Wk 2 BB Flashcards

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1
Q

Most neurons have the following structures:

A

: 1. soma (cell body); 2.
dendrites (branches); 3. axon; 4. terminal buttons (terminals, bouton)

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2
Q

Interneurons

A

lie entirely within the CNS and are involved in cognition
(i.e.,perceiving, learning, remembering and executive functioning such as decision
making).

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3
Q

According to their function neurons can be divided into:

A

Sensory neurons

Motor neurons-

Interneurons

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4
Q

Multipolar neuron –

A

neuron with
one axon and many dendrites
attached to its soma.

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5
Q

Bipolar Neuron –

A

neuron with
one axon and one dendrite
attached it its soma.

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6
Q

Unipolar Neuron

A

neuron with
one axon attached to its soma;
the axon divides, with one
branch receiving sensory
information and the other
sending the information into the
central nervous system.

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7
Q

Astrocytes

A

“star cells”

Provide physical support to neurons

Provide nourishment

when neurones die, they clean uo debris and form scar tissue

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8
Q

Oligodendrocytes

A

produce myelin sheath -

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9
Q

The Blood-Brain Barrier

A

A semipermeable barrier between the CNS and circulatory system,
which helps to regulate the flow of nutrient rich fluid into the brain.

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10
Q

Area Postrema

A

– a region of the medulla where the blood-brain
barrier is weak. This allows toxins in the blood to stimulate this area,
which initiates vomiting – poison expelled from the body

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11
Q

Neuronal integration

A

Process by which inhibitory and excitatory postsynaptic potentials
summate and control the rate of firing of a neuron.

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