Senses What are the human senses and how do they work? The human senses are faculties by which the human body perceives external stimulation. Humans have senses to help them experience the world around them. The five main senses are sight‚ hearing‚ taste‚ smell and touch. Each of these five senses consists of organs with a specialized structure that has receptors for specific stimulation. These receptors are linked to the nervous system and therefore the brain. Sight Sight is the sense
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body will be discussed. 1. Cobratoxin Cobratoxin (CTX) is a neurotoxin made up of polypeptides and proteins produced from the salivary gland of the cobra. Cobratoxin acts by targeting nicotinic acetylcholine receptor (NAchR) in the muscle tissue and nerve‚ blocking the binding of Acetylcholine
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commonly used in literature when describing the neurological disease that is MS. MS is a disease of the central nervous system caused by a degeneration of the myelin sheath that insulates the nerves who’s function are to carry nerve impulses around the body. This inevitably results in dysfunction of neurological impulses and therefore neurological symptoms. (Goodman & Samkoff 2014) It is described as being an immune mediated disease with both genetic and environmental factors influencing its development
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along nerves. These signals prompt the changes in function that adjust the deviation and bring the internal environment back to the stable state. Next in the negative feedback loop is the effectors which are muscles‚ organs‚ or other structures that receive signals from the brain or control centre. When an effector receives a signal from the brain‚ it changes its function in order to correct the deviation (Science.jrank.org‚ 2008). To highlight‚ the nervous system uses sensory receptors‚ nerves‚ and
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Homeostasis The conditions inside our body must be very carefully controlled if the body is to function effectively. Homeostasis is the maintenance of a constant internal environment. The nervous system and hormones are responsible for this. One example of homeostasis is the concentration of carbon dioxide in the blood being carefully controlled. Here are some of the other internal conditions that are regulated: Body temperature This is controlled to maintain the temperature at which the
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helps the body communicate external environmental factors via electrical impulses that are transmitted through cells called neurons. These neurons can be up to a meter long and target a specific effector which it will help
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System: Pathways • Afferent Nerves • Also called sensory nerves‚ they carry information about the environment to brain and spinal cord • Efferent Nerves • Also called motor nerves‚ they carry information from the brain and spinal cord to the rest of the body • Neural Networks • Networks of cells that integrate sensory input and motor output Nervous System: Primary Divisions • Central Nervous System (CNS) • Brain and spinal Cord • Peripheral Nervous System (PNS) • Network of nerves connecting CNS to body
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draws more fluid in whereas a decrease in electrolytes promotes an efflux of fluids. Sustaining this type of osmotic gradient is essential for nerve and muscle function‚ hydration‚ and maintaining blood pH levels. Additionally‚ electrolytes carry electrical impulses across the cell and to neighbouring cells in order to promote muscle contractions and nerve impulses. 1. The pH of the tissues and the entire body fluids affects the condition of your health. The closer the pH is always to 7.35 - 7.45‚ the
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CHAPTER 1 Interest in the human body and how it functions probably developed when our ancestors began to think about the reasons why people became ill and died. All earlier cultures had someone designated as a healer who was responsible for finding plants and herbs that cured body disorders. This healer also was responsible for praying or invoking the assistance of past ancestors to help in the healing process. As cultures developed and science began to evolve‚ interest in and knowledge about
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messages into proteins and enzymes. It is the function of RNA polymerase‚ to copy the genetic message to messenger RNA as well as synthesize transfer RNA and ribosomal RNA. The article further expounded that the protein called A2Bp1 produced in nerve cells helps cut and stitch pieces of RNA together to create mRNA molecules that guide production of proteins. In autistic brains 200 plus distinct RNA molecules were stitched together incorrectly. Each of the 200 plus RNA molecules had the potential
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