Nervous System
Name the 3 functions of the nervous system
What is Sensation, Integration, Motor output
these provides support and protection of neurons, they are smaller than neurons and more numerous
What is Neuroglia
Found at the end of the axon
Axon terminals / synaptic end bulbs
These cover the brain and spinal cord for protection
meninges
What are programmed responses called?
Reflexes
2 subdivisions of the PNS
Autonomic and somatic
what does CNS stand for?
Central Nervous System
The peripheral nervous system is divided into two divisions, what are they?
Afferent (sensory) and Efferent (motor)
How many pairs of spinal nerves are there?
31
Special chemicals that transmit info from one neuron to another is called what?
neurotransmitters
Two subdivisions of the Autonomic Nervous System
What is Parasympathetic Division- "rest and digest" and Sympathetic "Fight of Flight"
three parts of a neuron
1- cell body (soma) 2- dendrites 3- axon 4- myelin sheaths 5- axon terminals 6- nodes of ranvier
What are the 4 main lobes?
1. Frontal
2. Parietal
3. Temporal
4. Occipital
Also known as the "touch" receptor.
mechanoreceptors
The largest part of the brain.
cerebrum
The central nervous system is made of these organs
brain and spinal cord
what does an axon terminal hold?
neurotransmitters
One word description for midbrain
mesencephalon
Responsible for temperature variations
Thermoreceptors
list the three different types of neurons
afferent, efferent, interneurons
An action potential travels along this
A neuron's axon
What part of the brain relays sensory impulses?
Thalamus
what is the gap btw myelin sheaths on the axon called?
nodes of ranvier
What is the most important cell in the nervous system called?
what does PNS stand for?
peripheral nervous system