Quizzes - BrainMass

1

What are two types of cells in the nervous system that primarily encode, process, and store information?

axons and dendrites

neurons and glia

sensory neurons and motor neurons

nerve cells and muscle cells

2

Which of these represents the correct order by which a nervous signal is passed across a neuron?

dendrites, cell body, axon hillock, axon, axon terminals

cell body, axon terminals, dendrites, axon hillock, axon

axon, axon hillock, cell body, dendrites

axon hillock, axon, dendrites, cell body

3

Which of these are NOT considered glial cells?

bipolar cells

Schwann cells

microglia

astrocytes

4

What is the area called where a neuron comes extremely close to a target cell and transmits information to it?

the ganglion

the synapse

the nodes of Ranvier

the axon hillock

5

What is the chemical called that are released b the axon terminals to continue the propagation of the nervous signal?

glucose

myelin

ATP synthase

acetylcholine

6

How do astrocytes influence the connectivity between a pre- and postsynaptic neuron?

They cause additional storage of glycogen within the neuron, thereby increasing its metabolism.

The increase myelination of neurons, which results in faster action potentials.

They take up and release neurotransmitters and alter the activity of the neurons.

They conduct the action potential, which increases the flow of information.

7

Which of these statements about microglia is TRUE?

They supply neurons of the brain and spinal cord with nutrients.

They mediate inflammatory responses in the brain and spinal cord.

They form synapses with the brain and spinal cord neurons.

They form myelin sheaths around the neurons of the brain and spinal cord.

8

Which of these describes the resting potential of a neuron?

The outside is about 60 millivolts more positive than the inside.

The inside is about 60 millivolts more positive than the outside.

The inside is about 30 millivolts more positive than the outside.

The outside is about 30 millivolts more positive than the inside.

9

Which of these statements about the nodes of Ranvier is TRUE?

The myelinated membrane next to the nodes allows for the firing of action potentials.

The nodes are regions where the nerve axon is myelinated.

The regions between the nodes contains voltage--gaited ion channels.

The nodes allow for the jumping of action potentials between them.

10

Which of these is the result of the binding of acetylcholine on the motor end plate?

A graded potential forms.

The cell is hyperpolarized.

An action potential ensues.

An equilibrium potential for K ions occurs.

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Nerves and the Nervous System