• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Cholesterol in the diet causes coronary heart disease

Extracts from this document...

Introduction

'Cholesterol in the diet causes coronary heart disease' Coronary heart disease (CHD) is damage to or malfunction of the heart, caused by narrowing or blockage of the coronary arteries, which supply blood to the heart muscle. The two most common features of Coronary heart disease are angina pectoris (which is a chest pain that is caused by lack of blood to the heart muscle) and Myocardial Infarction (which is a common heart attack). * * A Myocardial Infarction is caused by plaque blocking the artery; plaque is a greasy layer of proteins, fats (including cholesterol) and immune system cells that accumulate on the inner walls of the Coronary arteries. In the UK we have one of the highest rates of Coronary Heart disease in the world. Between the ages of 45 and 64 CHD accounts for one third of all deaths. In most developed countries deaths from CHD have dropped in the past 20 years, possibly because we are wiser to the risks, but predominantly because of better medical treatment around hypertension (high blood pressure). ...read more.

Middle

The pain is a dull ache in the chest or a pressured feeling which may spread up the neck or down the arms. The pain usually comes after a certain amount of exertion (e.g. after walking up the stairs) and then disappears after resting for a while. Angina can also occur when the heart muscle is working hard and getting too little blood for the amount of effort being expended. If the blood supply to part of the muscle is cut off completely by a blood clot in one of the coronary arteries then you would experience an acute myocardial infarction. The main symptom is intense chest pain of the same type as in angina pectoris, but cannot be relieved by rest and is not brought on by immediate exertion. The person may also become very cold, sweat profusely, feel weak and nauseated and may even loose consciousness. ...read more.

Conclusion

Some people who have had relatives that have died of myocardial infarctions or have suffered strokes before the age of 50 are advised to have their own blood checked. After having looked in depth to both CHD and Cholesterol it is clear to see that there is a link between Cholesterol leading to CHD. However it is not all Cholesterol that is bad for you. The HDL's (high density lipoproteins) in the blood are good and protect against getting CHD by picking up the cholesterol from dying body cells and transporting it to the liver where it can be excreted in some form. It is the LDL's (low density lipoproteins) and VLDL's (very low density lipoproteins) that are proven to be greater causes of CHD as they carry the lipids and the cholesterol from the liver to other tissues. In putting the cholesterol back into the tissues it is not able to be disposed of like in the liver meaning that it blocks up slowly, leading to atherosclerosis, in turn steadily building up towards coronary heart disease. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Genetics, Evolution & Biodiversity section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Genetics, Evolution & Biodiversity essays

  1. Marked by a teacher

    MENTAL HEALTH

    4 star(s)

    When the brain is not working properly, one or more of its six functions will be disrupted (thinking or cognitive, perception or sensing, emotion or feeling, signalling, physical functions and/or behaviour). When these functions significantly disrupt a person's life, we say that the person has a mental disorder or a mental illness.

  2. Parkinsons Disease

    * Stiffness of muscles (rigidity) and muscles may feel tenser. Also, your arms do not tend to swing as much when you walk. * Shaking (tremor) is common, but does not always occur. It normally affects the fingers, thumbs, hands, and arms, but can affect other parts of the body.

  1. Biology Coursework: Does Acupuncture relieve pain?

    Decreased activation in these areas was noted following both meridian acupuncture and sham acupuncture. So, is the acupuncture effect real or simply a placebo effect? If it is real, is acupuncture in reality point specific? The study attempted to answer some of these questions using functional brain imaging.

  2. Defense in the blood

    Doolittle's essay can be found at http://www.polisci.mit.edu/bostonreview/BR22.1/doolittle.html). I had devoted a chapter of Darwin's Black Box to the blood-clotting cascade, asserting that it is irreducibly complex and so does not fit well within a Darwinian framework. Doolittle, an expert on blood clotting, disagreed.

  1. Can relapse in acute lymphoblastic leukaemia (ALL) be prevented?

    Immunotherapy is the use of the body's natural substances to slow growth and spread of leukemia and to overcome treatment side affects like nausea. Growth factors are commonly used between chemo treatments to restore and promote the production of healthy cells within the bone marrow.

  2. Research on mad cow disease and creutzfeldt-jacob disease

    everything in the human body will cease to function correctly, such as eyesight, speech, movements etc. as predicted in the very late stages on the disease people tend to experience involuntary jerking limbs, tremors. They will also lose the ability to move or talk completely leaving them in a vegetated state.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work