Physiology 1020 Lecture Notes - Lecture 15: Salivary Gland, Vitamin K, Bile Acid
8 Dec 2016
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Document Summary
Secretion: release of digestive fluids into the lumen of digestive tract (i. e. water, mucus, acid, electrolytes, enzymes, bile salts) Digestion: process by which food is broken down into smaller molecules by enzymes. Absorption: process by which these small molecules are taken up by circulation and distributed throughout the body (small int. ) Motility: movement of food through tract by contraction of smooth muscle that lines walls. Excretion: removal of unwanted waste products after almost all wanted products are absorbed. Food is broken down by mastication and saliva to form bolus. Saliva is composed of mostly water with ions and proteins and is secreted by. These glands produce up to 2l of saliva each day. Saliva begins digesting carbohydrates because it contains amylase. Ans controls production and secretion of saliva. Once the bolus has been formed, it will be pushed to the back of the mouth by the tongue and the swallowing reflex will begin.
