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Questions and Answers
What is the basic unit of the nervous system?
What is the basic unit of the nervous system?
- Neuron (correct)
- Nerve cell
- Axon
- Dendrite
What are the special extensions of a neuron called?
What are the special extensions of a neuron called?
- Dendrites (correct)
- Cell bodies
- Axons
- Nerves
Which type of neurons transmit messages from the brain to the muscles to generate movement?
Which type of neurons transmit messages from the brain to the muscles to generate movement?
- Sensory neurons
- Projection neurons
- Interneurons
- Motor neurons (correct)
What are the bundles of axons called?
What are the bundles of axons called?
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How many neurons are present in the human brain approximately?
How many neurons are present in the human brain approximately?
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Study Notes
Nervous System Basics
- The basic unit of the nervous system is the neuron.
Neuron Structure
- Special extensions of a neuron are called dendrites, cell body, axon, and terminals.
Types of Neurons
- Motor neurons transmit messages from the brain to the muscles to generate movement.
Axon Bundles
- Bundles of axons are called nerve fibers.
Human Brain Composition
- The human brain contains approximately 100 billion neurons.
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