Question

lo 2.2. what is the rh factor? a hormone produced by the adrenal gland a protein found in hair and nails a type of white blood cell responsible for fighting infections protein on the surface of red blood cells that can be either present or absent a chemical messenger that regulates mood and emotion

Explanation:

The Rh factor is a protein (antigen) found on the surface of red blood cells. If the Rh factor is present, a person is Rh-positive; if absent, Rh-negative.

• A hormone produced by the adrenal gland is incorrect as the Rh factor is not a hormone.
• A protein found in hair and nails (keratin) is a different protein.
• A type of white blood cell is wrong; the Rh factor is on red blood cells.
• A chemical messenger (neurotransmitter or hormone) regulating mood/emotion is not the Rh factor.

Answer:

Protein on the surface of red blood cells that can be either present or absent