Circulatory System 2

Question 1

Net filtration pressure

Answer 1

NFP = filtration pressure - absorption pressure
NFP = (Pcap + Pi(IF)) - (Picap + P(IF))
- Direction of fluid flow across wall of capillary

Question 2

anemia

Answer 2

decrease in oxygen carrying capacity of blood, not alot of RBC’s

Question 3

Blood doping

Answer 3

• want to increase the oxygen carrying capacity of blood

- achieve by 1) high altitude training, 2) reinfusions of packed RBCs and 3) erythropein (EPO)

Question 4

lymphatic system

Answer 4

accessory route by which interstitial fluid can be returned to blood

Question 5

function of lymphatics

Answer 5

1) return of excess filtered fluid
2) defense against disease
3) transport of absorbed fat
4) return of filtered protein

Question 6

Laplace’s law

Answer 6

For a cylindrical vessel, the wall tension is proportional to the internal pressure and the radius.
Tension (T) = pressure (P) * radius of cylinder (R)

Question 7

Poiseuille’s law

Answer 7

A fluid flowing through a vessel encounters resistance, in part due to frictional forces between blood and the vessel wall.

Question 8

Vasoconstriction

Answer 8

Increased contraction of circular smooth muscle in arteriolar wall, which leads to increased resistance and decreased flow through the vessel.

Question 9

Vasodilation

Answer 9

Decreased contraction of circular smooth muscle in the arteriolar wall, which leads to decreased resistance and increased flow through the vessel.

Question 10

Lymph flow accomplished by

Answer 10

• Lymph vessels are surrounded by smooth muscle cells

- Lymph vessels lie between skeletal muscles