Answer:
The net direction of fluid movement will be into the capillary on the venous end, as the NFP is negative, indicating a net reabsorption of fluid into the capillary.
Explanation:
To determine the net direction of fluid movement in the capillary, we can use the Starling forces equation, which takes into account the balance between hydrostatic pressure and oncotic pressure.
The net direction of fluid movement is determined by comparing the forces driving fluid out of the capillary (capillary hydrostatic pressure and interstitial oncotic pressure) with the forces drawing fluid into the capillary (capillary oncotic pressure and interstitial hydrostatic pressure).
The Starling forces equation is given by:
Net filtration pressure (NFP) = (Pc - Pi) - (πc - πi)
Where:
Pc = capillary hydrostatic pressure
Pi = interstitial hydrostatic pressure
πc = capillary oncotic pressure
πi = interstitial oncotic pressure
Given:
Pc = 35
pc = 14
πi = 3
πi = 0
On the arterial end of the capillary:
NFP (arterial) = (Pc - Pi) - (πc - πi)
NFP (arterial) = (35 - 14) - (3 - 0)
NFP (arterial) = 21 - 3
NFP (arterial) = 18
On the venous end with a decrease in capillary hydrostatic pressure to 15:
NFP (venous) = (Pc - Pi) - (πc - πi)
NFP (venous) = (15 - 14) - (3 - 0)
NFP (venous) = 1 - 3
NFP (venous) = -2
Thus, the net direction of fluid movement will be into the capillary on the venous end, as the NFP is negative, indicating a net reabsorption of fluid into the capillary.
Question:
If Pc=35, pc = 14, pi = 3, and Pi = 0
If the NDP above is on the arterial end of the capillary, and the only change in Starling forces on the venous end are a decrease in capillary hydrostatic pressure to 15, What will be the net direction of fluid movement?