1
Q
What are the functions of the cardiovascular system?
A
Transport materials through the body…
1. From external environment (nutrients, water, and gasses)
2. Materials between cells (hormones, water, and gasses)
3. Wastes eliminated by cells (CO2, heat, and metabolic wastes)
2
Q
What is pressure?
A
Force exerted by fluid on its container
3
Q
What is hydrostatic pressure?
A
force fluid exerts on walls
4
Q
What is a pressure gradient?
A
- Delta P
- The difference in pressure between the 2 regions
- Directly proportional to flow
5
Q
What is flow?
A
the volume of blood that passes a given point in the system per unit of time
- directly proportional to pressure gradient
- inversely proportional to resistance
- depends on pressure gradient, NOT absolute pressure (P)
6
Q
What is the velocity of flow?
A
- the distance a fixed volume of blood travels in a given period of time
- v = Q/A (velocity = flow rate/cross-sectional area of the tube)
7
Q
What is mean arterial pressure (MAP)?
A
- primary driving force for blood flow
- pressure reserved in arteries - blood pressure = pressure gradient
- Proportional to cardiac output * peripheral resistance
- MAP is proportional to CO*PR
8
Q
What is resistance?
A
9
Q
A
BIOL 385
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