week 6

Question 1

what occurs at capillaries

Answer 1

fluid exchange

Question 2

what helps blood distribution

Answer 2

vascular shunt

Question 3

why is capillaries good for exchange

Answer 3

thin

Question 4

what is the resistance for arteries

Answer 4

150-300um

Question 5

what has the least resistance

Answer 5

capillaries

Question 6

what is the resistance for arterioles

Answer 6

30-150um

Question 7

terminal arterioles resistance is

Answer 7

10-30um

Question 8

what is hyperemia

Answer 8

blood flow increases in relation to metabolic activity of a tissue / organ

Question 9

ph decreases due to what

Answer 9

lactate production during exercise and dilation of blood vessels

Question 10

what allows dialtion

Answer 10

nitrous oxide from synthase

Question 11

blood flow what to skeletal muscle during exercise

Answer 11

increases

Question 12

what percent of blood during maximal exercise to skeletal muscle

Answer 12

80-85%

Question 13

what does the heptatic artery do

Answer 13

filter bad nutrients compared to the blood going to the portal vein

Question 14

what is the splanic circulation

Answer 14

liver , gi tract, pancreas and spleen

Question 15

what is the total blood volume in the splanchnic reigon

Answer 15

20-25%

Question 16

constriction in splanich circulation can add blood volume into the circulation - increasing what

Answer 16

venous return

Question 17

what ml in skin during rest

Answer 17

100-300

Question 18

what is maxmial volume of blood in skin

Answer 18

7-8L

Question 19

skin is a part of what circulation

Answer 19

cutaneous neural control

Question 20

what controls skin vasoconstrictor

Answer 20

adrenergic - non hairy skin

Question 21

what is a dilator within the skin

Answer 21

hairy skin

Question 22

noepe is a NT for what

Answer 22

adrenergic

Question 23

acetyle coa is a NT for what

Answer 23

cholinergic

Question 24

cold leads to

Answer 24

vasoconstriction

Question 25

what activity is linked to cold stress

Answer 25

sympathetic constrictor activity

Question 26

what is linked to sympathetic constrictor activity

Answer 26

adrenergic

Question 27

what is linked to sympathetic dilator activity

Answer 27

cholinergic

Question 28

skin circulation can determine what

Answer 28

the performance of the heart

Question 29

heat impacts blood flow causing what

Answer 29

filling of heart is reduced due to less blood in the core

Question 30

after exercise there is an increase in what

Answer 30

waste in urine and blood due to reduced blood flow in kidneys due to exercise

Question 31

fick equation shows what

Answer 31

o2 delivery to muscles increases with exercise intensity due to rising Q and arteriovenous return

Question 32

20-25 % of blood flow is always where

Answer 32

brain

Question 33

aerobic fitness and brain blood flow are

Answer 33

linked

Question 34

what is a doppler

Answer 34

measures blood velocity as an index flow

Question 36

what is NIRS

Answer 36

near-infrared spectroscopy - measures balance of o2 supply at capillary level in cerebral cortical tissue

Question 37

what can occur with acute CBF regulation

Answer 37

stroke or faint

Question 38

what can occur with chronic CBF regulation

Answer 38

hypertension, dementia and concussion / tbi

Question 39

changes in bp post exercise is normal t or f

Answer 39

true

Question 40

cbf is

Answer 40

cerebral blood flow ( regulation)

Question 41

what factors does exercise effect

Answer 41

broreflex, Arterial BP, symp + para NS, cardiac output, metabolism

Question 42

brain blood flow is sensitive to changes in arterial pressure of co2 (PACO2)

Answer 42

true

Question 43

BBF increases as what increases

Answer 43

exercise intensity