Wut r the two main biological roles of adrenaline, explaining a potential therapeutic application of EACH role
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Fight and Flight: Cardiac arrest resuscitation.
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Blood's role in the body is three fold: First, it acts as a transort system for nurtients and such to reach the different parts of the body. Secondly as a defence system, where lymphocytes are active in controlling pathogens that enter the body (such as bacteria, viruses, fungi, etc). Lastly, the blood acts as a sealant. When there is damage to the body, the platelets in the blood seal up the wound.\n\nBlood is very important to the body. Without it, you wouldn't exist.
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1.it helps the body to combat emergency.....thus used as life saving drug\n2.act as neurotransmitter....involved in treatment of neuro disorders such as alzheimers n parkinsons
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It is a neurotransmitter in the catecholamine family that mediates chemical communication in the sympathetic nervous system, a branch of the autonomic nervous system. Like other neurotransmitters, it is released at synaptic nerve endings to transmit the signal from a nerve cell to other cells. Norepinephrine is almost identical in structure to epinephrine, which is released into the bloodstream from the adrenal medulla under sympathetic activation. The sympathetic nervous system functions in response to short-term stress; hence norepinephrine and epinephrine increase the heart rate as well as blood pressure. Other actions of norepinephrine include increased glycogenolysis (the conversion of glycogen to glucose) in the liver, increased lipolysis (the conversion of fats to fatty acids; in adipose (fat) tissue, and relaxation of bronchial smooth muscle to open up the air passages to the lungs. All of these actions represent a mobilization of the body's resources in order to meet the stressful challenge–such a response is often termed the "flight or fight" syndrome.
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The adrenal medulla secretes adrenalin and noradrenalin.\nUnlike the cortex it is derived from neural crest cells, but unlike a previous answer they are NOT neurons: believe me I look at them every week!\nIt is the 'fear, flight, fright' hormone and is essential: responsible for butterflies in the stomach and more postive reactions to stress. It elevates the blood pressure.\nTumours of the medulla are called Phaeochromocytomas. They are rare, 10% are malignant and they cause flushing and high blood pressure and are dangerous unless removed by a skilled surgeon.\nHope that helps!
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a) Epinephrine \n\nEpinephrine is also known as "adrenaline".\n\nhttp://en.wikipedia.org/wiki/Epinephrine\n\nEDITED...oops I meant a not b.
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it has much to do with the formation of memories, but it also deals with emotional responses and motovation.  It does so by sending signals via the endocrine system (hormones) and the autonomic nervous system.
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The answer is (b) noradrenaline.  The adrenal medulla is the inner portion of the adrenal gland. The adrenal medulla secretes the stress hormones noradrenaline and adrenaline.
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Hormonal activity is usually a negative feed back mechanism. You would think exercise would feed forward, though, as the rate would keep increasing. Not my area, though, so a functional biologist is needed here.
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If you are talking about THYMUS gland,it works mainly in childhood and plays an important role in providing IMMUNITY.In adults it desends from neck to chest.In some adults it may retain the function.It produces what is medically called a CHOLINESTERAGE INHIBITING HORMONE. This is needed to keep musclar tone. Deficiency of this hormone causes  EXTREME MUSCULAR WEAKNESS ( MYASTHENIA GRAVIS ).A greek billionaire   died of this disease.An Indian VIP who underwent successful treatment  is alive and kicking.Medical ethics is not to reveal their names.
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Adrenaline (epinephrine) causes the pupil to dilate and the upper eyelid to raise a little bit more.  This is considered an evolutionary benefit in the "fight or flight" phenomenon as it helps seeing while you are fighting/running.
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Both steroid and thyroid hormone families of receptors can be used to regulate protein functions.
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Its all to do with adrenaline.  We spend alot of our working lives with too much to do and not enough time.  In these situations, our adrenal glands release adrenaline.  Our bodies respond by increasing our blood supply to our brain and muscles.  Our primitive ancestors would have had this response in situations of combat, and this enabled them to think quickly and fight or run away.  Most of us rarely fight.  However, when we leave work to the last minute, the adrenaline results in increased increased brain activity, and therefore a better end product. Through an accumulation of past experiences, we learn that in these situations, we actually do produce the goods.  Inevitably, this is a better use of our time, but has unfortunate results on our health.
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It contains a benzene ring with a small side chain and a number of hydroxyl groups-It is also called epinephrine in the US (adrenaline is the British name).
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Similarities:\n1. Both project effects to remote sites in the body.\n2. Both use negative and positive feedback systems. (e.g. The parasympathetic and sympathetic nervous systems and the hormones with opposite effects).\n3. Both project effects on each other.\nDifferences:\n1. The nervous system usually responds to events that require a fast response, and are short in duration, while the endocrine system is usually reponsible for handling/regulating long-term things. \n2. The nervous system projects its effects to a discrete region. The endocrine system generally projects body wide.\n3. Sorry I can't recall a third attribute right now.
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Neural stimulus of the endocrine organ (eg. sympathetic nerve stimulus of adrenal gland to release adrenaline/epinephrine)\n\nIntrinsic stimulus by organ itself (eg. parathyroid glands react to low serum Ca levels & release parathyroid hormone)\n\nHormonal stimulus of the organ (eg. pituitary gland releases thyroid stimulating hormone to act on the thyroid gland to release growth hormone)
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G'day Joanne F,\n\nThank you for your question.\n\nIt is essential if you are studying medicine to have a good understanding of how cells and tissues work. It is also useful to know how particular cells such as blood cells work.\n\nRegards