Question

Refer to the diagram of a nephron and answer the questions. [5 MARKS]

(a) Where does ultrafiltration occur?
(i) 1 (ii) 3 (iii) 2 (iv) 5

(b) Where is most of the water reabsorbed into the blood stream?
(i) 4 (ii) 5 (iii) 3 (iv) 7

(c) Where is most of the glucose reabsorbed?
(i) 4 (ii) 5 (iii) 6 (iv) 7

(d) Which structure helps to concentrate urine and is very long in desert mammals such as the kangaroo rat?
(i) 1 (ii) 2 (iii) 5 (iv) 6

(e) Which structure contains urine?
(i) 4 (ii) 5 (iii) 6 (iv) 7

Answer 1

Each Part: 1 Mark

(a) (iii) Ultrafiltration occurs in the glomerulus.
(b) (i) Most of the water is reabsorbed into the blood stream in the proximal convoluted tubule.
(c) (i) Most of the glucose is reabsorbed in the proximal convoluted tubule.
(d) (iv) The loop of Henle helps to concentrate urine and is very long in desert mammals such as the kangaroo rat.
(e) (iv) Collecting duct contains urine.