Phys.: CV physiology Flashcards Preview

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Flashcards in Phys.: CV physiology Deck (41)
1

the SA node is known as the_ of the heart? inn by? prevents?

pacemaker
vagus N.
tetany

2

path of blood flow?

SVC> RA> Tricuspid> RV> pulm. Art> lungs> pulm. vein> LA> mitral> LV> Aorta> body

3

ECG steps?

P- Atrial depol. contract
QRS- Vent depole (contract) & atrial repole (relax)
ST- .04-.06 seconds
T- vent repole (relax)

4

PUMPKIN ???

ATP driven
NA+ out
K+ in
3 NA+ for every 2 K+
Maintains resting state of heart
"PUMP K IN"

5

How BPM for SA node? AV? Bundle of his? Bundle branches? Purkinje fibers?

SA- 60-80 BPM
AV- 40-60
HIS- 20-40
Purkinje- 0-20
Bundle branches- 0

6

what is an ectopic focus?

when the sinus node dies the AV will take over
expect the person to get winded easily, low energy levels

7

Sound 1 is made by?

A-V valves close
(Tricuspid & bicuspid)
LUBB

8

sound 2 is made by?

Semilunar valves closing
Pulmonic & aortic valves
DUBB

9

what are the diastolioc Murmurs?

Aortic
Regurgitation
Mitral
Stenosis
"she DIed in my ARMS & PRTS"

10

what are the systolic murmurs?

Pulmonic
Regurgitation
tricuspid
Stensosis

11

What is hydrostaic pressure?

force exerted by fluid agaisnt a wall

12

what is osmotic pressure?

created by plasma proteins unable to move through the capillary membrane

13

what is the Frank-Starling law?

stroke volume increases in response to increase in volume of blood filling the heart
"just Do It"

14

what is Davis law?

muscle will increase in size when used

15

what is Boyles law?

inversely proportional relationship bwn absolute pressure & volume of a gas.
If temp kept constant w/in a closed system

16

pV=K... what???

p= pressure of sytem
V= denotes volume of gas
k= constant pressure & volume of system

17

an EMG is used for muscle or brain??

Muscle

18

an EEG is used for brain or heart?

Brain

19

EKG & ECG are used for??

Heart

20

which ribs is the heart behind?

2-5th

21

what is the avg BPM? mL of blood per beat?
Normal BP?

75 bpm
70-80 mL
120/80

22

do arteries have valves or muscles? veins?

arteries have muscles
veins have valves

23

what are precursor platlets called?

megakaryotes

24

where are RBC produced?

marrow

25

fxn of RBC?

carry hemoglobin 15g/100 mL

26

aka for RBC?

erythocytes

27

where are RBC produced in embryo? fetus? adult?

E- yolk sac
F- liver, spleen, lymph, bone marrow
A- membranous bone marrow

28

genesis of RBC? how are they formed?

hemocytoblast> normoblast> reticulocyte (1% blood)> erythocyte (99% no nucleus)
"HNRE"

29

where are erythropoietin made? stimulates what?

kidney
RBC production

30

how long does a RBC live?

120 days, recycled in the spleen- heme is saved

31

how is CO2 transported?

plasma bicarbonate

32

how is iron transported?

transferrin (Fe +3)

33

how is iron stored?

(Fe+3) + Apoferritin= ferritin

34

how is iron absorbed?

Fe+2
it requires vit. c to remain in a reduced form

35

WBC aka? different types?

leukocytes
Neutrophils 60%
Lymphocytes 30%
Monocytes 8%
Eosinophils 3%
Basophils 0%
"Never Let My Engine Blow 60-30-8-3-0"

36

which WBC are granulocytes?

Basopphils
Eosinophils
Neutrophils
"BEN"

37

which WBC are Agranulocytes?

Lymphocytes
Monocytes

38

Which WBC are Polymorphonuclear Leukocytes (PMN)?

Neutrophils

39

how does blood clotting occur?

injury> constriction> platelet plug> clot> repair

40

what is the sequence of clotting?

extrinsic (damaged cells) & intrinsic (foreign surface)> prothrombin activator changes prothrombin > thrombin, thrombin is changed into fibrinogen> fibrin> mixes with RBC, platelets & plasma> blood clot

41

what are the different macrophages?

Alveoli- alveolar macrophage
Brain- microglial cells
Liver- Kupffer cells
Tissue- histocyte or fixed macrophages