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chapter 62 - exam 5 Flashcards

(19 cards)

1
Q

energy needs of metabolism

A

glucose + ketone bodies

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2
Q

purpose of oxygen in metabolism

A

used to make ATP for neurons

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3
Q

what happens if the brain does not get oxygen for 5-10 seconds

A

unconsciousness

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4
Q

4 sources of fuel for the brain

A

glucose, glycogen, acetoacetate, beta-hydroxybutyrate

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5
Q

what arteries supply the brain

A

2 vertebral arteries + 2 ICA

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6
Q

plial arteries

A

travel along surface of the brain + branch into penetrating arteries

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7
Q

penetrating arteries

A

head into virchow space of gray matter

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8
Q

virchow robins/perivascular spaces

A

part of subarachnoid space

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9
Q

functions of virchow robins

A

lymphatic system for brain. cleans up debris, WBCs, removes extra protein

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10
Q

microcirculation

A

PUT ON SHEET

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11
Q

autoregulation

A

vasoconstriction of larger arteries to protect smaller vessels

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12
Q

what does autoregulation guard against

A

cerebral stroke

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13
Q

what stimulates vasodilation

A

increased CO2, increased H+ ions, decreased O2

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14
Q

blood brain barrier

A

tight capillary endothelial junctions + foot processes of atsrocytes

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15
Q

what can pass through the blood brain barrier

A

water, CO2, O2, alcohol, lipid soluble solutions

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16
Q

what makes CSF

A

ependymal cells lining ventricles

17
Q

cerebrospinal fluid contents

A

high chloride, low K+, low HCO3-

18
Q

functions of CSF

A

floats, cushions, + protects the brain. controlled environment for neurons

19
Q

hydrocephalus

A

increased intracranial pressure