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

A graded potential is strongest at the __________:

Initial zone of the axon.

Location on the membrane with the most voltage-gated potassium channels.

Site of stimulation.

Axolemma.

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Verified step by step guidance

Understand the concept of graded potentials: Graded potentials are changes in membrane potential that vary in size, as opposed to being all-or-none. They occur in the dendrites and cell body of a neuron.

Identify the site of stimulation: Graded potentials are initiated at the site where a stimulus is applied to the neuron, such as a neurotransmitter binding to a receptor or a mechanical stimulus.

Recognize the characteristics of graded potentials: They decrease in strength as they spread out from the point of origin due to the passive spread of current and the leakage of ions across the membrane.

Consider the axolemma: The axolemma is the plasma membrane of the axon, but graded potentials are strongest at the site of stimulation, not specifically at the axolemma unless the stimulation occurs there.

Clarify the role of voltage-gated channels: While voltage-gated potassium channels are important for action potentials, graded potentials are primarily influenced by ligand-gated or mechanically-gated channels at the site of stimulation.