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Nervous System Ricardo Hernandez Per.2 - Coggle Diagram
Nervous System
Ricardo Hernandez
Per.2
Tissues of the Nervous System
Neuron
It is just a basic cell unit of the nervous system
Axons
It is the cell body of the neurons which you have 100 billions of them.
Nerves
After the axons are bundle in they are later turned into nerves and they are surrounded all over your body
Dendrites
Dendrites can help communicate with neurons so they build more of neurons and can bundle them up to make more nerves
Neuroglia
They are cells that help support the neurons and also can protect nerves
Microglia
They are small cells that can be function that can produce tissues whenever the neuroglia is damaged
Oligodendrocytes
They can surround the axons to the brain and spinal cord to form a myelin sheath
Ependymal cells
They can produce a cerrbrospinal fluid in the CNS. This fluid can help can be used as protection to the brain from any harm to it.
Major and Sub Divisions of the Nervous System
CNS
CNS stands for Central Nervous System and it is the main portion of the brain that can control most of the functions of the brain and consist of the brain and spinal cord.
Spinal Cord
The spinal cord can send messages through the brain so your body can tell what to do and such.
Brain
The Brain commands the center of your body and can control every part of your body.
PNS
PNS stands for Peripheral nervous system and it is mostly the system that can help spread nerves all around to the brain and spinal cord making it all around your body.
Spinal Nerves
They are mixed nerves in pairs and there are 31 pairs of them in vertebrae and they can send automatic signals to your body giving you a reflex or reflexes.
Connective Tissue Covering
Epineurium
This is the outer covering of nerves and can protect the nerves from stretching and also can endure injury
Perineurium
This covers the the nerve fibers of the axons and can also maintain homeostasis for the Endoneurium
Endoneurium
This covers around the fascicles of the nerve fibers and also maintains fluid pressure to your nerves
Classification of Neurons
Sensory Function
The Sensory function can sense from the outside of your body and is responsible to send messages to the brain so it can respond to it.
Integrative Function
The Integrative functions helps coordinate the ways we do such as talking to people, or our emotions on what do we think on this situation that occur in our lives.
Motor Function
The Motor Function are nerve impulses that can help coordinate the brain and what can we do in a situations this is also called a motor behavior
Reflex Arc (major parts and functions)
Receptors
This can sense any specif types of internal or external change
Sensory Neuron
This helps carries info for the brain and spinal cord making it respond to it
Interneuron
This helps carries info from the sensory neuron to the motor neuron and helps respond to it.
Motor Neuron
This helps carries instructions from the brain or spinal cord out to the effector making a better help to respond and how can it be put in perspective.
Effector
The Effectors can help respond to the stimulation from the motor neuron or the sensory neuron and can make your body a reflex or reflexes.
Action Potential and Nerve Impulses
Threshold Stimulus
It is a strong stimulus that can cause a lot of NA+ neurons to enter the body of the neurons and changing it to a threshold potential
Na + channels
They are ions that are flown through the cells of the neurons and making them into a negative cells because of the gradient of the concentration
Action Potential
Once the threshold potential is activated, then the ions from the cell are charged making it into an action potential and make the cells into a negative to a positive
Impulses of Neurons
When the action potential is triggered their are impulses that goes into the nerve making it electrical current and their are different types of nerve impulses of conduction
Salatory Conduction
This function can insulates axon by the myelin sheath from the ions cells and through the cell membrane and it occurs when the axon are myelinated
Continuous Conduction
This is conducted when they are impulsed over a length of time and also can occur when the axons are uncontaminated
Neurotransmitter
The Neurotransmitter can be created by the synapse, the synapse can be turn into a communicator by the 2 things that it has presynaptic neuron and the postsynaptic neuron
Postsynaptic Neuron
This is responsible to received impulses from the neurons like a messenger receiver
Presynaptic Neuron
This is responsible to send impulses from the neurons like a messenger
Cranial and Spinal Nerves
There are 31 pairs of the spinal nerves. 8 Cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal
Cranial Nerves are connected to the brain and also the brain stem.
The Cranial Nerves can send in sensory information to the all 5 sense of your perspective such as smell, vision, touch, hearing, and taste.
The Spinal nerves are connected to the spinal cord and can control it.
The spinal nerves can help communicate with the brain and to help command it on what to do.