Fichas
BMS10-1022 - Introduction to the CVS and Physics of Blood Flow
Fichas del conjunto (22)
- 1During ventricular systole, which valves are open?Pulmonary and aortic valves
- 2During ventricular diastole, which valves are open?Tricuspid/Mitral
- 3What are the two determinants of Blood Pressure?1. Gravity (higher BP in lower body)
2. Aorta/large arteries (level of vasoconstriction determines TPR) - 4The pulmonary circulation comes from the ... ventricle. It is ...pressure/resistanceRight
Low - 5The systematic circulation comes from the ... ventricle. It is ...pressure/resistanceLeft
High - 6What is the purpose of the portal system?Nutrients are delivered to the liver for detox/processing
- 7What is the difference between laminar and turbulent flow? At what point is it considered turbulent flow?Laminar flow happens with axial streaming and is lower resistance, while turbulent flow is higher resistance and bumpy.
When Reynold's number >4000 - 8What four factors increase resistance/murmurs and cause turbulent flow?1. Increase in diameter without decrease in velocity
2. High velocity
3. Sharp edges
4. Branching - 9How do the flexibility of the tubes help regulate flow?1. Tubes can expand in diameter (dilate) to accommodate flow
2. Myogenic Tone means muscle can constrict to prevent overly-high flow - 10What is flow like in the capillaries?Happens one RBC at a time
- 11Cardiac output is a measure of what? The two equations are...Volume of blood ejected per minute
SV*HR or MAP/TPR - 12What does ejection fraction measure? Ejection fraction is calculated by? What does a ejection fraction of less than 40% indicate?How much of the blood in the left ventricle is pumped out
Stroke Volume/End Diastolic Volume
Heart failure - 13Flow in the heart is measured by .../min and is equal to...Liters/min
Equal to cardiac output - 14What is the difference between stroke volume and cardiac output?Stroke volume is the volume per beat, while cardiac output is the volume per minute
- 15How is flow out of the heart (SV/CO) calculated with end diastolic/end-systolic volume?End diastolic-end systolic volume
- 16What are the two equations for Mean Arterial Pressure?1. Diastolic pressure + ((systolic-diastolic)/3)
2. CO*TPR - 17What is the afterload?The Total Peripheral Resistance as determined by smooth muscle contraction in the artery
- 18According to Darcy's Law, what is the equation for flow?(P1-P2)/Resistance
- 19What is the equation for Resistance (R)R= (8*viscosity*length of tube)/pir^4
=(8VL)/pir^4 - 20How is resistance totalled in blood vessels in series?Rs added together
- 21How is resistance totalled in blood vessels in parallel? (eg. capillaries)1/R1+1/R2....
- 22What is normal CO in a healthy adult?5 L/min
Información
- Descripción
- distinguish between flow and velocity i Define cardiac output, systole/ diastole the value of the normal cardiac output relationship between MAP, COt & peripheral resistance, + why arterioles are main contributors to latter. role and limitations of passive diffusion for substance movement Understand factors influenc flow through tubes, eg. pressure, vessel calibre, resistance to flow and viscosity, and why blood vessels arent rigid laminar/turbulent flow+factors
- Creado por
- Evian Chai
- Visitas
- 41
- Etiquetas
- Valoración