Nervous system course notes

Nervous system course notes

The nerve cell body contains the nucleus, rough ER Nissl bodies , and cytoplasm. Visceral arterioles have almost only sympathetic input. Causes muscles to contract it constricts the pupil. You may cancel anytime under Payment Settings. More from OC The iris sphincter muscle has only parasympathetic inputs. The blood-brain barrier protects the cerebrospinal fluid by blocking many drugs and toxins. Blood glucose increases after eating Pancreas releases insulin into the blood Insulin reaches the liver Liver changes glucose in the blood to glycogen and stores it Blood glucose level decreases back to normal Blood glucose decreases after fasting Pancreas releases glucagon into the blood Glucagon reaches the liver Liver changes stored glycogen into glucose Blood glucose level increases back to normal 8 Diabetes Diabetes results either from the body producing no insulin or too little insulin type 1 diabetes or from body cells not responding to insulin type 2 diabetes. This barrier is a membrane that lets some substances from the blood into the brain but keeps out others. Even relatively minor damage to the spinal cord can cause loss of feeling in parts of the body, impaired organ function, and loss of muscular control. It is responsible for receiving and processing information in the body and is divided into two main branches: the central nervous system and the peripheral nervous system. The endocrine glands release their hormones directly into the blood as it flows through the gland. Explain both the anatomical and functional divisions of the nervous system.

Type 1 diabetes is treated by insulin injections while type 2 may be treated by lifestyle changes, e. Explain both the anatomical and functional divisions of the nervous system.

The endocrine glands release their hormones directly into the blood as it flows through the gland. The CNS determines stimulus intensity by the frequency of impulse transmissions.

Axons and Dendrites are both arm-like extensions from the cell body. How do they structurally and functionally differ? Though spinal cord injuries are usually permanent, current research into regenerated axons and stem cells offers hope that one day these injuries may be treated successfully.

It runs from the brain down to the small of the back and is responsible for spinal reflexes, which are automatic behaviors that require no input from the brain. Injuries to the spinal cord can cause serious problems, such as paralysis.

Nervous system notes powerpoint

Causes muscles to contract it constricts the pupil. Blood glucose increases after eating Pancreas releases insulin into the blood Insulin reaches the liver Liver changes glucose in the blood to glycogen and stores it Blood glucose level decreases back to normal Blood glucose decreases after fasting Pancreas releases glucagon into the blood Glucagon reaches the liver Liver changes stored glycogen into glucose Blood glucose level increases back to normal 8 Diabetes Diabetes results either from the body producing no insulin or too little insulin type 1 diabetes or from body cells not responding to insulin type 2 diabetes. Dendrites are short and extremely branched processes that function as the input regions of neurons. Once a stimuli has reached a certain threshold the neuron will fire, this is achieved through either graded potential signals or action potential signals. The blood-brain barrier protects the cerebrospinal fluid by blocking many drugs and toxins. The most important part of ans is for homeostatic regulation. We will write a custom sample essay on Nervous System: Course Notes Order now It is the major biosynthetic center and the main body for the outgrowth of neuronal processes. Though spinal cord injuries are usually permanent, current research into regenerated axons and stem cells offers hope that one day these injuries may be treated successfully. End of first neurone Start of second neurone Synapse This causes release of a chemical that diffuses across the synapse And triggers a nerve impulse in the second neurone 7 Hormones As well as the nervous system, parts of the body can communicate through hormones. How do they structurally and functionally differ? The brain and the spinal cord make up the central nervous system. A stimulus is detected by a receptor, e. Myelin sheath is a fatty covering around long axons that protect it and help increase the speed of nerve impulse transmission.

Unlock to view full version Unlock Document Premium access to all notes and study guides. Sympathetic input speeds up heart rate tachycardia and increase the force of contractions i.

Myelin sheath is a fatty covering around long axons that protect it and help increase the speed of nerve impulse transmission.

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Central Nervous System