Nervous+System

Jake

Nervous System


 * Homeostasis**

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 * Homeostasis** is simply the combination of two words: homeo mean body and stasis mean balance. This state is really important because if your body internal condition were not kept in balance than enzymes and chemical in your body couldn’t function probably**.** The nervous system is the control center of the body and it communicates by electrical-chemical wiring network. Homeostatic respond to changes in internal and external condition by it regulatory and coordinating system.

**The [|Nervous System]** Central Nervous System (CNS): 
 * [[image:http://lh6.ggpht.com/_hZbj5ir5MvY/TSsE8q-065I/AAAAAAAABNs/eplC9RXNON0/nervous%20system.jpg width="272" height="224"]]


 * **Brain**: contain 100billion neutrons( nerve cells) and trillion of glia (support cells)

**Peripheral Nervous System (PNS)**: gather information.
 * **Spinal Cord**: it go from the brain to the middle of the back and is protected and surrounded by bony vertebral column

PNS and CNS works together in our body to help it function. PNS transmit message to CNS and to other organs in the body through CNS. The message will be store for the future use in CNS
 * **Somatic Nervous System ****(Voluntary)**: consist of peripheral nerve fiber which send the information from sensory to CNS and motor nerve fibers which protect skeletal muscle
 * **Autonomic Nervous System (Involuntary)**
 * **Sympathetic **
 * Stress activated it
 * Heart rate, breathing rate, pupil size, sweating will be increase
 * **Parasympathetic **
 * Maintains body functions when relaxed.
 * Restores body to pre-stress state
 * Motor neurons and Sensory neurons belong to PNS


 * Stimulus/Stimuli**


 * A stimulus ** is changes in the surrounding other word is internal or external environment. Plural is stimuli. Examples of stimuli include sense like sound, sight, smell …..




 * [| Neurons]:**


 * Nerve cells** transmit messages to and from CNS. It also stored information.

** · Neuron has three part: Cell Body, Dendrites, Axon** ** · **The dendrites **tree receive signals, it pick up impulse and shuttled through axon then transmitted to the other neurons.** ** · **Chemical synapses **allow one neuron to stimulate another. Chemical synapses are specialized junctions through which nervous system cell signal to one another and to non-neuronal cells such as muscles or gland ( definition get from sciencedialy.com )** ** · **An action potential **is when it moves the electrical signal. It will move in the neuron down to the axon.**



Vocabulary
 * __28.2__**
 * Homeostasis: Homeostasis is simply the combination of two words: homeo mean body and stasis mean balance**
 * Feedback: Feedback is information from sensors that allow a control center to compare current conditions to set the best conditions**
 * Negative feedback: control system sends instructions to a target to counteract (to take action against something) changes**
 * Positive feedback: control system sends instructions to make body back to its normal conditions**


 * __29.1__**
 * Stimulus: A stimulus is changes in the surrounding other word is internal or external environment  **
 * Nervous system: is a body control center where it controls thought, movement, and everything you do or act**
 * Central nervous system (CNS): consist of the brain and spinal cord. Interpret the information and decide to respond**
 * Peripheral nervous system (PNS): is to gather information. Example: you get information around you by PNS**
 * Endocrine system: the bodily system that function to regulate body activities. It helps to control growth, development.**


 * __29.2__**
 * Neuron: Nerve cells transmit messages to and from CNS. It also stored information.**
 * Dendrite: branchlike of the cytoplasm that receive message**
 * Axon: long Branch that carries electrical message**
 * Action potential: when a neuron is stimulated, it produces a moving electrical impulse called action potentials**
 * Neurotransmitter: the nervous system's chemical signals that connect to the next neuron, stimulating it to open its Na+ channel**
 * Synapse: A tiny gap between the neurons**

For online study and more information please click the link below: []

Answer question:

Homeostasis is simply the combination of two words: homeo mean body and stasis mean balance. This state is really important because if your body internal condition were not kept in balance than enzymes and chemical in your body couldn’t function probably.
 * What is homeostasis?**

The nervous system is the control center of the body and it communicates by electrical-chemical wiring network. Homeostatic respond to changes in internal and external condition by it regulatory and coordinating system. **How are the two parts of the nervous system different?** Central Nervous System (CNS): interpret and respond Peripheral Nervous System (PNS): gather information
 * How does the nervous system help the body maintain homeostasis?**
 * Brain: contain 100billion neutrons( nerve cells) and trillion of glia (support cells)
 * Spinal Cord: it go from the brain to the middle of the back and is protected and surrounded by bony vertebral column
 * Somatic Nervous System (Voluntary): consist of peripheral nerve fiber which send the information from sensory to CNS and motor nerve fibers which protect skeletal muscle
 * <span style="font-family: 'Times New Roman',serif; font-size: 12pt;">Autonomic Nervous System (Involuntary)
 * <span style="font-family: 'Times New Roman',serif; font-size: 12pt; line-height: normal;">Sympathetic
 * Stress activated it
 * Heart rate, breathing rate, pupil size, sweating will be increase
 * <span style="font-family: 'Times New Roman',serif; font-size: 12pt; line-height: normal;">Parasympathetic
 * Maintains body functions when relaxed.
 * Restores body to pre-stress state

Central nervous System (CNS) Peripheral Nervous System (PNS) Autonomic Nervous System (ANS)
 * What are the major structures of the nervous system?**

A stimulus is changes in the surrounding other word is internal or external environment. Plural is stimuli. Examples of stimuli include sense like sound, sight, smell ….. <span style="background: white; margin-bottom: 18.0pt; margin-left: 0cm; margin-right: 0cm; margin-top: 18.0pt;">** What are neurons **** ? ** <span style="background-attachment: initial; background-clip: initial; background-color: white; background-image: initial; background-origin: initial; background-position: initial initial; background-repeat: initial initial; font-size: 11pt; margin-bottom: 18pt; margin-left: 0cm; margin-right: 0cm; margin-top: 18pt;"> Nerve cells, transmit messages to and from CNS <span style="background: white; margin-bottom: 18.0pt; margin-left: 0cm; margin-right: 0cm; margin-top: 18.0pt;">Neuron has three part: Cell Body, Dendrites, Axon
 * What is a stimulus?**

The dendrites tree Peripheral Nevous System (PNS) [|l]  The dendrites The dendrites pick up impulse and shuttled through axon then transmitted to the other neuron.
 * What part of the neuron receives signals?**
 * To what part of the nervous system do motor neurons and sensory neurons belong?**

Chemical synapses Chemical synapses are specialized junctions through which nervous system cell signal to one another and to non-neuronal cells such as muscles or gland ( definition get from sciencedialy.com )
 * What are the chemical signals that allow one neuron to stimulate another?**

An action potential is when it moves the electrical signal. It will move in the neuron down to the axon.
 * When and where is an impulse an electrical signal?**

PNS transmit message to CNS and to other organs in the body through CNS. The message will be store for the future use in CNS. (Nowicki,875) · The signal is not travel to the spinal cord and then to the brain. · You will have a quick react (Nowicki,889) <span style="font-family: 'Times New Roman',serif; font-size: 12pt; line-height: 115%;">Somatic Nervous System: it’s voluntary, send information from sensory to CNS and protect the skeleton muscle. <span style="font-family: 'Times New Roman',serif; font-size: 12pt; line-height: 115%;">Autonomic Nervous System: it’s involuntary, and it activated by stress
 * From sensing a stimulus to producing a response, how do your CNS and PNS work together?**
 * How is a ?**
 * What is the difference between the two parts of the PNS?**