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

1. Introduction to Anatomy & Physiology

Introduction to Organ Systems

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Introduction to Organ Systems

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Multiple Choice

Which statement correctly describes how smooth muscle is controlled?

Smooth muscle is not influenced by hormones.

Smooth muscle is primarily controlled by the autonomic nervous system.

Smooth muscle contracts only in response to conscious thought.

Smooth muscle is under voluntary control like skeletal muscle.

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Verified step by step guidance

Step 1: Understand the basic characteristics of smooth muscle. Smooth muscle is a type of involuntary muscle found in the walls of hollow organs (e.g., blood vessels, intestines, bladder). It is not under conscious control, unlike skeletal muscle.

Step 2: Review the role of the autonomic nervous system (ANS). The ANS is responsible for regulating involuntary functions in the body, including the contraction and relaxation of smooth muscle. It consists of the sympathetic and parasympathetic divisions, which influence smooth muscle activity.

Step 3: Consider the influence of hormones on smooth muscle. Hormones such as adrenaline, oxytocin, and others can affect smooth muscle contraction by binding to specific receptors on the muscle cells, altering their activity.

Step 4: Eliminate incorrect statements. Smooth muscle is not under voluntary control like skeletal muscle, nor does it contract only in response to conscious thought. Additionally, smooth muscle is influenced by hormones, so the statement that it is not influenced by hormones is incorrect.

Step 5: Identify the correct statement. Based on the characteristics of smooth muscle and its regulation by the autonomic nervous system, the correct description is: 'Smooth muscle is primarily controlled by the autonomic nervous system.'