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Presentation Details: Slides: 8 Duration: 00:06:01 Filename: C:\Users\jpage\Documents\NCVPS Learning Objects\Psychology Nervous System and Endocrine System Navigation to PPT W\psychology - nervous system and endocrine system\Nervous System and Endocrine System.pptx Presenter Details: NERVOUS SYSTEM AND ENDOCRINE SYSTEM Published by Articulate® Presenter www.articulate.com Slide 1 Notes: Nervous System and Endocrine System Duration: 00:00:06 Advance mode: Auto Nervous Systems and Endocrine System NERVOUS SYSTEM AND ENDOCRINE SYSTEM Slide 2 Notes: Neuron Duration: 00:00:47 Advance mode: Auto Dendrite NEURON Soma Axon covered in myelin sheath Images from www.FreeDigitalPhotos.net Slide 3 Synapse SYNAPSE Duration: 00:00:32 Advance mode: Auto Neurons are the building blocks of the nervous system. Neurons receive and transmit information to other cells. Dendrites are the finely branched fibers that accept most incoming messages. Think of them as the receivers. The soma receives two types of message: excitatory (think excited!!!) and inhibitory (think inhibit). They pass the information to the cell body or soma. If the soma decides to pass along the information then it will initiate a message and send it along a single transmitter known as the axon. The myelin sheath covers the axon. Notes: The message has to pass along to other neurons (nerve cells). The best analogy to explain this transfer of a message to other neurons is to imagine a row of dominoes falling. When you stack dominoes in a line they don’t touch; there is a gap. Neurons don’t touch each other either! This gap is called a synapse. The synapse serves as the communication link between the two neurons. The chemical message is called the neurotransmitter Images from www.FreeDigitalPhotos.net Published by Articulate® Presenter www.articulate.com Slide 4 Central Nervous System Duration: 00:00:46 Advance mode: Auto Slide 5 Peripheral Nervous System Duration: 00:00:15 Advance mode: Auto Published by Articulate® Presenter CENTRAL NERVOUS SYSTEM Notes: The Nervous System is the entire network of neurons in the body. The nervous system is divided into two major divisions: The Central Nervous System and the Peripheral Nervous System. The Central Nervous System (CNS) is comprised of the brain and the spinal cord. It serves as the command central for all messages. The spinal cord is the means for the messages to travel to the brain but it also is responsible for simple reflexes. Relexes happen automatically without brain power. People with spinal cord injuries are able to react to painful stimulus even if they don't feel the pain! We will discuss the brain in further detail in the next lesson Notes: Peripheral Nervous System connects the CNS to the rest of the body. The peripheral nervous system is further divided into two divisions: Autonomic nervous system and the Somatic Nervous System. www.articulate.com Slide 6 Somatic Nervous System uses your Senses Notes: Somatic Nervous System Duration: 00:00:39 Advance mode: Auto These cookies taste great! Image from licensed Microsoft word Slide 7 Notes: Automatic Nervous System Duration: 00:01:04 Advance mode: Auto Image from licensed Microsoft word Published by Articulate® Presenter The Somatic Nervous System takes in information from outside of your body and carries it to be processed in the brain. It uses your sense organs and voluntary muscles. For example, you see and smell fresh baked chocolate chip cookies. The sensory input is carried to the brain through the afferent system. The scent and visual messages are sent to the brain for processing. Your motor or efferent nervous system sends the message to your hand to pick up the cookie and bring it to your mouth. It also tells your mouth to open, take a bite, chew, and swallow. The Autonomic Nervous System communicates with internal organs and glands. So once you swallowed that bite of cookie, the autonomic nervous system begins its process. ANS handles internal jobs like digestion, respiratory, heart rate, and arousal. These processes occur without you thinking about it. The ANS is further divided into two divisions: Sympathetic division and Parasympathetic division. Sympathetic division arouses the internal organs during a stressful situation. Often referred to as the "fight-or-flight" system. This system helps us respond quickly to a stressful situation. Some symptoms such as increase heart rate, difficult to breathe, or even your palms starting to sweat. Parasympathetic division's job is to calm your organs. Basically, it reverses the symptoms the sympathetic division aroused. The two systems work together. www.articulate.com Slide 8 Endocrine System Duration: 00:01:53 Advance mode: Auto ENDOCRINE SYSTEM Notes: • • • • Published by Articulate® Presenter The Endocrine System The Endocrine System is comprised of endocrine glands:pituitary, thyroid, parathyriod, adrenals, pancreas, ovaries, and testes. Each of the glands secrete a specific type of hormone that influences body functions, behavior and emotions. Located in the brain, the pituitary gland or "head" gland regulates the other glands. The glands produce chemical messages called hormones. Hormones are similar to neurotransmitters but they travel through the bloodstream. The hormones once secreted into the bloodstream travel throughout the body until they reach their target, which could include not only other endocrine glands but also muscles and organs. The pituitary gland or master gland oversees all the endocrine responses. However, the pituitary gland takes orders from the hypothalamus. We will take a closer look at the hypothalamus in the next lesson. The endocrine system and the peripheral nervous system work side by side to send messages to the brain. It is the brain's duty to decide which messages will be sent through to both systems. Under normal circumstances, the endocrine system, along with the parasymparathetic system,work to sustain our basic body processes. However, when faced with a crisis, the endocrine system works along with the sympathetic system. The hormone epinephrine or adrenalin is released into the bloodstream during an emergency or stressful situation. The endocrine systems helps sustain the "fight or flight" situation. www.articulate.com Published by Articulate® Presenter www.articulate.com