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 two ions are most affected by the hormone aldosterone?

Calcium and chloride

Hydrogen and bicarbonate

Sodium and potassium

Magnesium and phosphate

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Verified step by step guidance

Step 1: Begin by understanding the role of aldosterone. Aldosterone is a steroid hormone produced by the adrenal cortex that plays a key role in regulating electrolyte balance and blood pressure.

Step 2: Recognize that aldosterone primarily acts on the kidneys, specifically the distal tubules and collecting ducts, to regulate the reabsorption and secretion of certain ions.

Step 3: Identify the ions most affected by aldosterone. Aldosterone increases the reabsorption of sodium (Na⁺) into the bloodstream and promotes the excretion of potassium (K⁺) into the urine.

Step 4: Understand the physiological significance. Sodium reabsorption helps maintain blood pressure and fluid balance, while potassium excretion prevents hyperkalemia (excess potassium in the blood).

Step 5: Confirm that the correct answer is sodium and potassium, as these are the two ions directly regulated by aldosterone's action on the kidneys.