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

11. Nervous Tissue and Nervous System

Graded Potentials

Anatomy & Physiology

11. Nervous Tissue and Nervous System

Graded Potentials

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Multiple Choice

When a second EPSP arrives at a single synapse before the effects of the first have disappeared, what results?

Temporal summation.

Spatial summation.

Hyperpolarization.

Inhibition of the impulse.

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Verified step by step guidance

Understand the concept of Excitatory Postsynaptic Potential (EPSP): EPSPs are changes in the postsynaptic membrane potential that make the neuron more likely to fire an action potential. They are typically caused by the influx of positively charged ions into the postsynaptic cell.

Learn about temporal summation: Temporal summation occurs when multiple EPSPs are generated at the same synapse in rapid succession. If a second EPSP arrives before the first one has fully dissipated, their effects can add up, increasing the likelihood of reaching the threshold for an action potential.

Differentiate between temporal and spatial summation: Spatial summation involves multiple synapses firing simultaneously, whereas temporal summation involves multiple EPSPs at the same synapse over a short period.

Consider the effects of hyperpolarization: Hyperpolarization is the opposite of depolarization, making the neuron less likely to fire an action potential. It is not related to the arrival of multiple EPSPs.

Evaluate the concept of inhibition: Inhibition typically involves inhibitory postsynaptic potentials (IPSPs), which decrease the likelihood of an action potential. EPSPs, on the other hand, increase the likelihood of firing, so inhibition is not the result of multiple EPSPs.