bio of the brain pt 10/13

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microglia

glial cells whos function most closely resembles that of the immune system are called?

occupy about the same total space as do neurons

glial cells:

radial glia:

guide the migration of neurons doing embryonic development

astrocytes

one type of glial that helps synchronize the activity of axons. they are called?

true

t or f? Schwann cells build the myelin sheaths in the periphery of the body

true

t or f? at rest, the inside of a neuron's membrane is more negative than on the outside

false

t or f? glial cells transmit information across long distances

false

t or f? the sodium- potassium pump is what normally brings the membrane back to its original state of polarization after the peak of the action potential

true

t or f? there are more glial cells than neurons in the human brain

sodium ions entering the cell

the action potential of a neuron depends mostly on what movement of ions?

the negative charge on the inside of the neuron

the resting potential of a neuron refers to:

into the cell; out of the cell

the sodium- potassium pump pumps sodium ions_______ and potassium ions______

they are typically found wrapped around presynaptic endings at the axon branches

what are astrocytes?

they act like an immune system, and remove waste as well as viruses, and other microorganism

what are microglia

they are for myelin sheath around neurons in the peripheral nervous system

what are schwann cells?

a type of astrocyte that moves neurons into position during embryonic development

what are the radial galia?

it is +20 on the inside of the axon

what is action potential?

it is -70 mv inside the axons

what is resting potential?

glucose

what is the main source of nutrition for vertebrate neurons?

form myelin sheath around neurons in the central nervous system

what is the oligodendrocytes?

the sodium potassium pump, that uses energy from atp.

what is used in the process of going back to resting potential after action potential occurs?

olgodendrocytes

what type of glial cells myelinate axons in the brain and spinal cord?

at the axon hillock

where do most action potentials begin?

transmitting information

which function is not proformed by glial?

the cell is prepaired to respond quickly to a stimulus

which of the following is an advantage of having resting potential?

schwann cells

which type of glia builds myelin sheaths around axons in the periphery of the body?

astrocytes

which type of glia remove waste material in the nervous system?


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