Question

Digestive secretions are secreted only when needed. Discuss​

Answer 1

Answer:

Hello mate

Explanation:

Though saliva is secreted all the time but it is only gets activated from one starts consuming food. Similarly, digestive enzymes are not secreted all the time, when any food particle enters into te gut. The process of secretions gets initiated. But the liver keeps on secreting bile even if there is no food.