Upper Gastrointestinal Secretion

by Thad Wilson, PhD

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    Hello! Today we’re going to talk about upper GI secretions. For this particular lecture, we have a number of learning goals to obtain. The first one is we will learn the constituents and the mechanisms of salivary secretions and how salivary glands are controlled and regulated. Also, we will learn the constituents of gastric secretions. Finally, we’ll be able to understand the mechanisms of hydrogen ion secretion from parietal cell, as well as the control and regulation of those parietal cells. We will emphasize how this knowledge then is applied to pharmacology as we approach the task to reduce gastric acid secretion. So let’s get right into it. The first thing that we’re going to talk about is some of the functions of the GI system, and this helps us to regulate not only our functions now, but integrate that into what we’ve already covered. We’re going to focus on the upper portion of the GI tract. Particular here, we’re going to talk about the mouth, the salivary glands which will hydrolyze and lubricate food stuff. And then finally, the stomach which will act as a blender. But here, what will be more important will be the secretion of acid to sterilize the food stuff. Again, we have the mouth, the salivary glands, and the stomach to talk about. So, salivary secretions. Why do we have salivary secretions? One of the first most important aspects is it helps protect the oral cavity. So oral cavity protection is very important and we’ll go through which items do that in the constituents. It also helps to lubricate food, helps in the digestion of food, especially carbohydrates and fats. And what are salivary secretions and where do they come from? Well, the first thing that we need to think about is the parotid...

    About the Lecture

    The lecture Upper Gastrointestinal Secretion by Thad Wilson, PhD is from the course Gastrointestinal Physiology. It contains the following chapters:

    • Upper Gastrointestinal Secretion
    • Structure and Functions - Salivary Glands
    • Control and Regulation - Salivary Glands
    • Structure and Functions - Gastric Gland
    • Control and Regulation - Gastric Oxyntic Gland
    • Learning Outcomes

    Included Quiz Questions

    1. Potassium
    2. Bicarbonate
    3. Chloride
    4. Sodium
    1. Vasoactive intestinal peptide
    2. Norepinephrine
    3. Neuropeptide Y
    4. ATP
    1. Sodium
    2. Potassium
    3. Hydrogen ion
    4. Chloride
    1. Chief cells
    2. G cells
    3. D cells
    4. Parietal cells
    1. Gastrin
    2. Prostaglandin E2
    3. Somatostatin
    4. Acetylcholine

    Author of lecture Upper Gastrointestinal Secretion

     Thad Wilson, PhD

    Thad Wilson, PhD

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    By Jonas A. on 17. May 2017 for Upper Gastrointestinal Secretion

    i lke very much,really!! excellent class. the professor is really good