An example of an exam questions showing data of substances in the blood plasma.
The concentration of the substances in the fluids is measured in grams per dm3.
Substance | Blood plasma | Filtrate in the kidney tubules | Urine |
---|---|---|---|
Water | 850.0 | 850.0 | 900.0 |
Protein | 75.0 | 0.0 | 0.0 |
Glucose | 0.9 | 0.9 | 0.0 |
Amino acids | 0.4 | 0.4 | 0.0 |
Urea | 0.3 | 0.3 | 22.0 |
Sodium ions | 2.7 | 2.7 | 3.6 |
Question
Describe the similarities and differences between the levels of substances within the three different fluids in the table. Include at least three examples of substances in your answer.Hide answer
Certain substances remain the same in the blood plasma and filtrate such as water (850 g/dm3), glucose (0.9 g/dm3 ), amino acids (0.4 g/dm3 ), urea (0.3 g/dm3 ) and sodium ions (2.7 g/dm3 ).
When comparing the three fluids, a number of substances differ such as water, protein, glucose, amino acids, and urea and sodium ions. The water is more concentrated in the urine (900 g/dm3 ) than in the filtrate (850 g/dm3 ); the protein in the plasma is at 75 g/dm3 but at 0 g/dm3 in the urine. The glucose is at 0.9 g/dm3 in the plasma and filtrate but 0.0 g/dm3 in the urine.When describing any data from tables or graphs, it is useful to include actual data within your answer. Remember units are also important.