Dwarfism is a genetic abnormality‚ that results in short stature. Most people consider dwarfism to be an adult height of four feet ten inches and under. Someone can develop dwarfism from different genetic‚ and other conditions. It is estimated that between one in every 14‚000‚ and one in every 27‚00 people are born with dwarfism each year. There are many different conditions that cause dwarfism. Some of these conditions are a bone disorder called skeletal dysplasias. The skeletal dysplasias are
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gigantism is known to be caused by a tumour of the pituitary gland‚ a gland located at the base of the brain from where it releases hormones that regulate several functions of the body – one being growth. Pituitary tumours can cause tissues to grow abnormally resulting in certain changes in facial appearance‚ enlarged hands and feet‚ headache and sweating – eyesight too can be affected; this condition is called acromegaly. If someone has excess growth hormone‚ they become excessively tall and become
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Take a look at the following case studies that detail an outcome associated with a disease/organ malfunction. Select one study to investigate further for your assignment. Critically evaluate the information provided and correlate it with the organ systems that are affected in the scenario. Use the information that you have gathered to answer the assignment questions that follow the case study. For assistance with your assignment‚ please use your text‚ the AIU Library‚ Web resources‚ and course
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anterior lobe secretes at least seven hormones. One hormone‚ the human growth hormone (HGH)‚ promotes body growth by accelerating protein synthesis. This hormone is also known as somatotropin. A deficiency of the hormone results in dwarfism; an over secretion results in gigantism. Another hormone of the anterior pituitary is prolactin‚ also called lactogenic hormone (LH). This hormone promotes breast development and milk secretion in females. A third hormone is thyroid-stimulating hormone (TSH). The function
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Hyperpituitarism Define- a chronic and progressive disease‚ is caused by excessive production and secretion of pituitary hormones‚ for example‚ human growth hormone. Gigantism Define- describes an abnormal pattern and stature. Symptoms and Signs- When the hypersecretion of GH occurs before puberty‚ the result is gigantism‚ a proportional overgrowth of all body tissue. A child experiences abnormal and accelerated growth‚ especially of the long bones‚ because epiphyseal closure has not begun
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estrogen. LH triggers ovulation and stimulates the production of estrogen and progesterone In males FSH stimulates sperm production and LH stimulates production of testerone Hyposecretion (not enough) results in dwarfism in children Hypersecretion (excessive) causes gigantism in children and acromegaly (overgrowth of bones in hands‚ feet‚ & face in adults causes the distal and collecting tubules of the kidneys to reabsorb more water from the urinary filtrate‚ thereby reducing urine
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Hyper & Hypopituitarism Introduction Hyperpituitarism is the result of excess secretion of adenohypophyseal trophic hormones. Hypopituitarism is the decreased secretion of one or more of the pituitary hormones. If there is decreased secretion of most pituitary hormones‚ this condition is called panhypopituitarism (pan meaning "all"). Historical Background The pituitary was known by Galen‚ and various theories were proposed about its role in the body. In the late 19th century‚ acromegaly
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Biology 136 Final Exam 13-7 1) Which of the following is NOT TRUE for the normal cerebrospinal fluid b) no blood but nutrients for brain tissue c) blood does not normally cross the blood brain barrier (BBB) 13-74_2) A cerebral vascular accident is also referred to as a (CVA) = Stroke ← Most commonly caused by hypertension and long standing ateriosclerosis ← Aneurysms; weakened blood vessels ← Hemorrhage into the brain tissue damages the neurons‚ causing a sudden loss
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LAB #2 QUESTIONS PART A: ENDOCRINE GLANDS OF THE HUMAN 1. Complete the following chart: Please see the attached chart for the Endocrine System. 2. Explain the mechanism of communication‚ control‚ and integration in the endocrine system. The Endocrine systems mechanism of communication is sending messages from the cells of the endocrine and nervous system to the cells in other systems by releasing hormones. The Endocrine systems control feature is part of negative feedback because it
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When populations share genetic background and environmental factors‚ average height is frequently characteristic within the group. Exceptional height variation (around 20% deviation from average) within such a population is sometimes due to gigantism or dwarfism‚ which are medical conditions caused by specific genes or endocrine abnormalities.[1] In regions of poverty or warfare‚ environmental factors like chronic malnutrition during childhood or adolescence may account for delayed growth and/or marked
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