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

Parietal cells also produce intrinsic factor, a molecule that binds which vitamin in the stomach lumen?

Vitamin C

Vitamin B12

Vitamin K

Vitamin D

Previous problemNext problem

Verified step by step guidance

Understand the role of parietal cells: Parietal cells are specialized cells in the stomach lining that produce hydrochloric acid (HCl) and intrinsic factor, which is essential for vitamin absorption.

Learn about intrinsic factor: Intrinsic factor is a glycoprotein secreted by parietal cells that binds specifically to vitamin B12 in the stomach lumen, protecting it from degradation and facilitating its absorption in the small intestine.

Review the importance of vitamin B12: Vitamin B12 is crucial for red blood cell formation, DNA synthesis, and neurological function. Without intrinsic factor, vitamin B12 cannot be absorbed effectively, leading to conditions like pernicious anemia.

Eliminate incorrect options: Vitamin C, Vitamin K, and Vitamin D do not require intrinsic factor for absorption. These vitamins have different absorption mechanisms and functions in the body.

Conclude the correct answer: Based on the function of intrinsic factor and its specific role in binding vitamin B12, the correct answer is Vitamin B12.