VB- Nervous Tissue

Although satellite cells in the peripheral nervous system perform similar functions as astrocytes do in the central nervous system, which of the following distinguishes these types of neuroglia from each other?

Astrocytes establish the blood-brain barrier.

If one of your peers is confused about the function of the central nervous system neuroglia, which of the following would you include in your explanation of the different types and their functions?

Astrocytes surround capillaries in the brain and maintain the blood-brain barrier, which prevents harmful substances from passing from the bloodstream into the brain

Neurotransmitters are chemicals released at synapses that regulate the activity of all of the following EXCEPT a. bones b. other neurons c. muscles d. glands

a. bones

In the neuron, when a depolarizing signal reaches the ____, the change in polarity triggers the release of neurotransmitters from the presynaptic cell.

axon terminal

What is the function of neurons?

conducting electrical signals and passing information rapidly throughout the body

Which of the following describes how signal pass through a typical single neuron?

signals pass from the dendrites through the cell body and down the axon to the axon terminals

All of the following are parts of a neuron EXCEPT a. dendrites b. soma c. axon d. neuroglia

D. neuroglia

If a friend asked you to explain how neuron cell bodies are named in the central nervous system versus the peripheral nervous system, which of the following would you say?

In the central nervous system CNS, a localized collection of neuron cell bodies is referred to as a nucleus; in the peripheral nervous system PNS, a cluster of neuron cell bodies is referred to as a ganglion.

Which of the following statements is true regarding myelin sheaths?

When a myelin sheath surrounds an axon, it provides insulation that increases conduction speed

All of the following are types of neuroglial cells in the central nervous system EXCEPT a. astrocytes b. oligodendrocytes c. satellite cells d. microglia

c. satellite cells

Which part of the neuron receives the messaging signal?

dendrites

Nervous tissue consists of cells called ____, which pass information, and cells that support them, called ____.

neurons, neuroglia

How do Schwann cells differ from oligodendrocytes?

oligodendrocytes have processes that reach out to multiple axon segments, whereas the entire Schwann cell surround just one axon segment

a typical neuron consists of a(n)

soma, MANY dendrites, and one axon

nervous tissue forms the structures of the

spinal cord

Which of the following is a similarity between the central nervous system CNS and peripheral nervous system PNS?

their structures are composed of neurons and neuroglia