Which of the following is greater?
(a) The osmotic pressure of the interstitial fluid during inflammation
(b) The osmotic pressure of the interstitial fluid during normal conditions
(c) Neither is greater

Verified step by step guidance

Step 1: Understand what osmotic pressure is — it is the pressure exerted by solutes (like proteins) in a fluid that tends to draw water across a semipermeable membrane.

Step 2: Recall that under normal conditions, the interstitial fluid has a relatively low concentration of proteins, so its osmotic pressure is lower compared to plasma.

Step 3: During inflammation, the permeability of capillaries increases, allowing more proteins to leak into the interstitial fluid, which raises the protein concentration there.

Step 4: Since osmotic pressure depends on solute concentration, the increased protein content in the interstitial fluid during inflammation leads to a higher osmotic pressure compared to normal conditions.

Step 5: Therefore, compare the osmotic pressures by considering the protein concentration changes in the interstitial fluid between normal and inflamed states to determine which is greater.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above.

Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Osmotic Pressure

Osmotic pressure is the pressure exerted by solutes in a fluid that drives water movement across a semipermeable membrane. It depends on the concentration of solutes like proteins and ions, influencing fluid balance between compartments such as blood plasma and interstitial fluid.

Interstitial Fluid Composition

Interstitial fluid surrounds tissue cells and normally has a lower protein concentration than plasma, resulting in lower osmotic pressure. Changes in protein content or solute concentration in this fluid can alter its osmotic pressure and affect fluid exchange.

Inflammation and Vascular Permeability

During inflammation, blood vessel permeability increases, allowing proteins and immune cells to leak into the interstitial space. This raises the protein concentration and osmotic pressure of the interstitial fluid compared to normal conditions, promoting fluid accumulation and swelling.

Recommended video: