Signals in the Nervous System
Grade 12th Grade · Science · 99 min
What's Included
Learning Objective
I can describe how the nervous system sends signals throughout the body.
Warm-Up Video
Science ABC · 7:01
What Are Neurons and How Do They Work?
Guided Notes
3 key concepts
- 1
Neurons convert information from our environment into electrical signals that are carried to the brain.
- 2
Each neuron has a cell body with smaller branches called dendrites that receive signals, and a longer branch called an axon that transmits signals.
- 3
A neuron fires a nerve impulse only when the total sum of input signals crosses a threshold potential of -55mV, causing depolarization of the neuron.
Practice Questions
12 questions · Multiple choice & Short answer
Exit Ticket
Quick comprehension check
“Describe the process by which a neuron generates a nerve impulse, including the roles of ion channels, depolarization, repolarization, and hyperpolarization.”
Complete Lesson Package
Get all 3 ready-to-use resources:
