[Campbell Biology P.1046] Which of the following is NOT one of the four fundamental processes... | Practice Question

Which of the following is NOT one of the four fundamental processes carried out by most excretory systems, as described in Concept 44.3?

  • A: Filtration
  • B: Reabsorption
  • C: Secretion
  • D: Digestion

Explanation

Concept 44.3 explicitly states that "Most excretory systems carry out filtration, reabsorption, secretion, and excretion." Digestion is a process carried out by the digestive system, not the excretory system. The excretory system's primary role is to filter blood, reabsorb useful substances, secrete wastes, and excrete the remaining filtrate as urine.