Actions of Digestive Secretions The breakdown of food into nutrients requires secretions from different organs or glands. Many of these secretions contain enzymes or other compounds that break down one or more of the macronutrients. Five secretions involved in the digestive process are listed below. Choose the macronutrient(s) that each secretion either breaks down or facilitates the breakdown of. Note that some secretions may support the breakdown of more than one macronutrient. Secretion Intestinal juice Gastric juice Pancreatic juice Saliva Bile Proteins O U [ Carbohydrates ■ U 00 Lipids ☐ U

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