NUTR 1030 1st Edition Lecture 5Outline of Last Lecture I. Understand the anatomy and physiology of the GI tractII. Understand the role of each organ during digestionIII. Identify important secretory substances that aid in digestionIV. Identify differences between Probiotics and PrebioticsOutline of Current Lecture I. Understand the process of absorptionII. Identify where primary nutrients are absorbed in the bodyIII. Differentiate between the role of the cardiovascular and lymphatic systems in absorptionCurrent LectureAbsorption:Primarily occurs in small intestineDiffusion- Passive diffusion- depends on a concentration gradient- Facilitated diffusion- both concentration gradient + carrier proteinActive- Carrier protein + energy neededEndocytosis- Engulfment of compounds or liquidsWhat is absorbed, and where?These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Stomach-- Alcohol (20% of total)- Water (minor amount)Small Intestine- - Calcium, magnesium, and other minerals- Glucose- Amino acids- Fats- Vitamins- Water (70-90% of total)- Alcohol (80% of total)- Bile acidsLarge Intestine-- Sodium- Potassium- Some fatty acids- Vitamin K and Biotin- Gases - Water (10-30% of total)Moving Nutrients ‘Into’ the Body:Cardiovascular System- includes heart, blood vessels and blood- Water-soluble nutrients transported via capillaries in villi into the portal vein- Portal vein carries nutrients to the liver- Liver is the “clearinghouse” and decides what to do with each nutrient- Those nutrients sent into the blood travel to the heart and are pumped throughout the bodyLymphatic System- includes lymph- Fat-soluble nutrients and large particles transported via lacteals into the lymph vessels to thoracic duct- The nutrients enter the blood stream- Cells in the periphery can obtain these nutrients directly from blood- Remainder of nutrients eventually make it to the liver and are