Flashcards in Phys.: CV physiology Deck (41)
the SA node is known as the_ of the heart? inn by? prevents?
path of blood flow?
SVC> RA> Tricuspid> RV> pulm. Art> lungs> pulm. vein> LA> mitral> LV> Aorta> body
P- Atrial depol. contract
QRS- Vent depole (contract) & atrial repole (relax)
ST- .04-.06 seconds
T- vent repole (relax)
3 NA+ for every 2 K+
Maintains resting state of heart
"PUMP K IN"
How BPM for SA node? AV? Bundle of his? Bundle branches? Purkinje fibers?
SA- 60-80 BPM
Bundle branches- 0
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
Sound 1 is made by?
A-V valves close
(Tricuspid & bicuspid)
sound 2 is made by?
Semilunar valves closing
Pulmonic & aortic valves
what are the diastolioc Murmurs?
"she DIed in my ARMS & PRTS"
what are the systolic murmurs?
What is hydrostaic pressure?
force exerted by fluid agaisnt a wall
what is osmotic pressure?
created by plasma proteins unable to move through the capillary membrane
what is the Frank-Starling law?
stroke volume increases in response to increase in volume of blood filling the heart
"just Do It"
what is Davis law?
muscle will increase in size when used
what is Boyles law?
inversely proportional relationship bwn absolute pressure & volume of a gas.
If temp kept constant w/in a closed system
p= pressure of sytem
V= denotes volume of gas
k= constant pressure & volume of system
an EMG is used for muscle or brain??
an EEG is used for brain or heart?
EKG & ECG are used for??
which ribs is the heart behind?
what is the avg BPM? mL of blood per beat?
do arteries have valves or muscles? veins?
arteries have muscles
veins have valves
what are precursor platlets called?
where are RBC produced?
fxn of RBC?
carry hemoglobin 15g/100 mL
aka for RBC?
where are RBC produced in embryo? fetus? adult?
E- yolk sac
F- liver, spleen, lymph, bone marrow
A- membranous bone marrow
genesis of RBC? how are they formed?
hemocytoblast> normoblast> reticulocyte (1% blood)> erythocyte (99% no nucleus)
where are erythropoietin made? stimulates what?
how long does a RBC live?
120 days, recycled in the spleen- heme is saved
how is CO2 transported?
how is iron transported?
transferrin (Fe +3)
how is iron stored?
(Fe+3) + Apoferritin= ferritin
how is iron absorbed?
it requires vit. c to remain in a reduced form
WBC aka? different types?
"Never Let My Engine Blow 60-30-8-3-0"
which WBC are granulocytes?
which WBC are Agranulocytes?
Which WBC are Polymorphonuclear Leukocytes (PMN)?
how does blood clotting occur?
injury> constriction> platelet plug> clot> repair
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