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

If ACTH (adrenocorticotropic hormone) secretion is inhibited, which of the following is most likely to occur?

Decreased cortisol production by the adrenal cortex

Enhanced release of thyroid hormones

Elevated blood glucose levels due to increased glucagon

Increased secretion of aldosterone

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Verified step by step guidance

Step 1: Understand the role of ACTH (adrenocorticotropic hormone). ACTH is secreted by the anterior pituitary gland and stimulates the adrenal cortex to produce and release cortisol, a glucocorticoid hormone involved in stress response, metabolism, and immune regulation.

Step 2: Analyze the effect of inhibited ACTH secretion. If ACTH secretion is inhibited, the adrenal cortex will not receive the necessary stimulation to produce cortisol, leading to decreased cortisol levels in the body.

Step 3: Evaluate the options provided in the question. Consider how decreased ACTH secretion impacts each option: (a) Decreased cortisol production by the adrenal cortex, (b) Enhanced release of thyroid hormones, (c) Elevated blood glucose levels due to increased glucagon, and (d) Increased secretion of aldosterone.

Step 4: Eliminate options that are unrelated to ACTH inhibition. For example, thyroid hormone release is regulated by TSH (thyroid-stimulating hormone), not ACTH. Similarly, glucagon secretion is primarily regulated by blood glucose levels, and aldosterone secretion is influenced by the renin-angiotensin system rather than ACTH.

Step 5: Conclude that the most likely outcome of inhibited ACTH secretion is decreased cortisol production by the adrenal cortex, as cortisol synthesis is directly dependent on ACTH stimulation.