IGCSE Biology Paper-4: Specimen Questions with Answers 248 - 250 of 279

Passage

Doctors recommend that a healthy diet can reduce the risk of coronary heart disease.

Question 248 (1 of 2 Based on Passage)

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Give one other lifestyle improvement patients can make that can reduce the risk of coronary heart disease.

Explanation

Lifestyle improvement in patients to reduce the risk of coronary heart disease:

  • Stop smoking
  • Choose good nutrition

  • Decrease high blood cholesterol

  • Lower high blood pressure

  • Be physically active every day

  • Aim for a healthy weight

  • Manage diabetes

  • Reduce stress

  • Limit alcohol

Question 249 (2 of 2 Based on Passage)

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Sometimes surgery is required to treat coronary heart disease.

Describe one named example of surgery that can treat coronary heart disease.

Explanation

Coronary Artery Bypass Grafting

During CABG, a healthy artery or vein from the body is connected, or grafted, to the blocked coronary artery. The grafted artery or vein bypasses (that is, goes around) the blocked portion of the coronary artery. This creates a new passage, and oxygen-rich blood is routed around the blockage to the heart muscle. The Saphenous vein is the longest vein in human body and is also used in coronary artery bypass grafting (CABG) .

Normal Heart and Artery

Question 250

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People that eat a diet that is high in fats are often advised to reduce their intake of fats.

Suggest the health benefits of this change in diet.

Explanation

Some of the Advantages of a Low-Fat Diet

  • May help keep insulin levels low.
  • May be good as a preventative measure against various diseases which can, in part, be attributed to high fat and cholesterol – such as heart disease, stroke and gallbladder disease.

  • Can help people who are trying to lose weight, and can also aid in maintaining a good weight.