23. Digestive System

Gastric juice

Functional Anatomy: Stomach

Gastric Gland Secretion

 The main enzyme produced by the stomach is pepsin, which digests protein (gastric lipases are only of minor importance). 

 What are the main organic molecules digested in the stomach? 

 The gastric phase of gastric secretion occurs when the bolus of food enters the stomach and is not considered a conditioned reflex. 

 The intestinal phase of gastric secretion occurs when the stomach delivers chyme to the small intestines and is not considered a conditioned reflex. 

 There is no esophageal phase of gastric secretion. 

 Some aspects of the __________ phase of gastric secretion, which occur before food enters the stomach, may be considered conditioned reflexes. 

 Parietal cells make HCl and intrinsic factor. 

 Which of the following cells produce HCl? 

Digestive System Secretion

Control of the Digestive System

Anatomy & Physiology of the Stomach

 the stomach is initially stimulated and later inhibited  

 The stomach is initially stimulated and later inhibited. 

 the gastroenteric reflex reduces stomach activity 

 During the intestinal phase of gastric regulation, __________. 

Digestive System

The Digestive System

Parietal Cell Physiology

 temporary holding area for food until it can be moved to the duodenum 

 The stomach does not produce enzymes to digest carbohydrates. Carbohydrates are chemically digested by salivary amylase in the mouth and by pancreatic amylase in the small intestine. 

 absorption of a few fat-soluble substances 

 mechanical breakdown of the bolus into chyme 

 Which of the following is NOT a function of the stomach? 

Stomach Histology, Gastric Pits

Mechanism of HCL Secretion

 Pepsinogen is the inactive form of pepsin, which is produced by chief cells located in the basal region of gastric glands.  

 Which of the following cells produce pepsinogen? 

 Lipases digest fats, amylases digest carbohydrates, proteases (such as pepsin) digest proteins, and nucleases digest nucleic acids such as DNA and RNA. 

 Pepsin enzymatically digests __________. 

Anatomy Review Digestive 

Phases of Digestion – Gastrointestinal System | Lecturio

 The secretion of intrinsic factor is the only stomach function that is essential to life. 

 The only stomach function that is essential to life is __________. 

Control of the GI Tract: The Roles of Gastrin, CCK, Secretin, Motilin and Gastric Inhibitory Peptide

In order for the stomach to produce hydrochloric acid (HCl), H+ ions are pumped into the stomach. As H+ ions are pumped into the stomach, chloride ions (Cl– ions) are also passed into the stomach in exchange for bicarbonate (HCO3–) ions. This exchange reaction (called the chloride shift), in which Cl+ is exchanged for HCO3–, leads to an accumulation of alkaline bicarbonate in the blood. This causes a more alkaline pH in the blood that is collected from the stomach, a phenomenon called the alkaline tide.

The increased concentration of HCO3– in blood draining from the stomach is called __________.

Stomach

 cephalic phase, gastric phase, intestinal phase 

 gastric phase, cephalic phase, intestinal phase 

 The three phases of gastric secretion, in order, are called the cephalic (or reflex) phase, the gastric phase, and the intestinal phase. In the cephalic phase, the stomach prepares to receive food. In the gastric phase, gastric juices are released and chyme is churned in the stomach. In the intestinal phase, chyme is secreted into the small intestine.  

 intestinal phase, gastric phase, cephalic phase 

 cephalic phase, intestinal phase, gastric phase 

 The phases of gastric secretion, from first to last, are __________. 

Stomach Anatomy

Structure & Functions Of The Stomach

 HCl, IF, mucus, and pepsinogen (pepsin) are products of the stomach. 

 Which of the following products does the stomach produce? 

Learn the toughest concepts covered in Anatomy & Physiology 1&2 with step-by-step video tutorials and practice problems by world-class tutors



Anatomy & Physiology

https://static.studychannel.pearsonprd.tech/courses/anp/thumbnails/anp

#FFFFFF

Professor Dave Explains

Dr Matt & Dr Mike

Crash Course Anatomy & Physiology

EasyAandP

Lecturio Medical

Whats Up Dude

Catalyst University

Sam Webster

TheMedicalZone

Wallace's Anatomy and Physiology

Hussain Biology

1. Introduction to A&P

2. Chemistry

3. Cells

4. Tissues

5. Integumentary System

6. Bones + Skeletal Tissues

7. Skeletal System

8. Joints

9. Muscles and Muscle Tissue

10. Muscular System

11. Nervous Tissue

12. Central Nervous System

13. Peripheral Nervous System

14. Autonomic Nervous System

15. Special Senses

16. Endocrine System

17. Blood

18. Cardiovascular System: the Heart

19. Cardiovascular System: Blood Vessels

20. Lymphatic System

21. Immune System

22. Respiratory System

24. Nutrition, Metabolism, Energy Balance

25. Urinary System

26. Fluid and Electrolyte Balance, Acid Base Balance

27. Reproductive System

28. Pregnancy and Human Development

29. Heredity

undefined - Channels

Histologic anatomy of the liver and pancreas

Roles of bile and pancreatic juice in digestion

Regulation of bile and pancreatic juice secretion

Functional Anatomy: Liver and Pancreas

Pharynx and esophagus

Swallowing

Functional Anatomy: Pharynx and Esophagus

Stomach structure

Regulation of gastic secretion and stomach motility

Alkaline tide

The mouth: gross and microscopic anatomy, and basic functions

The dental formula, and deciduous and permanent teeth

Functional Anatomy: Mouth

Role of the gallbladder

Functional Anatomy: Gallbladder

Saliva and regulation of saliva

Functional Anatomy: Salivary Glands

Structural modifications of the small intestine wall

Cell types of the intestinal mucosa

Functions of intestinal hormones and paracrines

Functional Anatomy: Small Intestine

Digestive system, alimentary canal, and accessory digestive organs

Digestive system activity and processes

Peritoneum

Retroperitoneal organs

Alimentary canal

Stimuli and controls of digestive activity

Overview: General Features

Major functions of the large intestine

Regulation of defecation

Functional Anatomy: Large Intestine

Digestion and absorption processes

Digestive enzymes

Digestion end products

Absorption in the small intestine

Physiology of Digestion and Absorption

General Chemistry

Jules

Study the key concepts of Physics with descriptive videos, questions, and more

Physics

Patrick

General Biology

Jason

Financial Accounting

Brian

Dive deep into Psychology with videos, practice problems, and more.

Psychology

Microeconomics

The first in a two-course sequence introduces the basic structure and functions of the human body

College Algebra covers algebraic topics and skills necessary to succeed in college-level math

College Algebra

Organic Chemistry

Johnny

Genetics

Kylia

GOB Chemistry

Microbiology

Cell Biology

Analytical Chemistry

Study topics incliding trogonometric functions, identities and equations, solutions of triangles, complex numbers, and other topics as time permits

Trigonometry

Learn the toughest concepts covered in Precalculus with step-by-step video tutorials and practice problems by world-class tutors

Precalculus

Biochemistry

Macroeconomics

Chemistry

Biology

Math

Business

Social Sciences

Michelle Barry Franco

Building Great Presentations

Eric Zackrison, PhD

Critical Thinking And Problem Solving

Sam Bennett

Embracing Times Of Uncertainty

Nicole Tetreault, PhD

Emotional Intelligence Basics

Eugene Choi, PharmD

Enhancing Your Critical Thinking Skills

Jason Richardson, PsyD

Habits To Win Every Day

Alyssa Lowery, PhD

Having Powerful Advanced Conversations

Don Gilman, EdD

How To Influence & Persuade

Amy Matthews

Leadership Skills For Rising Stars

Listening To Lead

Michael Shermer, PhD

Making Decisions Under Uncertainty

Lynne Hurdle

Mistakes To Avoid When Resolving Conflict

Michael Veltri

Overcoming Decision Making Traps

Mike Vardy

Prioritizing Effectively

Secrets Of Effective Prioritization

Strategies To Build Up Your Creativity

Tools For Decision Making

Tutti Taygerly

Unleash And Advance Your Creativity

Winning Collaboration: How To Work More Effectively With Different Personalities

Writing Emails People Want To Read

Critical Thinking

Self Management