Show:
Parts of a Neuron
Organization
Use Your Brain
Action Potential
Reflexes
100

This is the part that controls the neuron and it's metabolic activities

Nucleus

100

This part of the nervous system lies confined to the cranium and vertebrae

Central Nervous System

100

This part of your brain sits at the very back between the occipital lobe and the brain stem

Cerebellum

100
What is another name for an action potential? 

Nerve impulse

100

Reflexes are described as this type of respons

Automatic

200

This is the longest extension of the neuron

Axon

200

This part of the nervous system is involved with gathering information and relaying it to the CNS

Sensory Division of the PNS

200

This is the part of your brain you are using as you think about this question...

Frontal

200

An action potential must reach this voltage before depolarization can occur

-55mV (Threshold)

200

The patellar reflex is also called this

The Knee-jerk reflex

300

Neurotransmitters are messengers. Which part of a neuron RECEIVES these?

dendrites

300

Things that you consciously control are relayed through this part of the PNS

Somatic Division

300

This gland is located at the center of your brain

Thalamus

300

The two major ions that are moving during an action potential are...

Na+ and K+

300

The withdrawal reflex is most often explained as when you withdraw your hand from something...

Hot

400

This part delineates the cell body from the axon

Axon hillock

400

This is in charge of fight-or-flight reponses

The Sympathetic Division
400

Don't leave me hanging...this is located at the base of your brain below the hypothalamus

Pituitary Gland

400

What is resting membrane potential? 

The voltage at which the membrane is NOT receiving stimulation or propagating an action potential (-70 mV)

400

All reflexes have what two structures? 

An Afferent (sensory) and Efferent (motor) nerve

500

What is the purpose of the Schwann Cell? 

Insulates and speeds up the transmission of an action potential

500

This division is in charge of ALL of the automatic responses in the body

Autonomic Division of the PNS

500

The brain stem is made of these two parts (Please put the SUPERIOR part FIRST)

Pons and Medulla Oblongata

500

Because it involves moving ions, the repolarization step often "over" shoots...this is called

Hyperpolarization

500

What is often found between sensory and motor neurons in a reflex? (The patellar does not have one, but the withdrawal does!)

Interneuron