week 5

Question 1

the circulatory system is what 2 systems

Answer 1

cv and resp

Question 2

what does cardresp system do

Answer 2

move o2 and nutrients and reg body temp

Question 3

what are the 2 adjustments of blood flow during exercise

Answer 3

increase cardiac output
redistribution of blood to muscles

Question 4

the 4 parts of CVresp system

Answer 4

heart, arteries, arterioles, veins, venules and capillaries

Question 5

what is the pulmonary circuit

Answer 5

right side of heart, oxygenates blood and returns it to the left side of heart

Question 6

what is the systematic circuit

Answer 6

pumps oxygenated blood to rest of the body using arteries

Question 7

wall components are made of smooth tissue - 4 examples

Answer 7

collagen, smooth muscle, elastin and endothelium

Question 8

what 3 things does blood hold

Answer 8

ions, hormones and proteins

Question 9

what cells carry hemoglobin

Answer 9

erythrocytes

Question 10

what cells prevent clotting

Answer 10

platelets

Question 11

what is a hematocrit

Answer 11

percentage of blood composed of erythrocytes

Question 11

what makes up blood

Answer 11

plasma and hematocrit (42%)

Question 11

how do you calculate plasma volume

Answer 11

hematocrit percentage x blood volume = x L
PLASMA = 5.5L - 2.3L = 3.2L

Question 12

what is resistance

Answer 12

measure of hinderance to blood flow through a vessel

Question 13

blood flow = change in pressure / resistance
links to whos law

Answer 13

darcys law

Question 14

what is the change in pressure for darcys law

Answer 14

p1 - p2

Question 15

resistance depends on what 3 things

Answer 15

length, viscosity and radius

Question 16

how do you work out resistance

Answer 16

length x viscosity / radius ^4

Question 17

what is the greatest influence on resistance

Answer 17

radius of vessel

Question 18

how is total peripheral resistance calculated

Answer 18

MAP and CO
TPR X CO = MAP

Question 19

what is local vascular resistance

Answer 19

R to blood flow in an organ or tissue calculated from pressure and organ/tissue flow

Question 20

for a single vessel - turn ^4 into -4 - whos law

Answer 20

Poiseuille’s law

Question 21

baroreceptors detect what

Answer 21

changes in arterial bp

Question 22

muscle mechanoreceptors examples

Answer 22

muscle spindles, golgi tendon organs

Question 23

muscle chemoreceptors

Answer 23

changes in chemical - h+ and CO2 and ph

Question 24

central command theory states what

Answer 24

cv system drives come from a higher brain

Question 25

fine tuned afferent feedback comes from where

Answer 25

heart and muscle mechanoreceptors and pressure sensitive receptors - baro

Question 26

what is exercise pressor reflex

Answer 26

peripheral feedback to the medulla oblongata to amend the CV response to exercise

Question 27

what is AV difference

Answer 27

amount of o2 in 100ml of blood

Question 28

does av increase or decrease during exercise

Answer 28

increase