bio of the brain pt 10/13
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?
