Question

practice ii
lo 6.1. what are nephrons?
millions of tiny filtering units make up each kidney.
the name for the tiny blood vessels found in the lungs.
the muscles in the fingers that control fine motor movements.
the small bones in the inner ear that help with balance.
the cells that produce insulin in the pancreas.

Explanation:

Nephrons are the functional units of the kidney. They are responsible for filtering blood, reabsorbing necessary substances, and excreting waste as urine. Each kidney contains millions of nephrons. The other options describe different anatomical structures: tiny blood vessels in the lungs (capillaries in lungs - not nephrons), muscles in fingers (related to motor function - not nephrons), small bones in inner ear (ossicles - related to balance and hearing - not nephrons), cells producing insulin in pancreas (pancreatic islets - not nephrons).

Answer:

Millions of tiny filtering units make up each kidney.