With reference to a normal human being consider the following statements : I. Sugar appears in the urine if blood sugar exceeds 180 mg per 100 ml. II. Liver synthesises cholesterol and secretes it into blood. III. Blood plasma contains 92 per cent water a

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Q: 115 (CDS-I/2003)
With reference to a normal human being consider the following statements :
I. Sugar appears in the urine if blood sugar exceeds 180 mg per 100 ml.
II. Liver synthesises cholesterol and secretes it into blood.
III. Blood plasma contains 92 per cent water and 8 per cent solids.
IV. The total number of erythrocytes per microlitre of blood in adult male human beings averages 5-million.
Which of these statements are correct?

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,12,16,5,5,6,12

keywords: 

{'erythrocytes': [1, 0, 1, 0], 'blood sugar': [1, 0, 0, 0], 'blood plasma': [1, 0, 2, 0], 'male human beings averages': [0, 0, 1, 0], 'blood': [5, 0, 0, 1], 'urine': [1, 0, 1, 2], 'cholesterol': [2, 0, 1, 1]}

The correct answer is option 4, which states that all the given statements are correct.

Let`s analyze each statement:

Statement I: Sugar appears in the urine if blood sugar exceeds 180 mg per 100 ml. This statement is correct. When blood sugar levels rise above a certain threshold, the kidneys cannot reabsorb all the sugar, resulting in its appearance in the urine.

Statement II: The liver synthesizes cholesterol and secretes it into the blood. This statement is correct. The liver produces cholesterol, which is an important component of cell membranes and is also used in the production of hormones and bile acids. The liver releases cholesterol into the bloodstream for transportation to different cells and organs.

Statement III: Blood plasma contains 92 percent water and 8 percent solids. This statement is correct. Blood plasma primarily consists of water, which makes up the majority of its composition. The remaining 8 percent consists of various substances such as proteins, electrolytes, hormones, and waste products.

Statement IV: The total number of erythrocytes (red blood cells) per microliter of blood in adult male human beings averages 5-million. This statement is correct. A normal adult male has an average of around 5 million red blood cells per microliter of blood