is a loss of pigment from areas of skin. That then results in irregular white patches of skin. Vitiligo occurs when the melanin forming cells‚ also called melanocytes fail to produce melanin. Melanin is the dark pigment that is in the epidermis that gives us our skin color. When the melanocytes fail to produce melanin‚ white patches of skin appear on the skin. Although we know how it occurs‚ we do not know why it does. There are many theories of why vitiligo does happen. These include immune system
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1.Explain the process of Cellular Respiration in order. Where does each step occur in a cell‚ which steps require oxygen‚ and how many ATP are produced in each step? Cellular respiration is the breakdown of glucose in the presence of oxygen to yield ATP. Glycolysis is the first stage in the breakdown of glucose and It occurs in the cell’s cytoplasm. It does not require oxygen (anaerobic). This step also occurs in two steps‚ the energy investment step‚ and the energy yielding step. This process yields
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150 words. 1. Puberty can be a difficult time for adolescents. What are some of the challenges they face? Puberty can indeed be a difficult time for adolescents. Many changes occur during puberty that adolescents are not used to‚ and these changes can confuse them. Puberty is the sexual maturation that occurs in adolescents‚ and encompasses many physical and psychological changes as a result in the rise of hormone levels. Some of these changes include the growth of pubic hair‚ changes in
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offeror‚ rather than the time it is sent by the offeree. (p. 37) ➢ The postal rule is the offeree (business) has accepted when they put the acceptance in the post. ➢ “The postal rule is unlikely to apply to email so acceptance would only occur if and when the customer accesses his or her email. … How can the online merchant prove that the customer actually opened and read an emailed acceptance?” ➢ Because the postal rule is unlikely to apply‚ sending an email is not constructive communication
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season and time: more meteors are seen in the autumn‚ and rates are highest as dawn approaches. This activity pattern for random‚ background sporadic meteors is enhanced at certain times of year by the occurrence of meteor showers. Meteor showers occur at the same time each year‚ as Earth in its annual orbit around the Sun ploughs through streams of debris. About twenty prominent showers are recognised‚ varying in activity from a handful of meteors per hour‚ to one per minute or more. Some can even
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mutations can sometimes occur in the coding sequences of these receptors‚ which would result in the formulation of the disorder‚ Familial Hypercholesterolemia‚ cardiovascular diseases‚ and other physical external symptoms on the outside of the body. The low density lipoprotein receptor gene is located on the 19th chromosome and is responsible for maintaining and regulating endocytosis of low density lipoprotein (LDL) in the body. [3] But missense mutations still do occur in the coding of the LDL
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What Is Operant Conditioning? Operant conditioning (sometimes referred to as instrumental conditioning) is a method of learning that occurs through rewards and punishments for behavior. Through operant conditioning‚ an association is made between a behavior and a consequence for that behavior. Operant conditioning was coined by behaviorist B.F. Skinner‚ which is why you may occasionally hear it referred to as Skinnerian conditioning. As a behaviorist‚ Skinner believed that internal thoughts and
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the PCB transformer‚ no PCB incidents will occur‚ and the only cost will be the cost of the transformer‚ $85‚000. Alternatively‚ if the company decides to keep the existing PCB transformer‚ then management estimates that there is a 5050 chance of there being a high likelihood of an incident or a low likelihood of an incident. For the case in which there is a high likelihood that an incident will occur‚ there is a .004 probability that a fire will occur sometime during the remaining life of the transformer
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different habitats from interbreeding. These species are referred to as sympatric species since they occur in the same territories. Individuals mate in their preferred habitat‚ and therefore do not meet individuals of other species with different ecological preferences. An example of ecological isolation occurs within the Rana genus. R. grylio‚ the pig frog and R. areolata‚ the gopher frog both occur around New Orleans‚ Louisiana. The exceptionally aquatic pig frog lives in deep ponds‚ lakes and marshes
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Spina Bifida is a neural tube defect which occurs in the embryo. The result is that the spine fails to close properly which causes‚ in the most severe cases‚ a protrusion of the spine through the lower back of the child; hence the Latin name of “split spine.” Depending on the type‚ spina bifida can cause paralysis‚ latex allergy‚ hydrocephalus‚ and more. There are three major types of spina bifida: occulta‚ meningocele‚ and myelomeningocele. Spina bifida occulta is the mildest form and does not
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