Final Exam Lecture 1 Flashcards
3 Main Functions of Circulatory System
Transport nutrients, waste products, hormones
Vascular Resistance determines?
Blood Flow
If Vascular Resistance in decreased, what happens to blood flow?
Increased blood flow
If Vascular Resistance is Increased, what happens to blood flow?
Blood Flow is decreased
True or False: Vascular resistance is inverse to blood flow
True
If Vascular Conductance is increased, what happens to blood flow?
Easier to drive blood flow
If Vascular Conductance is decreased, what happens to blood flow?
Harder to drive flow
What does the brain use to drive blood flow?
CPP
84% of the blood of the circulatory system is located where?
Venous System
Where is 7% of the CV system blood located?
Heart
Where is 13% of the CV system blood located?
Arteries
Describe System in Parallel, per lecture
Decreased blood flow resistance, as it has more pathways for blood to flow
Describe System in Series, per lecture
*What do you do with the pressures
Increased blood flow resistance, as only 2 blood vessels; you combine the pressures from each tube
What is the Aorta’s Internal Diameter?
*Describe blood flow and velocity
2.5 cm*
Easier blood flow and increased velocity
What are the Small Arteries internal diameter?
20 cm
What are the capillaries internal diameter, all combined?
*Describe blood flow and velocity
2500 cm
*Harder blood flow and decreased velocity
The closer you get to the heart, what happens to the cross-sectional area
Decrease cross-sectional area in cm squared
What is Velocity of Blood flow equal to?
Blood Flow/ Cross Sectional Area
The Further you are from the heart, what happens to pressures?
More decreased pressures
Which has higher pressures: L atria or L ventricle/aorta?
Higher: L Ventricle and Aorta
Which 2 vessels determine blood pressure?
Small arteries and arterioles
What is the pressure in the R atria, per lecture
Around 10 mmHg
Pressure high or low above the chokepoint, between 2 areas?
Higher
Pressure high or low below the chokepoint
Low
Describe Laminar Flow
*Is this desired? Why?
How blood show flow with no turbulent movements
*desired b/c efficient and no problems
In Blood flow, what increases resistance?
Arteriole Walls
Describe Turbulent Flow
*What 2 Things can get stuck
*What can cause Turbulent Flow? Describe the Post-Blood Flow
Disorderly movement when blood is pushed all around the vessel and causes remodeling
*Cholesterol and Ca++ can get stuck
*Clot can cause it and the post blood flow sprays everywhere
What % of Blood Flow does the Kidney Get? L/min?
*Do they need this much bloodflow?
20-22% of blood Flow = 1L/min
*Does not need this much; one of few organs that has more blood flow than actually needs
What is a normal Abdominal Aorta BP, per lecture
100 mmHg
What is a normal renal Vascular Resistance?
0.1 mm/mL/min
Formula for resistence
R = Delta P/F
Increased Resistance = ? conductance
Decreased Conductance
Decreased Resistance = ?Conductance
Increased conductance
Resistance and Conductance are _ proportional to one another?
Inversely
