In the Dehydrated State

Question

In the dehydrated state,
A) capillary oncotic pressure decreases; fluid accumulates in the tissue spaces.
B) capillary filtration pressure decreases; tissue fluid is absorbed.
C) capillary filtration rate increases, thereby increasing lymph formation.
D) plasma protein is filtered into the tissue spaces, causing edema.

Accepted Answer

In the dehydrated state, the body undergoes a fluid shift in which there is a decrease in extracellular fluid volume. This leads to a decrease in capillary filtration pressure, which causes tissue fluid to be absorbed back into the capillaries. This helps to restore the fluid balance of the body.

Answer: A 
 If there is a decrease in extracellular fluid volume, there is also a decrease in capillary oncotic pressure (which is due to the decreased concentration of plasma proteins). This can cause fluid to accumulate in the tissue spaces, leading to edema.

Answer: C and D are incorrect options. An increase in capillary filtration rate would lead to increased fluid movement out of the capillaries and into the tissue spaces, exacerbating dehydration. Plasma protein is not filtered into the tissue spaces in the dehydrated state.