IGCSE Biology Paper-3: Specimen Questions with Answers 250 - 251 of 358
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Passage
shows a diagram of the heart.
Question 250 (3 of 4 Based on Passage)
Explanation
The right ventricle pumps the oxygen-poor blood to the lungs through the pulmonary valve. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mitral valve. The left ventricle pumps the oxygen-rich blood through the aortic valve out to the rest of the body.
Question 251 (4 of 4 Based on Passage)
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Short Answer▾The condition where watery faeces are lost from the body is called diarrhea.
Outline one way in which diarrhea can be treated.
Explanation
Treatment of Diarrhea
- plenty of fluids to prevent dehydration
- oral rehydration drinks to replace lost salts and minerals. These drinks are available from pharmacies. An alternative is one-part unsweetened pure fruit juice diluted with four parts of water
- intravenous replacement of fluids in severe cases
- medications such as antibiotics and anti-nausea drugs
- anti-diarrheal medications, but only on the advice of your doctor. If your diarrhea is caused by infection, anti-diarrheal drugs may keep the infection inside your body for longer.