biol 320 lab 1 quizlet

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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


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