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Ch. 12 - The Nervous System I: Neurons and Neuronal NetworksWorksheetSee all chapters
All Chapters
Ch. 1 - Introduction to Physiology
Ch. 2 - Molecules and Molecular Interactions
Ch. 3 - Cells and Tissues
Ch. 4 - Cell Metabolism: Bioenergetics, Enzymes, and Respiration
Ch. 5 - Membrane Dynamics
Ch. 6 - Cell Communication
Ch. 7 - Integumentary System
Ch. 8 - Bone and Cartilage
Ch. 9 - Skeletal System
Ch. 10 - Joints
Ch. 11 - Muscles
Ch. 12 - The Nervous System I: Neurons and Neuronal Networks
Ch. 13 - The Nervous System II: The Central Nervous System
Ch. 14 - The Autonomic Nervous System
Ch. 15 - Sensory Physiology
Ch. 16 - The Endocrine System
Ch. 17 - Cardiovascular Physiology I: The Heart
Ch. 18 - Cardiovascular Physiology II: Blood, Blood Vessels, Circulation, and Exchange
Ch. 19 - The Urinary System
Ch. 20 - Respiratory Physiology
Ch. 21 - Acid-Base Balance-- Controlling Blood pH
Ch. 22 - Introduction to the Immune System
Ch. 23 The Lymphatic System
Ch. 23 - The Digestive System
Ch. 24 - Regulation of Metabolism and Energy Balance
Ch. 25 - Human Sexual Reproduction and Development

Concept #1: The Refractory Period(s)

Concept #2: The Refractory Period and Unidirectional Spread of APs

Practice: You have a big neuron siting in a dish. You stick an electrode into the middle of the axon and depolarize it. Identify each of the following as true or false. For each, why? 

1) The AP spreads toward the axon terminal/synapse. 

2) The AP spreads toward the cell body.

Practice: Amiodarone is a drug that blocks voltage-gated K+ channels. Assuming complete blockage of voltage-gated K+ channels, which of the following will be prolonged in a neuron treated with amiodarone?