Question

Digestion within a digestive tract is

• A. Incomplete
• B. Extracellular
• C. The same as absorption
• D. Intracellular

Answer 1

The correct option is B Extracellular

• Extracellular digestion is a process in which saprobionts feed by secreting enzymes through the cell membrane onto the food.
• The enzymes catalyze the digestion of the food into molecules small enough to be taken up by passive diffusion, transport or phagocytosis.
• Intracellular digestion is a form of digestion wherein the breaking down of materials into smaller components takes place inside the cell.
• An incomplete digestive system has only one opening. The food goes in the same opening that the waste comes out.
  

Therefore, the correct answer is option B.