18.5 Capillary Pressures and Water Movement Flashcards
Water crosses a capillary by _______, or the movement of a fluid by ________ such as _____
Water crosses a capillary by filtration, or the movement of a fluid by a force such as pressure or gravity.
Hydrostatic pressure is the force that the ________ exerts on ________. The hydrostatic pressure gradient forces ______to ________the capillary and _______the _________ fluid.
Hydrostatic pressure is the force that the blood exerts on the wall of the vessel. The hydrostatic pressure gradient forces water to leave the capillary and enter the interstitial fluid.
Osmotic pressure is the force that must be applied to a solution in order to prevent osmosis—it is higher in solutions with higher osmolarity.
Osmotic pressure is higher in blood than in interstitial fluid, which creates an osmotic pressure gradient—the colloid osmotic pressure—that draws water into the capillary.
Osmotic pressure is the force that must be applied to a solution in order to prevent osmosis—it is higher in solutions with higher osmolarity.
Osmotic pressure is higher in blood than in interstitial fluid, which creates an osmotic pressure gradient—the colloid osmotic pressure—that draws water into the capillary.
The net filtration pressure in a capillary is the difference between the hydrostatic pressure gradient and colloid osmotic pressure. The overall net filtration pressure in a capillary bed is about 6 mm Hg in favor of filtration.
What is Edema?
Edema is an excessive amount of water in the interstitial fluid.
Blood pressure is equivalent to:
hydrostatic pressure.
colloid osmotic pressure.
oncotic pressure
net filtration pressure
Blood pressure is equivalent to:
hydrostatic pressure.
colloid osmotic pressure.
oncotic pressure
net filtration pressure
Answer: A
Which pressure remains the same along the length of the capillary?
interstitial fluid osmotic pressure
colloid osmotic pressure
interstitial fluid hydrostatic pressure
capillary hydrostatic pressure
Which pressure remains the same along the length of the capillary?
interstitial fluid osmotic pressure
colloid osmotic pressure
interstitial fluid hydrostatic pressure
capillary hydrostatic pressure
What is edema?
Multiple choice:
- absorption
- net filtration pressure
- dehydration
- swelling
What is edema?
absorption
net filtration pressure
dehydration
swelling
Determine fluid movement when hydrostatic pressure exceeds coloid osmotic pressure at the arteriolar end of the capillary
water is pushed off the capillary by filtration
