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

18. The Heart

Electrical Conduction System of the Heart

Anatomy & Physiology

18. The Heart

Electrical Conduction System of the Heart

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

Which medication reduces the workload of the heart by treating abnormal heart rhythms?

Diuretics

Beta-blockers

Calcium channel blockers

ACE inhibitors

Previous problemNext problem

Verified step by step guidance

Understand the function of each medication type: Diuretics help remove excess fluid from the body, reducing blood pressure but not directly affecting heart rhythms. Calcium channel blockers relax blood vessels and can affect heart rate, but their primary function is not rhythm control. ACE inhibitors lower blood pressure by inhibiting the conversion of angiotensin I to angiotensin II, but they do not directly address heart rhythms.

Focus on beta-blockers: These medications work by blocking the effects of adrenaline on the heart, which slows down the heart rate and reduces the force of contraction, effectively reducing the workload of the heart.

Recognize the role of beta-blockers in treating abnormal heart rhythms: Beta-blockers are commonly used to manage arrhythmias by stabilizing the heart rate and rhythm, making them suitable for reducing the workload of the heart.

Consider the mechanism of action: Beta-blockers decrease heart rate and contractility, which lowers myocardial oxygen demand and helps in managing conditions like atrial fibrillation or tachycardia.

Conclude that beta-blockers are the correct choice for reducing the workload of the heart by treating abnormal heart rhythms, as they directly address the heart's rhythm and workload.