Neurons
What does a neuron do?
They receive information and send it to your body and brain
What does CNS stand for?
Central nervous system
Yes
What does MND stand for
Motor Neuron Disease
Roughly how many neurons are in the body?
85 billion
What does PNS stand for
Peripheral nervous system
How can we test reaction times
ruler drop, reaction time game
Name 2 symptoms of MND
First noticed symptoms:
Weakness in hands and grip
Slurred speech
Weak legs, tripping more
Weak shoulders - difficulty lifting
Cramps, twitching muscles
Later symptoms:
Little or no movement (paralysed)
Have trouble talking, breathing and swallowing (due to muscle weakness)
What is the role of the dendrite
Branches that receive messages from other neurons.
What 2 parts of the body make up the Central Nervous system
Brain and spinal cord
A conscious response requires a decision to be made, and the resulting action can be different each time.
What does MS stand for
Multiple Scelorsis
What is Myelin Sheath?
A fatty covering around the axon that helps messages travel faster and safer.
What is a synapse?
The gap between neurons
Give an example of a reflex
touching something hot, knee jerk
What part of the neuron is being destroyed from Multiple Sclerosis
Myelin Sheath
What is a neurotransmitter?
the body's chemical messengers. They carry signals from one neuron to another
The PNS sends signals via neurotransmitters to the CNS, the CNS receives the signal and sends an action signal to the body to lift the foot.
What can impact a persons reaction times
Focus, age, underlying condition
How many people in Australia are diagnosed with MND every year
2000