HAP.6.2 Neurons Lesson

Introduction to the Neuron

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?

Multiple Choice

When you are in panic-mode, which nervous system takes over?

• peripheral

• sympathetic

• parasympathetic

• your parents'

Multiple Choice

How many sets of nerves are branching off your spinal cord that go to your body below your head

• 31

• 12

• 41

• 10

Multiple Choice

Which nervous system controls functions that you CANNOT control with your mind?

• parasympathetic

• sympathetic

• somatic

• autonomic

Multiple Choice

This nervous system allows you to control skeletal muscle

• autonomic

• sympathetic

• somatic

• parasympathetic

Multiple Choice

Your brain and spinal cord belong to the

• Central NS

• Peripheral NS

• Somatic NS

Labelling

Label the action potential graph

Drag labels to their correct position on the image

repolarization

resting (after stimulation)

Resting (before stimulation)

depolarization