Chapter 24: The Digestive System

This page contains all that you will need to study and link to for the eighth Lecture CT (Chapter Test) #8 Chapter 24.

ONGOING REMINDER: As you go through the semester you will notice that lecture does NOT support lab and the lab material will not support or prepare you for lecture content. Remember that this was the same for the Biology 233 100% online course. The reason: Lecture will usually explain physiology or functions and lab will be on anatomy or the structure or naming of parts.

Don't forget that you will be studying two areas -- Lecture and Lab-- at the same time on the same days (just as students do in the on campus Biology 234 course) throughout the entire semester. Actually that is why this course has two names 1-anatomy & 2-physiology. also, on campus classes meet in two separate rooms: lecture and laboratory.

This page is for lecture only. Laboratory activities for the week are on the laboratory page. Go back into UCompass and click on "Lab This Week" button.

This Lecture page and others throughout the semester will be the source for all that is available to help you learn the concepts and content for the chapter. IT WILL BE DIFFERENT FOR EACH lecture Chapter THROUGHOUT THE COURSE.

DO NOT USE other internet sites. They may have information not relevant to the chapter content you need to learn. Also, I placed source contacts on this one page as the central source to help save you time in linking to related material. However, if you want to waste time searching the Web for information go ahead, but don't say that I did not warn you that it will be a waste of your precious time. Yet, if you have time to waste then go ahead and Google the Web for information.


Chapter 24 ----OVERVIEW

The Digestive System

• The stomach is a storage site that provides time for the physical breakdown of food that must precede chemical digestion. Protein digestion begins in the acid environment of the stomach through the action of pepsin. Carbohydrate digestion, which began with the release of salivary amylase by the salivary glands before swallowing, continues for a variable period after food arrives in the stomach.
• The small intestine receives and raises the pH of materials from the stomach. It then absorbs water, ions, vitamins, and the chemical products released by the action of digestive enzymes produced by intestinal glands and the exocrine glands of the pancreas.
• The exocrine pancreas produces a mixture of buffers and enzymes essential for normal digestion. Pancreatic secretion occurs in response to the release of regulatory hormones (CCK and secretin) by the duodenum.
• The liver is the center for metabolic regulation in the body. It also produces bile that is stored in the gallbladder and ejected into the duodenum under the stimulation of CCK. Bile is essential for the efficient digestion of lipids; it breaks down large lipid droplets so that individual lipid molecules can be attacked by digestive enzymes.
• The large intestine stores digestive wastes and reabsorbs water. Bacterial residents of the large intestine are an important source of vitamins, especially vitamin K, biotin, and vitamin B5.

Learning Objectives & Competencies After successfully completing this chapter, you will be able to:
• Identify the organs of the digestive system and list their major functions.
• Describe the functional histology of the digestive tract.
• Explain the processes by which materials move through the digestive tract.
• Outline the mechanisms that regulate digestion.
• Describe the anatomy of the oral cavity.
• Discuss the functions of the major structures and regions of the oral cavity.
• Describe the anatomy and functions of the pharynx.
• Describe the anatomy and functions of the esophagus.
• Describe the anatomy of the stomach, its histological features, and its roles in digestion and absorption.
• Describe the anatomical and histological characteristics of the small intestine.
• Explain the functions of the intestinal secretions and discuss the regulation of secretory activities.
• Describe the structure, functions, and regulation of the accessory digestive organs.
• Describe the gross and histological structure of the large intestine.
• List the regional specializations of the large intestine.
• Explain the significance of the large intestine in the absorption of nutrients.
• Specify the nutrients required by the body.
• Describe the chemical events responsible for the digestion of organic nutrients.
• Describe the mechanisms involved in the absorption of organic and inorganic nutrients.
• Summarize the effects of the aging process on the digestive system.


Instruction & Assignments

Sources of Learning

Internet website "My A & P Place" to companion your hard copy textbook. Chapter Twenty Four
The Digestive System

Click on the photo (to the left) of the textbook. Next, you will see the same textbook cover on another page. Click it. Enter your name and other information you created when you entered the site to register for Chapter Seventeen. Continue into the text book's website to see their current material. However remember that accessing this link is not necessary for succeeding in this course. I have downloaded all that is relevant to the course and placed them as direct links on this page and all pages when appropriate throughout the course.

I will be linking you back to "My A & P Place" for each textbook chapter during the course.

Read Chapter 24 "The Digestive System" from your hard copy textbook.

It will help if you take summary notes during your reading of chapter 24.

Major concepts for Chapter 24: "The Digestive System" (click on image to left). Read these BEFORE starting chapter 24.
"Key Words" list. A collection of terms from the chapter to help your learning and understanding of the chapter and its content. It is useable for reviewing and studying for the chapter test or Lec CT.

Power Point Presentation.  These are designed to the sequence of a chapter's content.  It is another way of organizing, reviewing and learning the content required for this course.  Click on the icon to the left for a list of Power Point slides available for this chapter.  Also incleded are practice tests in a Power Point format.

Learning animations

These are Flash animations (usually) to show visuals of major concepts or mechanisms as you read chapter 24. (click picture on left)

Chapter Outlines & Chapter Overview Notes

These will give you chapter outlines that organize and focus on the core terms, ideas, and concepts for all chapters in the course

On campus Biology 234 Anatomy and Physiology II students DO NOT have access to anything in your course except this link. I am sharing it with you. It contains is a collection of various animations and videos that may or may not help you. If they don't then do not use this link again. This link will be different for every chapter.

Lecture - - Competencies and Tests
Labeling activities (drag and drop tests)
Try this link. I made some practice lecture test questions on this chapter that provide an immediate response to your answer. It is not graded and will not alter your course grade. The questions, though are intended to give you practice for matching test questions you will see on the Lecture CTs and the four major lecture exams. Practice, practice and practice usually is the best teacher and increases your chances of success. Click on the image.

Lecture Chapter Test 8 (Lec CT 8). This will cover your readings of chapter Twenty Four - The Digestive System. This Lec CT 8 is intended to test and sharpen your knowledge on the subjects in preparation for Lecture Exam 3. Below: click on calender of deadlines, activities and events. Notice the Lec CT 8 due date on the calendar. If the Lec CT 8 is submitted late, 2 points per late minute will be deducted automacically by the UCompass computer from your score. This is a graded but practice test to prepare you for the major lecture exam that covers this chapter as one of its chapters on that first major lecture exam.

To take the quiz: either close out these windows and look for your UCompass logged in window OR go to this link and reenter UCompass. After logging in to or relogging into the Biology 234 UCompass page then click on "Lecture CTs & Exams" button and then click on "Lec CT 8" to start your test. Read and FOLLOW THE DIRECTIONS ON THE NEW PAGE.

This chapter will be part of your Lecture Exam #3. Take notice as to the time and date of this final exam.
Set up a personal calendar of when to study and what to study. The Lecture Deadlines (below) has a printable calendar with this semester's schedule in it. There is plenty of space on it to add your own personal goals and deadlines.
Lecture Deadlines
Calender of deadlines, activities and events

The entire semester is here.

Print this page for reference and organization (use Landscape printer setting)