Blood
A. Makes up about 7 per cent of body weight.
B. Forms a higher percentage of body weight in fat than in thin people.
C. Volume can be calculated by multiplying plasma volume by the haematocrit (expressed as a percentage).
D. Volume rises after water is drunk.
E. Expresses serum when it clots.
Isha@2663 Answered question August 19, 2024
A. Makes up about 7 percent of body weight.
- This is generally correct. Blood typically constitutes about 7-8% of an individual’s body weight.
B. Forms a higher percentage of body weight in fat than in thin people.
- This is incorrect. Blood volume is relatively stable and does not vary significantly with body fat percentage. It is usually about the same percentage of body weight regardless of body fat.
C. Volume can be calculated by multiplying plasma volume by the haematocrit (expressed as a percentage).
- This is correct. Blood volume can be estimated using the formula: Blood Volume = Plasma Volume / (1 – Haematocrit).
D. Volume rises after water is drunk.
- This is correct. Drinking water increases blood plasma volume temporarily, thereby increasing overall blood volume.
E. Expresses serum when it clots.
- This is incorrect. Serum is the liquid part of blood that remains after clotting has occurred and the clotting factors are removed. Blood that clots does not directly “express” serum; serum is a byproduct of the clotting process.
Isha@2663 Answered question August 19, 2024