Joseph’s Story The Cellular lever is essential to the homeostasis of an entire organism. In this case study you will learn the impact that a Myocardial Infarction (Heart Attack) has on heart cells. The Patient (Joseph) is a 38 year old male who started back smoking after quitting for 3 years. He has been busy working long hours and the stress of his job was wearing on his body. Joseph was playing catch with his 12 year old Marcus when his heart stopped beating. Do to the loss of Oxygen‚ Blood
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MYOCARDIAL INFARCTION AND THE AGING ADULT Acute Coronary syndrome (ACS) is an emergent situation characterized by an acute onset of myocardial ischemia that results in myocardial death (i.e.‚ MI) if definitive interventions do not occur promptly. (Although the terms coronary occlusion‚ heart attack‚ and myocardial infarction are used synonymously‚ the preferred term is myocardial infarction.) The spectrum of ACS includes unstable angina‚ NSTEMI‚ and ST-segment elevation of myocardial infarction
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PATHOPHYSIOLOGY OF MYOCARDIAL INFARCTION Mechanisms of Occlusion Most MIs are caused by a disruption in the vascular endothelium associated with an unstable atherosclerotic plaque that stimulates the formation of an intracoronary thrombus‚ which results in coronary artery blood flow occlusion. If such an occlusion persists long enough (20 to 40 min)‚ irreversible myocardial cell damage and cell death will occur.5 The development of atherosclerotic plaque occurs over a period of years to decades
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Homeostatic Mechanisms Homeostatic mechanisms are essential for a body to maintain a stable condition. The word homeostasis describes the body’s ability to maintain its healthy state‚ while the world around it is changing constantly. There are many steps in the process of homeostasis. First‚ there is the stimulus that causes the change. Then the receptor detects the change. The information of the imbalance is then sent to the control center‚ which decides the response. The information entering into
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attacks ‚ we have all seen them played out on our favorite drama shows but these shows do not address the real severity of an actual heart attack despite the great acting skills portrayed . A heart attack can also be known as a myocardial infarction (MI)‚ acute myocardial infarction (AMI)‚ acute coronary syndrome‚ coronary thrombosis‚ or coronary occlusion‚ either way it is not good news. Over 1.2 million people in American have heart attacks with many of them resulting in death (Heart attack‚ 2011). A
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Riya Ragbarsingh General Biology Dr. Samira Ziaei-Halaby May 8‚ 2012 Myocardial Infarction Myocardial Infarction also known as “heart attack”‚ is when a damaged muscle or artery is blocked preventing the blood to flow through. Because of fast food places such as McDonalds‚ Burger King‚ Wendy’s and etc… Most Americans prefer eating outside than having a healthy home cooked meal. Many people do not realize the amount of fatty and oily substances that are in the meals that are being cooked
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Myocardial infarction is the biological name for a heart attack. Coronary atherosclerosis is a chronic disease that has stable and unstable times. During unstable times with inflammation in the vascular wall‚ patients develop a myocardial infarction. Myocardial infarction may be a minor event in a lifelong chronic disease‚ it may even be undetected‚ but it may lead to sudden death or severe ‘haemodynamic’ deterioration. A myocardial infarction is the first biggest of coronary artery disease / it
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Body fluids are maintained at a constant level by several homeostatic mechanisms: Osmosis- is the diffusion of water through a selectively permeable membrane known as a plasma membrane. Water is highly polar it is repelled by the lipid core (nonpolar) of the plasma membrane but can easily pass through the aquaporins created by the proteins in the membrane‚ so osmosis is happening all the time as water moves into and out of cells. Diffusion- Is where ions move away from an area where they are
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concentration is concentrated by the pancreas‚ which produces a hormone known as the insulin; this hormone is able to reduce the blood glucose levels. If there is not enough produced then the disease diabetes is developed. Negative feedback mechanisms: ‘a body system that monitors a system output‚ that shuts off once an optimum output level is achieved and turns on if the output level dropped below optimum’ (reference: Walsh‚ 2010)For example if the body temperature is too hot then it will
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Understand how homeostatic mechanisms operate in the maintenance of an internal environment Homeostasis is keeping the body balanced to allow cells to function‚ despite external environment. Homeostasis is important because the cells‚ blood and tissue fluids can change by slowing down or even stop a vital chemical reaction. Its aim is to keep the body to stay the same‚ at a normal condition. Negative feedback is when change is detected; there are steps when change is detected to get it back
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