[Campbell Biology P.947] According to the provided diagram, what is the distinct function of... | Practice Question

According to the provided diagram, what is the distinct function of "protective secretions" in an animal's digestive system compared to "digestive secretions"?

  • A: Both types of secretions catalyze the breakdown of food.
  • B: Protective secretions aid in nutrient absorption, while digestive secretions prevent self-digestion.
  • C: Protective secretions separate body cells from digestive activity, whereas digestive secretions break down food.
  • D: Protective secretions transport nutrients, and digestive secretions transport waste.

Explanation

The diagram explicitly states: "Digestive secretions catalyze breakdown of food and release of nutrients" and "Protective secretions help separate body cells from digestive activity." This clearly delineates their distinct roles.