Nervous system

(cerebrospinal fluid “CSF”). CSF circulates inside the central nervous system through the ventricular part of this system and is finally absorbed into the bloodstream. Thus, the central nervous system literally floats in a cushion of CSF.1 CSF function CSF is going under continuous circulation and as a result the central nervous system literally floats in a cushion of CSF. This cushion protects the two major areas of the central nervous system…

Ocean County College BIOL-131-DL1 The endocrine system and ANS work together in times of stress to maintain homeostasis. The autonomic nervous system (ANS) is divided into two subdivisions the sympathetic, and parasympathetic. They sympathetic nervous system activates the “fight or flight” response which causes a rise in heart rate, pupil dilation, increased sweating, and blood pressure. The parasympathetic nervous system activates the “rest and digest” or “feed and breed”…

Rabies (from the Latin word “madness”) has been recognized for over four thousand years. The first record of rabies dates back to 2300 B.C. in the Babylonian city of Eshnunna when dog owners were forced to pay a fine for causing the deaths of other people. Since then, many notable writers and philosophers such as Homer, Democritus, and Aristotle have also recorded rabies, mostly through cases of canine rabies (or rabies received through a rabid dog). During the 16th century, Girolamo Fracastoro,…

(highlighted in the handout): Stimulus, neurons, dendrites, neurotransmitters, axon, myelin, action potential, graded potential, transmembrane potential, neuroglia, cerebrum, spinal cord What is the central nervous system? It’s a system which consists of the nerves in the brain and spinal cord. This system only makes up about 3% of a human’s body weight but serves a vital function, gathering information about and reacting to its environment and any stimulus. Don’t Shoot the Messenger Much of…

Another situation where the central nervous system provides a feedback loop is when there is a high concentration of carbon dioxide in the bloodstream. This event was simulated during the re-breathing exercise. Unlike hyperventilation, where the subject had a long breath-hold and a small carbon dioxide composition, re-breathing had the shortest duration and the highest percent of carbon dioxide. The test subject was able to hold her breath for only 27 seconds. Meanwhile, her CO2% increased from…

without specifically causing a depolarization or hyperpolarization. They are found in the central nervous system, and they affect certain groups of neurons or effector cells that have the appropriate receptors. However, neuromodulators can be used to treat epilepsy, other pain syndromes and even certain movement disorders. Examples of neuromodulators are as follows; a. Noradrenaline (Noradrenaline system). According to Khetrapal (Hons), noradrenaline acts as a quick modulation of circuits and…

biological system that may function to optimize social connections is parasympathetic activity, often conceptualized as the functioning of the vagus nerve and measured as respiratory sinus arrhythmia (RSA) or high-frequency heart rate variability (HF-HRV) at rest. The longest autonomic nerve in the human body, the vagus contributes to the innervation of the viscera, including the heart. Measures of cardiac vagal function like RSA have been used as a proxy for the parasympathetic nervous system’s…

or even imagined. Daily life no longer becomes the simple task of getting dressed and going to work, but voluntarily caring for your own body, with the hopes living a long and fulfilling life. Multiple sclerosis is a disease of the central nervous system, which causes inflammation and hardening of tissues located within the brain and brain…

of the nervous system. Reading through the section of what brains are like, it was interesting the difference between the Central nervous system and the Peripheral nervous system. The Central nervous system only consists of the brain and the spinal cord, but the Peripheral nervous system consists of motor and sensory neurons that connect the brain and the spinal cord to the rest of the body such as sensory organs, muscles, and body organs. Although all vertebrates possess a Central nervous…

on the brain, acting on neurons and various neurochemicals. It can modify cell membranes, along with their ion channels, enzymes and receptors. Alcohols’ effect on the central nervous system (CNS) is largely due to its action on different neurotransmitters. A major inhibitory neurotransmitter in the central nervous system is gamma-aminobutyric acid (GABA). Alcohol amplifies the effect of GABA by binding to and stimulating GABA receptors, causing the opening of ion channels. This allows for an…