synaptic cleft, dendrite of postsynaptic neuron, axon of presynaptic neuron

Action potentials travel along the

The chemical substance that is released at axon terminals is called a

Identify the letter that indicates the region of a neuron where neurotransmitters are released. (picture of the neuron)

What is the most likely function of the neuron illustrated here? (B#1)

Motor neurons __________.

Which of the following statements describes interneurons? A. Interneurons are neurons only found in the autonomic nervous system. B. Interneurons are an embryonic cell type that becomes a neuron. C. Interneurons are unipolar neurons whose cell bodies are located in the dorsal root ganglia. D. Interneurons are multipolar neurons that are confined to the CNS and are linked together in chains that form complex neuronal pathways.

The majority of neurons in the body are

Which of the following statements concerning sensory neurons is incorrect? A. They have peripheral and central processes. B. Most are pseudounipolar. C. Most have their cell bodies in ganglia outside the CNS. D. They contain only dendrites.

Interneurons are found

Which relatively rare type of neuron has two processes extending from opposite sides of the cell body?

True or false? Most neurons in the body are multipolar neurons.

True or false? Less than 15% of all neurons are interneurons.

What important function could be diminished if the cilia on ependymal cells were absent?

Which cells provide the myelin sheath for neurons in the CNS?

These glial cells surround the cell bodies of sensory neurons within ganglia of the PNS.

Myelin on axons functions to

Nonmyelinated axons

A nerve cell is the same as a

A node of Ranvier (myelin sheath gap)

The difference between myelinated and unmyelinated axons is that

Ciliated neuroglial cells that form an epithelium and play an active role in forming and moving cerebrospinal fluid are

true or false? Microglia are ciliated to help circulate cerebrospinal fluid (CSF).

Oligodendrocytes and Schwann cells myelinate neurons within the peripheral nervous system.

The entire nerve is surrounded by a tough fibrous sheath called the

The covering of a fascicle within a nerve is the

Which of the following sequences puts the components of a reflex arc in the correct order of their activation?

Which of the following is the correct arrangement of a reflex arc?

An axon collateral from one neuron that circles back and synapses with a previous neuron describes

Which statement below describes the nervous tissue damage associated with multiple sclerosis (MS)?

Identify the letter that indicates the gaps between Schwann cells that are known as myelin sheath gaps (nodes of Ranvier).

Identify the letter that indicates a Schwann cell.

Identify which diagram represents a cell that produces a myelin sheath in the central nervous system.

Identify which letter represents an oligodendrocyte.

Identify which diagram represents cells that produce and circulate cerebrospinal fluid.

True or False A neuron is a collection of nerve fibers in the PNS.

Ganglia represent

Of the following, which is the only structure that is found in the PNS, as opposed to in the CNS?

Which part or parts of the neuron are found in the white matter of the central nervous system?

How are gray matter and white matter arranged in the CNS?

White matter represents

In the region of the spinal cord, the cell bodies of most interneurons lie in

Gray matter in the CNS contains all of the following except

The white matter is the site where neuron cell bodies are clustered.

Which structure is responsible for formation of the regeneration tube following injury to an axon?

In what instance is axonal regeneration possible?

Regeneration of peripheral axons requires

Which statement is true concerning neuronal regeneration?