Question

Which of the following is found in plasma but not usually in the tubular fluid?

o nitrogenous wastes
o large protein
o vitamin
o water
o amino acids

Answer 1

Large proteins are present in plasma but not typically found in tubular fluid due to their size, as they are retained in the bloodstream by the kidneys and contribute to osmotic pressure.

Step-by-step explanation:

The substance found in plasma but not usually in the tubular fluid is large proteins. Plasma, which is the liquid component of blood, is made up of approximately 90% water and contains a variety of substances including electrolytes, dissolved gases, organic nutrients, and metabolic wastes. However, due to their size, large proteins such as albumin and globulins do not typically pass through the capillary walls into the tubular fluid. The kidneys filter blood plasma through the glomerulus but retain these proteins within the bloodstream, contributing to the osmotic pressure and maintaining the fluid balance in the body.