16. In an investigation, the appropriate composition of plasma, glomerula filtrate and urine in a mammal...

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16. In an investigation, the appropriate composition of plasma, glomerula filtrate and urine in a mammal was determined. The results were as shown on the table. Component Urea Uric acid Glucose Amino acids Plasma proteins Salts 1.2 Plasma g/100cm³ 0.9 Quantity 0.6 of Urine 0.04 0.3 0.005 (a) Account for the absence of; (i) Plasma protein in glomerula filtrate. (ii) Glucose and amino acids in urine. 0 0.20 0.07 A 9.00 0.84 Glomerula g/100cm³ 0.04 0.005 0.20 B 0.07 0.00 0.84 Urine g/100cm³ 2.10 (b) (i) From the above results, identify two types of wastes eliminated from mammalian blood. (ii) Other than excretion, give one other function of the mammalian kidney. (c) (i) State the principal requirement of filtration that forms glomeruli filtrate. (ii) How is the requirement identified in c(i) above achieved in the kidney? 0.70 0.00 D 0.00 (3mks) (d) Describe the process of urea formation. (e) Quantity of Urine passed per day was established in five mammals A, B, C, D and E of the same species in their natural habitats. The results are shown below. 0.00 1.96 (2mks) (2mks) C E (i) Which of the five Mammals was likely to be excreting Urine very rich in ammonia? Give a reason. (2mks) (1mk) (1mk) (2mks) (2mks) (ii) Which of the five mammals was likely to be living in a desert? Give a reason. (2mks) (iii) State two structural differences expected in the nephrons of mammals And D. (iv) State how antidiuretic hormone (ADH) affect the amount of Urine produced by a mammal (2mks) (1mk) per day. 16. In an investigation, the appropriate composition of plasma, glomerula filtrate and urine in a mammal was determined. The results were as shown on the table. Component Urea Uric acid Glucose Amino acids Plasma proteins Salts 1.2 Plasma g/100cm³ 0.9 Quantity 0.6 of Urine 0.04 0.3 0.005 (a) Account for the absence of; (i) Plasma protein in glomerula filtrate. (ii) Glucose and amino acids in urine. 0 0.20 0.07 A 9.00 0.84 Glomerula g/100cm³ 0.04 0.005 0.20 B 0.07 0.00 0.84 Urine g/100cm³ 2.10 (b) (i) From the above results, identify two types of wastes eliminated from mammalian blood. (ii) Other than excretion, give one other function of the mammalian kidney. (c) (i) State the principal requirement of filtration that forms glomeruli filtrate. (ii) How is the requirement identified in c(i) above achieved in the kidney? 0.70 0.00 D 0.00 (3mks) (d) Describe the process of urea formation. (e) Quantity of Urine passed per day was established in five mammals A, B, C, D and E of the same species in their natural habitats. The results are shown below. 0.00 1.96 (2mks) (2mks) C E (i) Which of the five Mammals was likely to be excreting Urine very rich in ammonia? Give a reason. (2mks) (1mk) (1mk) (2mks) (2mks) (ii) Which of the five mammals was likely to be living in a desert? Give a reason. (2mks) (iii) State two structural differences expected in the nephrons of mammals And D. (iv) State how antidiuretic hormone (ADH) affect the amount of Urine produced by a mammal (2mks) (1mk) per day.

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Solution a i Plasma proteins molecules too large to pass the capillary walls of glomerula hence left ... View the full answer