factors and conditions are detected by the body’s nervous system. These changes are detected‚ interpreted and responded to. By sending electrical and chemical impulses the nervous system sets in place reactions to counteract these conditions. An example of this is if you where to place your foot on a sharp object‚ pain is detected by nerves or receptors in your foot and send a message through your foot‚ leg and into your spinal cord and into the brain which forms part of your central nervous system
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Tak 1.1 List all the systems of the human body with their functions and major organs. The circulatory system is the body’s transport system. It is made up of a group of organs that transport blood throughout the body. The heart pumps the blood and the arteries and veins transport it. Oxygen-rich blood leaves the left side of the heart and enters the biggest artery‚ called the aorta. The aorta branches into smaller arteries‚ which then branch into even smaller vessels that travel all over the
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Exercise 3: Neurophysiology of Nerve Impulses: Activity 1: The Resting Membrane Potential Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. What is the approximate concentration of K+ inside a typical cell (intracellular concentration)? You correctly answered: a. 150 mM 2. What is the approximate concentration of K+ outside a cell (extracellular concentration)? You correctly answered: b. 5 mM 3. What is the approximate concentration of Na+ inside
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external structure of the eyeball. The external layer of the eyeball is formed by the cornea‚ and the sclera. The cornea is a dome-shaped structure. The cornea does not have any blood vessels that is why it appears clear. The cornea does have nerves. The cornea is the first and most powerful lens in the eye’s optical system. The cornea is the first part of the eye to focus. When a ray of light hits the eye‚ the cornea is the first structure the light encounters. Then the light rays travel
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1. Introduction: Modifying the human body or enhancing our cognitive abilities using technology has been a long-time dream for many people. An increasing amount of research tries to link the human brain with machines allowing humans to control their environment through their thoughts. Research on BCIs began in the 1970s‚ but it wasn’t until the mid-1990s that the first working experimental implants in humans appeared. Following years of animal experimentation‚ early working implants in humans now
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Multiple Sclerosis‚ also known as MS‚ is a disease causing demylination of the white matter in the spinal cord and brain. The nerve damage slows‚ blocks or distorts transmission of nerve impulses. MS is characterized by periods of exacerbation and remissions. The crippling disease is a major cause of chronic disability in young adults. It usually becomes symptomatic between the ages of twenty and forty with twenty-seven being the average. Prognosis varies greatly from person to person. MS can progress
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GP is the first person an individual see. GP role is to refer to a Parkinson’s specialist doctor. These include from different healthcare specialists they are psychologists‚ physiotherapists‚ neurologist and a geriatrician. A specialist nurse of Parkinson’s gives a skilled care as they tend to work with an individual of the disorder. They work in all areas including hospital‚ care home and the community. They provide individual a centred care and they assist with medications. Speech and language
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cord)‚ and the Peripheral Nervous System (neurons that carry messages to and from the CNS). 2. Describe the composition and function of the cell body. How are xons and dendrites alike? How do they (structurally and functionally) differ? The nerve cell body contains the nucleus‚ rough ER (Nissl bodies)‚ and cytoplasm. It is the major biosynthetic center and the main body for the outgrowth of neuronal processes. Axons and Dendrites are both arm-like extensions from the cell body. Dendrites are
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| Deficiency | In Abundance | Vitamin A | Liver ‚cod liver oil‚ carrots‚ spinach‚ sweet potatoes‚ peaches and cantaloupe. | * Growth and maintenance of epithelial tissue including the cornea‚ membranes of gastrointestinal tract and skin. * Nerve formation and function | Fat Soluble | In children‚ growth retardation‚ and impaired bone formation. Fetal malformations. | Fetal malformations | Vitamin B2 | Beef‚ liver‚ lean meat‚ kidney‚ non-fat milk‚ oysters‚ dark green leafy vegetables‚ |
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1m c The impulse spreads through the atria / right atrium / cardiac muscle 1m to the atrioventricular node‚ 1m then to the base of the ventricles along the septum. 1m Structured questions (p. 78) 7 a i Fall in pH / increase in acidity / carbon dioxide level 1m ii Respiration occurring inside the cells 1m b The respiratory centre sends impulses 1m to the diaphragm muscles / intercostal muscles‚ causing them to contract. 1m c As lungs inflate‚ the frequency of impulses from stretch
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