Introduction to the Neuron

Introduction to the Neuron

Dr. Melvin PLTW HBS

What is the Neuron?

• Nerve cell

• Conducts signals, electrical charge across cell membrane

Poll

How many neurons are in your brain?

• 100 million

• 100 billion

• 100 trillion

Neurons = Specialized cells

• Responds to stimuli

• Processes information

• Produces an appropriate response

Anatomy and Physiology of the Neuron

(example shown is a motor neuron)

Three types of neurons

• Sensory neurons (Afferent)

• Motor neurons (Efferent)

• Association neurons (Also known as Interneurons)

Multiple Select

Test yourself! What is the function of a motor neuron? (more than 1 answer)

• Relays messages from the brain to the muscle/organ

• Acts as a mediator between the other two neurons

• Causes action/movement

• Sends messages from muscle/organ to the brain

Poll

You SEE a HUGE spider! What is the first thing you do?

• RUN!

• SCREAM!

• SQUASH IT!

• Rescue it (move it from harm)

• Take a picture of it

Open Ended

Explain the process of your selection. What did you select? Which part(s) of your anatomy are used?