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

As blood passes through actively contracting skeletal muscle, which of the following changes is most likely to occur?

Glucose concentration in the blood increases

Oxygen levels in the blood decrease

Carbon dioxide levels in the blood decrease

Blood pH increases

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Verified step by step guidance

Understand the physiological context: Actively contracting skeletal muscle requires energy, which is primarily derived from glucose and oxygen. This process involves cellular respiration, where oxygen is consumed and carbon dioxide is produced.

Analyze oxygen levels: During muscle contraction, oxygen is utilized by muscle cells for aerobic respiration. This leads to a decrease in oxygen levels in the blood passing through the muscle.

Analyze carbon dioxide levels: As oxygen is consumed, carbon dioxide is produced as a byproduct of cellular respiration. This results in an increase in carbon dioxide levels in the blood passing through the muscle.

Consider blood pH: The increase in carbon dioxide levels leads to the formation of carbonic acid (H₂CO₃) in the blood, which dissociates into hydrogen ions (H⁺) and bicarbonate ions (HCO₃⁻). The presence of more hydrogen ions lowers the blood pH, making it more acidic rather than increasing it.

Evaluate glucose concentration: Glucose is consumed by muscle cells to generate ATP during contraction. Therefore, glucose concentration in the blood decreases rather than increases as it is utilized for energy production.