Which of the following substances represents an abnormal finding in urine sample?

A. Child contracting chickenpox in daycare: Represents naturally acquired active immunity, because the child’s immune system responds to the infection and produces its own antibodies.
B. Antiserum injected after snake bite: Represents artificially acquired passive immunity, since ready-made antibodies are given.
C. Flu vaccine administered at clinic: Represents artificially acquired active immunity, since antigens stimulate the body’s immune response.
D. Antibodies transferred to an infant during breastfeeding or pregnancy: Represents naturally acquired passive immunity, as antibodies from the mother provide temporary protection to the infant.

A. An isotonic solution: Has the same solute concentration as the cell interior, so water movement is balanced and the cell size remains unchanged.
B. Hypotonic solution: Has lower solute concentration outside the cell, so water enters the cell, causing swelling or lysis.
C. Hydrostatic solution: Refers to fluid pressure exerted by a liquid, not osmotic balance related to cell size.
D. Hypertonic solution: Has higher solute concentration outside the cell, so water leaves the cell, causing shrinkage (crenation).