Q1 of 48 Page 104

Excretion primarily involves

Excretion is the removal of all harmful and unwanted substances from the body. This doesn’t necessarily include just undigested and unabsorbed food. Also, excretion involves all the activities that are taking place at the cellular level. The undigested food is not directly affecting the cellular metabolism.

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2

Given is a jumbled list of the parts of a certain body structure - Loop of Henle, Bowman’s capsule, distal convoluted tubule, glomerulus, proximal convoluted tubule.

(i) Name the structure to which the listed parts belong.


(ii) Rearrange the parts in their proper sequence from the starting point to where they end.

 1

State if the following statements are true or false.

(i) The blood flows through glomerulus under great pressure.


(ii) Glomerular filtrate consists of many substances such as water, salts, glucose and white blood corpuscles.


(iii) Sodium chloride contained in glomerular filtrate is fully reabsorbed in the renal tubule.


(iv) Besides the normal constituents, the urine may pass out excess vitamins but not the antibiotics.


(v) Excessive uric acid and urine may produce kidney stones.

 2

Maximum amount of water from the glomerular filtrate is reabsorbed in

 3

Which one of the following in real sense is NOT an excretory activity?