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Bio genetics chapter 21
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Recommended: Bio genetics chapter 21
Introduction
Biology mainly concentrates on the study of life and any other factors that affect it positively or negatively. The study of biology is further sub-divided into sections and the most important being genetics that studies the genetically composition and effects to human life. For instance, gigantism which is an abnormal growth caused by the excess hormone growth at childhood before the bone plates closes. Though gigantism is rare, it is caused due to some factors among them; Noncancerous tumor of the pituitary gland, Neurofibromatosis, McCune-Albright Syndrome (MAS), Carney complex and Multiple Endocrine Neoplasia type 1(MEN-1). This abnormal growth occurs mainly before the closure of the bone growth plate. In any case the growth hormone occurs after the normal growth has stopped then the condition is known as acromegaly (Gina Gould ‘et al’, 2004).
There are several symptoms that can be used to detect the condition. It leads to the growth of the child in muscles, height and organs and hence the child being larger or bigger than his or her age. Other symptoms include; irregular periods, release of breast milk, weakness, increased sweating, thickening of the facial features, large hands and feet with thick fingers and toes, headache, delayed puberty, frontal bossing and a prominent jaw and double vision or difficulty with side vision. There are also some signs and test that can validate gigantism. The tests are; increased Insulin Growth Factor-I (IGF-1) levels, CT or MRI scan of the head showing pituitary tumor, high prolactin levels and failure to suppress serum Growth Hormone (GH) levels after an oral glucose challenge (maximum 75g). Damage to the pituitary generally leads to low levels of other hormones among the...
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...he growth hormones only have minor side effects on the users. The anabolic steroids are addictive while the growth hormones are not. The anabolic steroids cause withdrawal symptoms and cravings while the growth hormones do not cause withdrawal symptoms and cravings (Health beat RX, 2011).
Reference List
Bruce Mac Fadden, Gina Gould, (2004). Gigantism, Dwarfism and Cope’s Rule: “Nothing in
Evolution Makes Sense Without a Phylogeny”. Retrieved from:
http://www.rci.rutgers.edu/~wayner/Principles%20of%20Ecology%20course/island%20morphological%20adaptation.pdf
Health beat RX, (2011). The Differences between Steroids and Human Growth Hormone.
Retrieved From:
http://healthbeatrx.com/wp/the-differences-between-steroids-and-human-growth-hormone-hgh
Medical Discoveries, (2011). Hormone. Retrieved from:
http://www.discoveriesinmedicine.com/Enz-Ho/Hormone.html
ACHONDROPLASIA is known as being undersized, or less than 50in. in height. Having short limbs, a normal sized trunk, large head with a depressed nasal bridge and small face. This is a result of a disease in the thyroid gland. It can also be caused by Down syndrome or absorption, a cartilaginous tissue during the fetal stage. Hypochondroplasia, a mild form of dwarfism. Spinal tuberculosis and the deficiency of the pituitary gland secretions. Treatment with thyroxin or thyroid extract early in childhood results in normal growth and development. Somatrophin, also known as the human growth hormone is secreted by the anterior pituitary. Respiratory problems start to occur in infants. Symptoms of problems include snoring and sleeping with neck in a hyperextended condition. The limbs have rhizometic shortening. The legs are straight in infantry but when a child. He begins walking they develop a knock-knee position. When the child continues to walk legs begin to have a bowed-leg look. Occasionally, these curvatures are fixed. As the child continues to walk the kyphosis disappears and the back assumes a lordotic posture. If a delay in child’s walking occurs, the spine should be monitored closely for signs of gibbous formation. In infancy, hypercephalus can occur. Infants head circumference should be monitored close . Monthly checks of head circumference must be monitored. Radiologic studies are indicated if head circumference raises to disproportionately, or if symptoms of hydrocephalus. Child’s pediatrician should have a copy of head circumference curves for children with achondroplasia. Radiologic procedures for dwarfism include head ultrasound, C-T scan, or MRI of the head. If intervention is necessary, a ventriculoperitoneal shunt is placed relieving the pressure. Infants should also be monitored for foramen magnum compression. It is the opening at the base of the skull in which the brain stem and cervical spinal cord exit. When you have achondroplasia the foramen magnum is compressing the brain stem and spinal cord. Symptoms of narrowing include apnea the cessation of breathing and cervical myleopathy. C-T scans and MRI scans are done to examine the size of the infectious foramen magnum. A neurosurgical procedure called a foramen magnum decompression is executed to alarge foramen and alleviate further symptoms. Adolescents are at risk of getting lumbosacral spinal stenosis. The lumber spinal cord or nerve roots become compressed producing nerosurgical symptoms. Initial symptoms including weakness, tingling, and pain of the legs. Pain usually alleviated by assuming a squatting position.
ACH, is an interesting disease, one that after many years of research still remains a partial mystery. The fact that a single nucleotide on one chromosome can so greatly affect an individual is astounding, especially coupled with the fact that this mutation is so homogenious in genotype and phenotype. With more skeletal dysplasias being connected to FGFR3, research has increased to fully determine and define the pathways involved with this gene. Determining the reason for such a high mutation frequency and the link to paternal age are also being looked into. Once there is more understanding of how this mutation affects the body, treatments and possibly cures can be found for these individuals.
Congenital Adrenal Hyperplasia (CAH) is an inherited condition that affects hormone production in the adrenal gland. The individual lacks enzymes to make cortisol, and hormones are instead are shifted away to make other hormones, specifically androgens. This results in the deficiency of cortisol and the abundance of testosterone.
When the children are diagnosed they have a number of symptoms that point towards progeria. When they are born there is no sign that they have progeria. They look like normal babies. They start having the appearance of someone with progeria as they get into their first or second birthday. They start to loose all of their hair, including the eyebrows, their veins start sticking out like an elderly person's would. They have ears that have no ear lobes and that stick out a lot."A broad, mildly concave nasal ridge nose, prominent eyes, thin lips and micrognathia (small jaw) with a vertical midline groove in the chin."(Baek, McKenna, Eriksson, 2013) Their teeth grow slowly...
Achondroplasia is a genetic disorder in which there is a growth hormone deficiency, or there is a genetic mutation in either the father’s sperm or mother’s egg. Mayo Clinic, March 20, 2014. Achondroplasia was the first discovered in ancient Egyptian records. People with achondroplasia are considered people with supernatural powers. Many people call dwarfs midgets, but to them, it is very disrespectful because midget literally means little person.
Acromegaly is a pituitary gland disorder that is an unusual and rare disease that comes from the hypersecretion of growth hormone during adulthood. It is rare in that acromegaly occurs in about 5 cases per million per year (Lugo 2011). Acromegaly if often labeled as a prolonged metabolic condition that is characterized by steady enlargement or elongation of facial bones and extremities (Thibodeau, 2013). This paper will explain the disease and how it affects the body, how one who has the disease might act and how to diagnose the disorder, and how to treat the disorder and ways for prevention of acromegaly.
"Anabolic steroids is the familiar name for synthetic substances related to the male sex hormones (e.g., testosterone). They promote the growth of skeletal muscle (anabolic effects) and the development of male sexual characteristics (androgenic effects) in both males and females”(National Institute on Drug Base).First, the benefits of steroids are very obvious to see. The user gains strength, mass, and speed in a short amount of time. Also, the user has a more aggressive attitude, which is good for football players. However, there are more bad side effects than good. The side effects include hair loss, acne, liver damage, kidney damage, increased breast tissue and becoming very aggressive. These are just some of the horrible bad side effects by using steroids.
The human genome is a remarkable system composed of over 3 billion DNA base pairs that encode for the characteristics that makes people distinctly human and unique themselves. Without the genome’s nearly flawless ability to self-replicate the human species would cease to exist. As incredible as this replication methodology is, it is not without its faults. Genetic mutations, though rare and typically harmless, can strike at any time and in various ways. Still, when they do cause harm the effects can be profound and impossible to ignore. Hutchinson-Gilford Progeria Syndrome (HGPS) is an instance where the mutation of just one nucleotide has devastating results. The Mayo Clinic defines progeria as a progressive genetic disorder that causes children to age rapidly, beginning in their first two years of life. This study defines the disease of progeria by outlining symptoms and identifying causes that lead to its diagnosis. In addition, treatment methods and extensive research that give those affected by the disease hope for a brighter future are highlighted.
Over one million American seek short cuts to larger muscles and greater endurance with anabolic steroids and other performance enhancing drugs. Steroids are drugs that act like chemical in the body. Most steroids are transformed into testosterone when they enter the body. Testosterone is a male growth hormone. While user may gain short-term results, they are seriously shortchanging their health (Kalawalski 13-15).
Intrauterine Growth Retardation (IUGR) is referred to fetal growth that has been restricted by insufficient fulfillments of nutritional requirements. ...
There are no dates given on the exact history of FTT and it seems that this affliction has been in existence since the beginnings of time. Scoller and Nittur (2012) claims FTT is a clinical condition, as opposed to a diagnosis and it is a label given to infants and children with inadequate growth or weight gain(1234). Growth is commonly assessed at health visits by measuring height, weight, and head circumference.
Two to six children out of every thousand will end up with Autism. Autism is one of the fastest growing disorders with a great amount of studies being put behind it. With its vast amount of different signs and symptoms, different forms, how its treated, and arguments about how exactly the disorder came to be , Austin can very well be one of the most confusing, and researched disorders, for its a disorder that stirs up tons of questions but yet gets hardly any answers. Autism is usually developed between ages of one and three, it effects communication and how the child interacts with others. It is defined by behaviors of the child and “ spectrum disorders” that re different with each person. (About Autism, 2008, para 1). Symptoms of autism can very in many different ways, and even different categories. Take the category of social interaction and relationships symptoms include : non verbal communication development problems such as , eye - to - eye gazing, body language, and facial expressions, failure to make friends with people their own age, lack of interest, and lack of empathy. The category for verbal and non verbal symptoms include : Delay or lack when learning to talk, about forty person of people with autism never speak, problems with starting, and keeping conversations, repetitive use of language, and difficulty understanding what someone is saying. Finally the category of interests and play include : unusual focus on pieces, preoccupation on certain topics, a need for the same routine, and stereotyped behaviors like hand flapping and body rocking.
Swan, S.H., F. Liu, J.W. Overstreet, C. Brazil, and N.E. Skakkebaek. "Growth Hormones Fed to
Steroids increase the rate of protein synthesis within the cells. Athletes use anabolic steroids; Anabolic steroids resemble androgenic hormones such as testosterone (2). These steroids enhance weight gain, speed, power, and aggressiveness. The intake of anabolic steroids induces an increase in muscle size by both hypertrophy and the formation of new muscle fibers (1). Anabolic steroids have an androgenic and anabolic effects, which are essentially the male hormone testosterone. Androgenic eff...
There are three areas the can be attributed to the cause of gynecomastia: physiologic, pathologic and pharmacologic. "Enlargement of the male breast can be a normal physiologic phenomenon at certain stages of life or the result of several pathologic states."(Isselbacher, 2037)