Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

23. The Digestive System

Introduction to the Digestive System

Anatomy & Physiology

23. The Digestive System

Introduction to the Digestive System

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Which of the following secretions converts pepsinogen to pepsin in the digestive system?

Bile

Pancreatic lipase

Salivary amylase

Hydrochloric acid

Previous problemNext problem

Verified step by step guidance

Understand the role of pepsinogen in the digestive system: Pepsinogen is an inactive enzyme precursor secreted by the chief cells in the stomach lining.

Recognize the function of pepsin: Pepsin is an active enzyme that breaks down proteins into smaller peptides in the stomach.

Identify the process of activation: Pepsinogen is converted into pepsin through a process called proteolytic activation, which involves the cleavage of specific peptide bonds.

Determine the agent responsible for activation: Hydrochloric acid (HCl), secreted by the parietal cells in the stomach, provides the acidic environment necessary for the conversion of pepsinogen to pepsin.

Conclude the role of hydrochloric acid: By lowering the pH of the stomach, hydrochloric acid facilitates the conversion of pepsinogen to its active form, pepsin, enabling protein digestion to occur efficiently.