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

14. The Autonomic Nervous System

Parasympathetic Nervous System

Anatomy & Physiology

14. The Autonomic Nervous System

Parasympathetic Nervous System

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Multiple Choice

Which of the following statements is true of the parasympathetic nervous system (PNS)?

It increases heart rate and dilates pupils.

It is responsible for the fight or flight response.

It uses norepinephrine as its primary neurotransmitter at target organs.

It promotes rest and digest activities in the body.

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Verified step by step guidance

Step 1: Begin by understanding the parasympathetic nervous system (PNS). The PNS is a division of the autonomic nervous system responsible for regulating 'rest and digest' activities, such as reducing heart rate, promoting digestion, and conserving energy.

Step 2: Compare the functions of the PNS with the sympathetic nervous system (SNS). The SNS is responsible for 'fight or flight' responses, such as increasing heart rate, dilating pupils, and preparing the body for action. This distinction helps eliminate incorrect options.

Step 3: Analyze the neurotransmitters used by the PNS. The primary neurotransmitter at target organs for the PNS is acetylcholine, not norepinephrine. Norepinephrine is primarily used by the SNS, which further eliminates another incorrect option.

Step 4: Evaluate the statement 'It promotes rest and digest activities in the body.' This aligns with the known functions of the PNS, such as stimulating digestion, reducing heart rate, and promoting relaxation.

Step 5: Conclude that the correct answer is the statement that describes the PNS as promoting rest and digest activities, based on its physiological role and neurotransmitter usage.