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

2. Cell Chemistry & Cell Components

Proteins

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Proteins

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 protein makes up the thick filaments in the sarcomere according to the sliding filament theory?

Tropomyosin

Myosin

Troponin

Actin

Previous problemNext problem

Verified step by step guidance

Understand the structure of the sarcomere, which is the basic unit of a muscle's striated muscle tissue. It is composed of thick and thin filaments.

Identify the proteins involved in the sarcomere. The thick filaments are primarily composed of the protein myosin, while the thin filaments are primarily composed of actin.

Learn about the sliding filament theory, which explains how muscles contract. According to this theory, myosin heads bind to actin filaments and pull them, causing the sarcomere to shorten and the muscle to contract.

Differentiate between the roles of tropomyosin and troponin. Tropomyosin covers the binding sites on actin, while troponin regulates the position of tropomyosin and thus the exposure of the binding sites.

Conclude that myosin is the protein that makes up the thick filaments in the sarcomere, playing a crucial role in muscle contraction as described by the sliding filament theory.