Question
What transfers from CAPILLARIES into TISSUE FLUID? Liquid from the plasma which forms tissue fluid Oxygen from red blood cells [BOTH of these] [NEITHER of these]
Answer
4.2
(282 Votes)
Colin
Master · Tutor for 5 years
Answer
C. [BOTH of these]
Explanation
This question is related to the exchange of substances happening at the capillaries level. Capillaries are small blood vessels where nutrient and gas exchange occur between the blood and surrounding tissues. The options list two main transports: one is plasma leaking out to form tissue fluid or interstitial fluid; the other one is the oxygen carried in red blood cells entering the surrounding tissue. It's known that capillaries let out liquids, plasma components, white cells from the blood forming the liquid part of tissue fluid whereas red blood cells along with some restricted large components often cannot go through capillaries walls. On the other hand, oxygen certainly moves from red blood cells to tissue fluid in order for cells "breathing" to support energy production. Each living cell in a body needs a constant supply of oxygen for cellular respiration. Therefore, this is a trick question, as both events happen at the capillaries.