biol 320 lab 1 quizlet
Why is myelin important?
-It speeds up signal conduction in the nerve fiber. -It is formed to assist in the regeneration of damaged fibers. -It insulates the nerve fiber.
The Schwann cell's plasma membrane spirals repeatedly around the unmyelinated fiber as it does in a myelin sheath.
The Schwann cell's plasma membrane does not spiral repeatedly around the fiber as it does in a myelin sheath, but folds once around each fiber and somewhat overlaps itself along the edges
axon hillock
What is the highlighted structure?
multipolar neuron
What is the structure highlighted?
Nissl bodies
What structure is highlighted?
myelin sheath
What structure is highlighted?
nucleolus of neuron
Which structure is highlighted?
soma of neuron
Which structure is highlighted?
synaptic cleft
Which structure is highlighted?
what is the most abundant cell in the CNS?
astrocytes
what is the least common leukocyte
basophil
what quality belongs to both oligodendrocytes and schwann cells?
both provide myelination
what two things does an astrocyte connect?
capillary and neuron
which of the following parts of a neuron receives and processes information?
cell body
What is the order that an electrical impulse would travel beginning with the postsynaptic membrane?
dendrites, soma, axon hillock, axon, presynaptic terminal
oligodendrocytes
form myelin sheaths in the CNS
schwann cells
form myelin sheaths in the PNS
the central sulcus separates
frontal and parietal lobes
ependymal cells
function in the production and circulation of CSF
Choose the correct statement about myelin
it is best not to give children under 2 a low fat diet because myelin formation requires lipids
microalgia
macrophages of the CNS
astrocytes
multifunctioning cells involved with neurogenesis, scar formation, BBB maintenance, etc
what is the most common leukocyte
neutrophils
are schwan cells glial of the central nervous system?
no, they belong to the peripheral nervous system
Pineal body: melatonin
structure and corresponding secretion
central sulcus
structure?
corpus collosum
structure?
myelinated axon
structure?
node of ranvier
structure?
nucleus of schwann cell
structure?
synaptic vesicles in a presynaptic terminal
structure?
satellite cells
support cells in the PNS that surround neuronal cell bodies
what surrounds the nucleus of the schwann cell?
the neurilemma
In the PNS, unmyelinated fibers are enveloped in Schwann cells.
true
parietal lobe
what lobe?
Sulcus
what structure
Thalamus
what structure
unmyelinated axons
what structure is highlighted?
Cytoplasm of Schwann cell
what structure?
dendrites
what structure?
occipital sinus
which sinus
