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

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Multiple Choice

Which cells of the gastric glands secrete hydrochloric acid?

Parietal cells

G cells

Chief cells

Mucous neck cells

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Verified step by step guidance

Step 1: Understand the function of the gastric glands. Gastric glands are specialized structures in the stomach lining responsible for secreting various substances that aid in digestion, including enzymes, mucus, and hydrochloric acid (HCl).

Step 2: Identify the role of hydrochloric acid (HCl) in digestion. HCl creates an acidic environment in the stomach, which is essential for activating pepsinogen into pepsin (a digestive enzyme) and breaking down food particles.

Step 3: Learn about the specific cell types in the gastric glands. The gastric glands contain several types of cells, including parietal cells, chief cells, mucous neck cells, and G cells, each with distinct functions.

Step 4: Focus on parietal cells. Parietal cells are responsible for secreting hydrochloric acid (HCl) into the stomach lumen. They achieve this by actively transporting hydrogen ions (H⁺) and chloride ions (Cl⁻) to form HCl.

Step 5: Review the functions of the other cell types for comparison. Chief cells secrete pepsinogen, mucous neck cells produce mucus to protect the stomach lining, and G cells secrete gastrin, a hormone that stimulates HCl production by parietal cells.