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

21. The Immune System

Introduction to Innate Immunity

Anatomy & Physiology

21. The Immune System

Introduction to Innate Immunity

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Multiple Choice

Which term describes a discoloration of the skin and mucous membranes caused by a lack of oxygen?

Cyanosis

Pallor

Jaundice

Erythema

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Verified step by step guidance

Step 1: Understand the context of the question. The problem is asking for a term that describes a discoloration of the skin and mucous membranes caused by a lack of oxygen. This is a physiological condition related to oxygen transport and circulation.

Step 2: Review the definitions of the terms provided in the options: Cyanosis, Pallor, Jaundice, and Erythema. Each term represents a distinct type of skin discoloration caused by different physiological factors.

Step 3: Focus on Cyanosis. Cyanosis is characterized by a bluish discoloration of the skin and mucous membranes due to insufficient oxygen in the blood. This occurs when oxygen saturation levels drop significantly, leading to deoxygenated hemoglobin in the blood.

Step 4: Compare Cyanosis with the other options: Pallor refers to paleness of the skin, often caused by reduced blood flow or anemia; Jaundice is a yellowing of the skin and eyes due to elevated bilirubin levels; Erythema is redness of the skin caused by increased blood flow or inflammation.

Step 5: Based on the definitions, identify that Cyanosis is the term that specifically describes discoloration caused by a lack of oxygen. This matches the description provided in the question.