What are the 4 steps of digestion in order?
There are four steps in the digestion process: ingestion, the mechanical and chemical breakdown of food, nutrient absorption, and elimination of indigestible food.
What are the steps of triglyceride digestion and absorption?
After ingested triglycerides pass through the stomach and into the small intestine, detergents called bile salts are secreted by the liver via the gall bladder and disperse the fat as micelles. Pancreatic enzymes called lipases then hydrolyze the dispersed fats to give monoglycerides and free fatty acids.
What is the process of digestion and absorption of carbohydrates?
The goal of carbohydrate digestion is to break down all disaccharides and complex carbohydrates into monosaccharides for absorption, although not all are completely absorbed in the small intestine (e.g., fiber). Digestion begins in the mouth with salivary amylase released during the process of chewing.
What is the process of lipid digestion and absorption through the digestive system?
The digestive process has to break those large droplets of fat into smaller droplets and then enzymatically digest lipid molecules using enzymes called lipases. The mouth and stomach play a small role in this process, but most enzymatic digestion of lipids happens in the small intestine.
What are the different steps involved in absorption of gases?
The process of gas absorption thus involves the diffusion of solute from the gas phase through a stagnant or non-diffusing liquid. There are 2 types of absorption processes: physical absorption and chemical absorption, depending on whether there is any chemical reaction between the solute and the solvent (absorbent).
What is the first step to begin digestion?
The first step of the digestive process occurs before food even enters your mouth. Once you smell or see food that you plan to eat, you begin to salivate, and the digestive process begins. Once food enters your mouth, your teeth and tongue begin breaking it apart; this second step is a form of mechanical digestion.
Where does fat begin digestion in the body?
As with carbohydrates, there is an enzyme in the mouth that starts fat digestion. This continues in the stomach , as physical churning begins to emulsify the fats. The real work is done in the small intestines where bile is secreted from the gallbladder to break large fat globules into smaller ones.
What are the final steps of digestion?
The final step in digestion is the elimination of undigested food content and waste products. After food passes through the small intestine, the undigested food material enters the colon, where most of the water is reabsorbed.
What is the first stage of digestion?
The first stage of digestion is Mastication or the chewing of food. Your teeth and saliva begin to break it down. Alpha- Amylase , an enzyme in saliva, breaks food down into a soft mass called a Bolus. It also makes the Bolus slippery so that it can move from the tongue through a tube called the esophagus.