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

Which of the following is a possible effector in a reflex arc?

Skeletal muscle

Cerebral cortex

Liver

Thyroid gland

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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 receptor, a sensory neuron, an integration center, a motor neuron, and an effector.

Identify the role of an effector in a reflex arc: The effector is the component that carries out the response to the stimulus. It is usually a muscle or gland that acts in response to the motor neuron signals.

Consider the options given: Skeletal muscle, Cerebral cortex, Liver, Thyroid gland.

Evaluate each option: Skeletal muscle is a common effector in reflex arcs, as it can contract in response to neural signals. The cerebral cortex is part of the brain involved in higher functions, not typically an effector in reflex arcs. The liver and thyroid gland are organs involved in metabolic processes, not direct effectors in reflex arcs.

Conclude which option is a possible effector: Based on the evaluation, skeletal muscle is the correct answer as it directly acts in response to motor neuron signals in a reflex arc.