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

4. Tissues & Histology

Introduction to Muscle Tissue

Anatomy & Physiology

4. Tissues & Histology

Introduction to Muscle Tissue

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Multiple Choice

Which selection correctly describes the role of calcium in signal transduction during cell communication?

Calcium is responsible for transporting proteins across the cell membrane.

Calcium functions as an energy source for cellular activities.

Calcium acts as a second messenger that activates various cellular processes.

Calcium serves as a primary messenger that directly binds to DNA to initiate transcription.

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Verified step by step guidance

Understand the concept of signal transduction: Signal transduction is the process by which a cell responds to external signals, often involving a series of molecular events that lead to a cellular response.

Identify the role of calcium in signal transduction: Calcium ions (Ca²⁺) are crucial in many cellular processes, acting as a second messenger in signal transduction pathways.

Differentiate between primary and secondary messengers: Primary messengers are external signals like hormones, while secondary messengers, such as calcium, relay signals inside the cell to trigger a response.

Recognize how calcium functions as a second messenger: Calcium ions can activate various proteins and enzymes within the cell, leading to changes in cellular activity, such as muscle contraction, neurotransmitter release, and gene expression.

Clarify why calcium does not directly bind to DNA: Calcium acts indirectly by activating proteins that can influence gene expression, rather than binding directly to DNA to initiate transcription.