Nervos And Sensory Flashcards
(118 cards)
What is the nervous system?
controls, directs and coordinates body function
Two main divisions of Nervous System
CNS : the central nervous system_ brain & spinal cord
PNS : the peripheral nervous system_ nervous of rest body
2 type cell of NERVE tissue
Neuroglía- nourishes(provide necessary substance)/
protects
insulates (cover) neurons
neurons_ transmit information
Neurons work
Dendrites- receive messages
Nucleus- keeps cell alive
Axon- sends messages to axon terminals.
Myelin sheath- cover exon:enable to deliver impulse faster!
Neurotransmitters - chemical - allow message
Synapse- space between neurons
Is the neuron damaged easily?
Yes
How long take times to heal?
Long time
CNS covered by which bone & tissue?
Skull & meninges
Three main parts of CNS
1- cerebrum: largest part/ outer layer( cerebral cortex)
* thinking cap *
2-cerebellum: body movements
3- brainstem: control vital functioning in medulla
What is in the spinal column?
Spinal cord
What is the spinal cord contains?
The pathway that conduct message to & from brain
How long spinal cord?
18 inch
Dose the spinal cord extend?
Not extend
What is the meninges?
It is three layers connective tissue (covers & protects CNS)
Three layers of meninges
1- dura mater- out layer & next to the skull
2-arachnoid- middle layer
3-pie mater- inner layer
It the dura mater is damaged, which problem occurs?
Headache & memory issue because it is closed to the skull
What is the name of fluid to cushion the fragile tissue of CNS?
CSF: cerebral spinal fluid
It flows in the space
How many pairs of nervous system in PNS?
12 pair of cranial nerves & 31 pairs of spinal nerves
Which responsibility each of cranial & spinal?
1 crinal nerves - conduct impulses
* between brain and head-neck-chest- abdomen
2 spinal nerves - carry impulse
*from the skin-extremities-internal structure
; rest of cranial nerves parts
Is the Nervous system autonomic?
Yes.it controls involuntary muscles & body function automatically
Two part of control automatically
- Sympathetic- speed up
- Parasympathetic-slow down
If the brain is being symphatetic, what will happen in our body?
Metabolism
Heart rate Goes high
Blood pressure
Digestion
If the nervous system maintain parasympathetic controls?
Metabolism
Heart rate normal state/relaxed
Blood pressure
Digestion
What is the important between sympathetic & parasympathetic?
Balance
What is the 5 sensory in body?
Sight
Hearing
Taste
Smell
Touch