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 Heart2h 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

11. Nervous Tissue and Nervous System

Graded Potentials

Anatomy & Physiology

11. Nervous Tissue and Nervous System

Graded Potentials

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Multiple Choice

An excitatory postsynaptic potential (EPSP) is __________.

the same as a nerve impulse along an axon.

a result of a stimulus strong enough to produce threshold.

a graded depolarization produced by the arrival of a neurotransmitter.

an action potential complying with the all-or-none principle.

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Verified step by step guidance

Understand the concept of an excitatory postsynaptic potential (EPSP). An EPSP is a temporary depolarization of the postsynaptic membrane potential caused by the flow of positively charged ions into the postsynaptic cell.

Recognize that EPSPs are graded potentials, meaning their magnitude can vary depending on the strength of the stimulus. They are not all-or-none responses like action potentials.

Identify the role of neurotransmitters in generating EPSPs. When a neurotransmitter binds to receptors on the postsynaptic membrane, it can open ion channels, allowing ions to flow and causing depolarization.

Differentiate between EPSPs and action potentials. EPSPs can lead to action potentials if they are strong enough to reach the threshold potential, but they themselves are not action potentials.

Conclude that an EPSP is a graded depolarization produced by the arrival of a neurotransmitter, which can contribute to reaching the threshold for an action potential if multiple EPSPs summate.