From 323089b58db6228e8bf140ad2494360a1aac8d7e Mon Sep 17 00:00:00 2001 From: zleyyij <75810274+zleyyij@users.noreply.github.com> Date: Tue, 24 Sep 2024 21:24:37 -0600 Subject: [PATCH] vault backup: 2024-09-24 21:24:37 --- education/nutrition/Digestive System.md | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/education/nutrition/Digestive System.md b/education/nutrition/Digestive System.md index 64348c6..ef60b32 100644 --- a/education/nutrition/Digestive System.md +++ b/education/nutrition/Digestive System.md @@ -58,7 +58,10 @@ Chemical digestion refers to the breakdown of large molecules in food into small - Enzymes usually end in -ase and begin with the name of whatever they are working to digest: - Amylase digests amylose - Maltase digests maltose - +# Nutrient Absorption +- **Simple Diffusion**: Occurs when the concentration of a particular nutrient is higher in one area than an other. This form of transport does not require energy input. Many water-soluble vitamins, lipids, and some minerals are absorbed in the digestive tract by simple diffusion. +- **Facilitated Diffusion**: Enterocytes absorb some nutrients by facilitated diffusion, another process that does not require energy. Although the nutrient moves down its concentration gradient, it still needs to be carried by a special transport protein within the membrane of the enterocyte. Absorption of simple sugar fructose occurs by facilitated diffusion +- **Active Transport**: Some nutrients move from the lumen of the intestine and into an enterocyte against the concentration gradient; that is, from low to high concentration. Absorption of these nutrients requires both a unique transport protein and energy. Enterocytes rely on active transport to absorb glucose and amino acids. # Definitions | Phrase | Definition |