Show:
Neurons
PNS
CNS
CNS (continue)
Reflex arc
100
What is the longest part of the neuron?
The axon
100
What does PNS stand for?
Peripheral Nervous System.
100
What does CNS stand for?
Central Nervous System
100
What are the two main parts that make up the CNS?
The encephalon and the spinal cord.
100
What are two types of muscles?
Involuntary muscles and voluntary muscles.
200
What is the part of the neuron which receives the nerve impulse?
The dendrites
200
How many types of spinal nerves are there?
4: Cervical nerves, thoracic nerves, lumbar nerves and sacral nerves.
200
What makes up the encephalon?
The brain, the cerebellum, and the brain stem.
200
How many hemispheres make up the brain?
Two.
200
Where are reflexes triggered if they are not triggered by the encephalon?
The spinal cord
300
What is the zone where the nerve impulse travels from neuron to neuron?
The synapse
300
What are the three types of nerves?
Sensory nerves, motor nerves and mixed nerves.
300
What are the two main functions of the cerebellum?
It coordinates movement and balance.
300
What are the three things that the brain stem regulates?
Respiratory rhythm, heart rate and blood pressure.
300
What is a voluntary action?
It is a conscious gesture.
400
What are the three types of neurons?
Sensory neurons, motor neurons and association neurons
400
What are the cranial nerves connected to?
The encephalon.
400
How many pairs of spinal nerves are there?
Thirty-one.
400
What type of neurons are mainly found in the back of the spinal cord?
Sensory neurons.
400
What is a reflex arc?
It is a neural pathway.
500
What are the three main properties of a neuron?
They are excitable, they are conductive and they are specialized.
500
What is the part of the neuron which the nerves contain?
The axon
500
What is the liquid cushion that protects the encephalon?
The cerebrospinal fluid.
500
What are the three membrane layers that protect the encephalon?
The meninges.
500
What is the pathway beginning from a sensory organ to the brain?
Sensory organ --> sensory nerve --> spinal cord --> brain stem --> brain