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

In which part of the gastrointestinal tract are acidophiles most likely to be found?

Small intestine

Esophagus

Stomach

Large intestine

Previous problemNext problem

Verified step by step guidance

Understand the term 'acidophiles': Acidophiles are organisms that thrive in acidic environments, typically with a pH below 5. They are adapted to survive and grow in conditions that would be hostile to most other organisms.

Identify the pH levels of different parts of the gastrointestinal tract: The stomach is known for its highly acidic environment, with a pH ranging from 1.5 to 3.5 due to the secretion of hydrochloric acid. This makes it the most acidic part of the gastrointestinal tract.

Compare the pH levels: The small intestine has a more neutral to slightly alkaline pH, typically around 6 to 7.5, due to the presence of bicarbonate ions. The esophagus generally has a neutral pH, close to 7, as it is primarily a conduit for food. The large intestine has a slightly acidic to neutral pH, around 5.5 to 7, due to bacterial fermentation.

Determine the environment suitable for acidophiles: Given the pH levels, acidophiles are most likely to be found in the stomach, where the acidic conditions are ideal for their growth and survival.

Conclude the reasoning: Based on the understanding of pH levels and the definition of acidophiles, the stomach is the correct answer as it provides the necessary acidic environment for acidophiles to thrive.