chapter 62 - exam 5

Question 1

energy needs of metabolism

Answer 1

glucose + ketone bodies

Question 2

purpose of oxygen in metabolism

Answer 2

used to make ATP for neurons

Question 3

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

Answer 3

unconsciousness

Question 4

4 sources of fuel for the brain

Answer 4

glucose, glycogen, acetoacetate, beta-hydroxybutyrate

Question 5

what arteries supply the brain

Answer 5

2 vertebral arteries + 2 ICA

Question 6

plial arteries

Answer 6

travel along surface of the brain + branch into penetrating arteries

Question 7

penetrating arteries

Answer 7

head into virchow space of gray matter

Question 8

virchow robins/perivascular spaces

Answer 8

part of subarachnoid space

Question 9

functions of virchow robins

Answer 9

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

Question 10

microcirculation

Question 11

autoregulation

Answer 11

vasoconstriction of larger arteries to protect smaller vessels

Question 12

what does autoregulation guard against

Answer 12

cerebral stroke

Question 13

what stimulates vasodilation

Answer 13

increased CO2, increased H+ ions, decreased O2

Question 14

blood brain barrier

Answer 14

tight capillary endothelial junctions + foot processes of atsrocytes

Question 15

what can pass through the blood brain barrier

Answer 15

water, CO2, O2, alcohol, lipid soluble solutions

Question 16

what makes CSF

Answer 16

ependymal cells lining ventricles

Question 17

cerebrospinal fluid contents

Answer 17

high chloride, low K+, low HCO3-

Question 18

functions of CSF

Answer 18

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

Question 19

hydrocephalus

Answer 19

increased intracranial pressure