Nervous System and all the divisons

Nervous System, all divisions, and how reflexes work.

The nervous system spilts into the Peripheral nervous system which is more complicated than the Central Nervous System. Look at the picture to get a visual understanding of what each division is!

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The divisons of the Nervous System

Multiple Choice

What does the autonomic nervous system control

• all un voluntary movements

• all voluntary movements

In this photo you can see the difference between the central nervous system and peripheral nervous system, and where they are in your body.

​The 2 divisons

What are the divisons of the Peripheral nervous system?

​	Autonomic	​Somatic	​Sympathetic	​Parasympathetic
​	​The autonomic nervous system is the body's automatic system. It regulates involuntary physiologic processes including heart rate, blood pressure, and respiration. Think of it like automatic, you don't have to think about it for it to happen.	​The somatic nervous system is the body's voluntary movements. For example, you picking up a glass of water to drink. You have to think about it for it to happen, opposite of autonomic.	​The sympathetic nervous system is divided from the autonomic system. This arouses your body in a time of stress, known as the "Fight or Flight" response.	​The parasympathetic system is divided from the autonomic nervous system. This calms you down after an event of stress. Known as the "Rest and Digest" response.

The central nervous system is way less complex than the peripheral. It consists of the brain and spinal cord. The central nervous system's responsibilities include receiving, processing, and responding to sensory information.

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What is the central nervous system?

First off, what is the Nervous system?

The nervous system consists of the brain, spinal cord, and nerves. The Nervous system sends messages back and forth between the brain and the body. The nervous system consists of many divisions, see them on the next slide.

Multiple Choice

What is the function of the Nervous System? Be specific.

• The master controlling and communicating system of the body

• The master movement system

• It helps us be able to breathe

• It helps u be able to eat, sleep, and talk.

Multiple Choice

What does the Peripheral Nervous System Consist of? Be specific.

• Autonomic and central nervous system

• Somatic nervous system and Autonomic nervous system. The sympathetic and parasympathetic system.

• The automatic system and non-automatic system.

​The neurons in the Nervous system


There are 3 types of neurons in the Nervous System. The sensory neurons, the interneurons, and the motor neurons. The sensory neurons transmit information to enable our senses, like feeling hot water. The interneurons are like the messengers between the sensory and motor neurons, kinda of like a gossiper. Lastly, the motor neurons transmit information to our muscles so we can move.

Multiple Choice

What neuron transmits impulses from the spinal cord to the muscles for movements?

• motor neurons

• sensory neurons

• neurons

• interneurons

​A sensory neuron is Afferent, which means it brings information to the brain. Think of ARRIVING to the brain.

Sensory Neuron

​A motor neuron is Efferent, which means it goes away from the brain. Think of EXITING the brain.

​​Motor Neuron

​A better way to remember..

Fill in the Blank

Is a motor neuron efferent or afferent?

Multiple Choice

What neuron is like a messenger between the motor and sensory neurons

• interneuron

• motor neuron

• sensory neuron

​Reflexes are automatic responses or actions that your body does in response to something without thinking about it.  For example when you go to the doctors office and they hit your knee with a hammer, your leg kicks, and you have no control in that action.

​Reflexes

Why are reflexes necessary?

​Reflexes are instincts that protect your body from harm. For example, if something is about to hit you in the head your first instinct(your reflex) is to duck so you don't get hit. Your reflexes are kinda like superheroes!

Here are some ways to remember what we just went over!

• PARAsympathtetic- PARAchute slows you down 

• Sympathetic = FIGHT OR FLIGHT

• Parasympathetic = REST & DIGEST

• Autonomic Nervous System: involuntary bodily functions. Autonomic/Automatic

Fun Fact: The nervous system can transmit signals at speeds of 328 feet (100 meters) per second, more than 8 times faster than the top speed of Usain Bolt.

We hope you have a great understanding of all the nervous system divisions, and how reflexes work!