number of cells. It is the result of increased cell mitosis‚ or division. The two types of physiologic hyperplasia are compensatory and hormonal. Compensatory hyperplasia permits tissue and organ regeneration. It is common in epithelial cells of the epidermis and intestine‚ liver hepatocytes‚ bone marrow cells‚ and fibroblasts. It occurs to a lesser extent in bone‚ cartilage‚ and smooth muscle cells. Hormonal hyperplasia occurs mainly in organs that depend on estrogen. For example‚ the estrogen-dependent
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incident later‚ she told me this patient has always been difficult and demanding and never the less he shouldn’t have spit at me‚ but also‚ Instead of giving him a subcutaneous injection‚ I could have held the needle at the wrong angle and given him an epidermis one‚ and maybe that was the cause of the pain. One positive aspect is that I finished the injection and disposed the sharps first‚ but I should have be more aware of body fluid exposure. Also‚ when the incident happened‚ I left without trying
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The word melanoma comes from the Greek words‚ melas (black) and -oma (tumour). It is a very serious cancer that most often occurs in the skin and less frequently in the eye or in the lining of the nose‚ mouth‚ or genitals. Melanoma begins in melanocytes‚ cells that make a pigment called melanin. Both light- and dark-skinned people have melanin‚ which gives colour to the skin‚ hair‚ and parts of the eye. The skin is the largest organ in the body‚ so it isn’t surprising that skin cancer is the most
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such as the shins‚ touch receptors would be less dense because you wouldn’t want to feel all that pain all the time. Meissner’s corpuscles are light touch receptors in the skin which are prone to touch sensitivity. They are located just under the epidermis‚ which makes sense because they are closer to
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I. Introduction A. Importance of systems B. The major systems 1. List all the systems a. Circulatory System b. Integumentary System c. Skeletal System d. Muscular System e. Nervous System f. Endocrine System g. Lymphatic System (Immune system is a part of this) h. Respiratory System i. Digestive System j. Excretory System (Urinary system is a part of this) k. Reproductive System C. Systems to be discussed 1. Circulatory System (NCES) 2. Integumentary System 3. Skeletal System 4
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glass slide small plastic cover slip iodine stain pipette tweezer paper towel strip small beaker Salt solution STEPS 1. Carefully remove the outer layer of cells (epidermis) of a piece of red onion. 2. With the slide on your desktop‚ place a drop of water on the center of a clean dry slide. 3. Using the tweezers‚ place the onion in the middle of the drop. 4. While holding the cover slip upright‚ carefully place one
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Case Study of Pre-Tibial Laceration I have chosen the injury known as ‘pre-tibial laceration for my case study. Pre-tibial lacerations or skin tears are acute wounds caused by trauma and most common in older people‚ pre-dominantly women. They can often develop into chronic wounds‚ involving necrosed tissue and become difficult to heal due to factors such as the patients age and other co-existing disease processes‚ also the pre-tibial region of the leg naturally has a poor vascular network. Most
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Esophageal cancer‚ more common around the world than in the United States‚ is cancer in the esophagus. The esophagus is a long‚ hollow tube that connects the throat to the stomach. The esophagus is approximately 8 inches long‚ and is lined by mucosa. There are two main types of esophageal cancer: Squamous cell carcinoma and adenocarcinoma. Squamous cell carcinoma begins in cells lining the esophagus while adenocarcinoma begins in the cells that produce and release mucus and other fluids. The main
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Anaemia – a condition where there is a reduction in the number of red blood cells and a deficiency of haemoglobin in the blood. Possible Causes of Anaemia – severe blood loss‚ failure of the bone marrow to produce red blood cells‚ genetic inability of red blood cells to carry oxygen adequately‚ destruction of red blood cells by the body or foreign substances‚ dietary (problems with child growth). Common types of Anaemia – Iron deficiency – lack of iron which is the main constitute of Hb‚ pernicious
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(4/2010) Basic metabolism of terrestrial organisms: plants take in CO2 and H2O and relseas CH2O and O2 which mammals take in and then give off CO2 and H2O Gas is exchanged though the opening of the stoma between two guard cells of the leaf epidermis. Flaccid- when stoma is closed Turgid- when stoma is open Factors that influence stomatal diameter enlarging stoma | reducing stoma | abundant waterabundant lightlow internal CO2 | water deficitdarknesshigh internal CO2 abscisic acid hormone
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