Question

Compared to human blood, human urine is

• A. hypotonic
• B. isotonic
• C. hypertonic
• D. All of the above

Answer 1

The correct option is C hypertonic

Human urine is 4 times more concentrated than the human blood. The osmolarity (number of solute particles per litre of solution) of blood is 300 mOsm/L whereas the kidneys can produce urine of osmolarity 1200 mOsm/L.
So, human urine is hypertonic as compared to human blood.
Hypertonic is the solution having higher concentration of solute in the solution than other solution.
Hypotonic is the solution having lower concentration of solute in the solution than other solution. Isotonic is the solution that has the same concentration of solute as another solution.