Biology
Give two examples of the following:
(i) Nitrogenous waste
(ii) Bile pigments
(iii) Main excretory organs
(iv) Accessory excretory organs
(v) Water-soluble vitamins
Excretory System
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Answer
(i) Urea, Uric acid
(ii) Bilirubin, Biliverdin
(iii) Kidney, Urinary bladder
(iv) Skin, Lungs
(v) Vitamin B, Vitamin C
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Given below is a list of substances — select the ones that need to be eliminated from the body.
Glucose, excess water, amino acids, urea, carbon dioxide, excess common salt, glycogen, uric acid
Name the following :
(i) The tube arising from the notch of the kidney on the median side and connecting behind with the urinary bladder.
(ii) The tube that passes the urine to the outside of the body.
(iii) The inner lighter coloured region of the kidney.
(iv) Knot-like mass of blood capillary inside Bowman's capsule.
(v) The structural and functional unit of the kidney.
(vi) The blood vessel which :
- enters malpighian capsule
- leaves malpighian capsule
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.
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) The blood flowing through the renal artery is oxygenated and contains a lot of nitrogenous waste.
(v) The blood flowing through the renal vein is oxygenated and normally does not contain nitrogenous waste.
(vi) Excessive uric acid may produce kidney stones.