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

13. The Peripheral Nervous System

Reflex Arcs

Anatomy & Physiology

13. The Peripheral Nervous System

Reflex Arcs

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Multiple Choice

Inborn or intrinsic reflexes are best described as:

Reflexes that require conscious thought to initiate

Automatic responses to stimuli that are present at birth

Learned responses acquired through practice

Voluntary actions controlled by the cerebral cortex

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Verified step by step guidance

Step 1: Understand the concept of reflexes. Reflexes are automatic, involuntary responses to stimuli that help maintain homeostasis or protect the body from harm.

Step 2: Differentiate between inborn (intrinsic) reflexes and learned (acquired) reflexes. Inborn reflexes are present at birth and do not require prior experience or learning, while learned reflexes develop through practice and experience.

Step 3: Recognize that inborn reflexes are automatic and do not require conscious thought or voluntary control. These reflexes are mediated by neural pathways that bypass the cerebral cortex, involving the spinal cord or brainstem.

Step 4: Eliminate incorrect options. Reflexes requiring conscious thought or voluntary control are not intrinsic reflexes. Similarly, learned responses acquired through practice are not inborn reflexes.

Step 5: Conclude that the correct description of inborn or intrinsic reflexes is 'Automatic responses to stimuli that are present at birth.' This aligns with their definition and physiological mechanism.