Excretory System

Question 1

• Filter blood to remove waste and excess substances.
• Regulate water, salt, and pH balance.

Answer 1

Kidneys

Question 2

• Functional units of the kidney.

Each _ filters blood, reabsorbs necessary substances, and secretes waste into the urine

Answer 2

Nephron

Question 3

• Blood is filtered in the glomerulus to produce filtrate
• Large molecules like proteins and blood cells are retained

Answer 3

Ultrafiltration

Question 4

• Water, glucose, and ions are reabsorbed from the filtrate back into the blood

Answer 4

Reabsorption

Question 5

• Excess ions and waste products are secreted from the blood into the filtrate

Answer 5

Secretion

Question 6

• Filtrate becomes urine in the renal tubules after filtration, reabsorption, and secretion

Answer 6

Urine Formation