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

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Anatomy & Physiology

1. Introduction to Anatomy & Physiology

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Multiple Choice

Which of the following is an example of an unconditioned response in a reflex arc?

Jumping at the sound of a loud noise

Blinking in response to a bright light

Salivating when food is placed in the mouth

Learning to ride a bicycle

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Verified step by step guidance

Understand the concept of a reflex arc: A reflex arc is a neural pathway that controls a reflex action. It typically involves a sensory neuron, an interneuron, and a motor neuron, resulting in an automatic response to a stimulus.

Identify the components of a reflex arc: The key components include the receptor (which detects the stimulus), the sensory neuron (which transmits the signal to the central nervous system), the integration center (usually the spinal cord or brain), the motor neuron (which carries the signal away from the central nervous system), and the effector (which produces the response).

Define an unconditioned response: An unconditioned response is an automatic, involuntary reaction to a stimulus that does not require prior learning or conditioning. It is a natural response that occurs without conscious thought.

Analyze the examples given: 'Jumping at the sound of a loud noise' and 'Blinking in response to a bright light' are both reflexive actions, but they are not unconditioned responses in the context of a reflex arc. 'Salivating when food is placed in the mouth' is a classic example of an unconditioned response, as it is an innate reaction to the presence of food.

Conclude with the correct example: Based on the definition and analysis, 'Salivating when food is placed in the mouth' is the correct example of an unconditioned response in a reflex arc, as it is an automatic and natural reaction to the stimulus of food.