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

16. The Endocrine System

Introduction to the Endocrine System

Anatomy & Physiology

16. The Endocrine System

Introduction to the Endocrine System

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Multiple Choice

Which pathophysiologic phenomenon may result in a diagnosis of Cushing disease?

Overproduction of parathyroid hormone

Excessive secretion of adrenocorticotropic hormone (ACTH) by the pituitary gland

Decreased secretion of thyroid hormones

Insufficient production of insulin by the pancreas

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Verified step by step guidance

Understand the context of Cushing disease: It is a condition caused by excessive cortisol levels in the body, often due to overproduction of adrenocorticotropic hormone (ACTH) by the pituitary gland.

Review the role of ACTH: ACTH is a hormone secreted by the anterior pituitary gland that stimulates the adrenal glands to produce cortisol. Excessive secretion of ACTH leads to overstimulation of the adrenal glands and elevated cortisol levels.

Eliminate incorrect options: Overproduction of parathyroid hormone is associated with calcium imbalance, not cortisol. Decreased secretion of thyroid hormones leads to hypothyroidism, and insufficient production of insulin by the pancreas results in diabetes mellitus. These are unrelated to Cushing disease.

Focus on the correct pathophysiologic mechanism: Excessive secretion of ACTH by the pituitary gland is the primary cause of Cushing disease, as it directly leads to increased cortisol production.

Summarize the diagnosis: The pathophysiologic phenomenon resulting in Cushing disease is the excessive secretion of ACTH by the pituitary gland, which causes hypercortisolism.