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Flashcards in Cardiovascular System Deck (51):
1

What is Heart rate for an untrained athlete at rest

70-72

2

What is heart rate for an untrained athlete at maximal intensity

220-age

3

What is stroke volume for an untrained athlete at rest

70 ml

4

what is stroke volume for an untrained athlete at maximal intensity

100-120 ml

5

what is cardiac output for an untrained athlete at rest

5 l/min

6

what is cardiac output for an untrained athlete at maximal intensity

20-30 l/min

7

what is heart rate for a trained athlete at rest

50 bpm

8

what is heart rate for a trained athlete at maximal exercise

220-age

9

what is stroke volume for a trained athlete at rest

100ml

10

what is stroke volume for a trained athlete at maximal exercise

160-200 ml

11

what is cardiac output for a trained athlete at rest

5 l/min

12

what is cardiac output for a trained athlete at maximal exercise

30-40 l/min

13

What is the main control point for your heart rate

Cardiac Control Centre (ccc)

14

Where is the CCC found

medulla oblongata

15

what does the sympathetic nervous system do?

increase heart rate

16

What does the parasympathetic nervous system do?

slows heart rate

17

What does Chemoreceptors detect?

change in CO2 and lactic acid (ph levels)

18

What does proprioceptors detect?

movement

19

what does baroreceptors detect?

change in blood pressure

20

what is in the neural control

chemoreceptors, proprioceptors and baroreceptors

21

whats in the hormone control

adrenalin and noradrenalin

22

what does an increase in adrenalin cause

speeds up heart rate

23

what does vascular mean?

blood vessels

24

what are the three main blood vessels

Artery's, Capillaries, veins

25

what are smaller artery's called

arterioles

26

what are smaller veins called

venules

27

why do veins contain valves

to prevent back flow of blood

28

Pulmonary artery only deal with oxygenated or deoxygenated blood?

Deoxygenated

29

what is Venus return

blood returning to the heart c

30

what aids venus return

pocket valves, smooth muscle

31

what does vasoconstriction means

blood vessels getting smaller

32

how does gravity aid Venus return

it helps pull blood down from veins above the heart

33

what mechanism does the ccc control

vascular shunt mechanism

34

what does the ccc control

blood pressure

35

where is blood flow redistributed

CCC

36

what nerves are linked to the pcs or muscular layer of arteriole walls?

vasomotor centre

37

what causes veins to contract

the smooth muscles around them

38

what pump help squeeze blood back to the heart?

skeletal muscular pump

39

what type of contraction takes place when the skeletal muscular pump squeezes

concentric contraction

40

what pump helps to pull blood back up to the heart during inspiration

respiratory pump

41

while blood is being pulled back to the heart by the respiratory pump is the pressure high or low in the abdomen and thoracic cavity?

low pressure in abdomen and
high in thoracic cavity

42

what is Sterling's law

stroke volume is dependant on venous return

43

What does more blood in the atrium cause?

a stretch in the atrium walls

44

what does the stretch in the atrium wall cause?

SA node?

45

what does the increased firing rate of the SA node cause?

an increase in heart rate

46

what does a increase in heart rate cause for he ventricles?

more blood enters the ventricles

47

what happens when more blood enters the ventricle

it causes a stretch in the ventricle walls

48

what does a stretch in the ventricle walls cause?

an increase in EDV

49

What does an increase in EDV cause

a more forceful contraction of the ventricles

50

what happens to the esv when the edv increases and a more forceful contraction of the ventricles takes place?

the ESV decreases

51

what does a decrease in ESV cause?

an increase in stroke volume