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Science · 2024 · 4 marks
CBSE 2024 · Region 4 · Set 1 · Q38
Kidneys are vital organs for survival. Several factors like infections, injury or restricted blood flow to kidneys reduce the activity of kidneys.…
Kidneys are vital organs for survival. Several factors like infections, injury or restricted blood flow to kidneys reduce the activity of kidneys. This leads to accumulation of poisonous wastes in the body, which can even lead to death. In case of kidney failure, an artificial kidney can be used. An artificial kidney is a device to remove waste products from the blood through dialysis.
(a)(i)
Name the artery that brings oxygenated blood to the kidney.
(ii)
Name the cluster the thin-walled blood capillaries present in the Bowman's capsule.
(b)
In human excretory system name the organ which stores urine. Is this organ under hormonal control or nervous control ?
(c)
(i)
List two major steps involved in the formation of urine and state in brief their functions.
OR
(ii)
In which part of the nephron does selective reabsorption take place ? List the factors which the amount of water reabsorbed depends on.
Marking-scheme solution
(a) (i) Renal Artery
(ii) Glomerulus
(b) • Urinary bladder
Nervous control
(c) (i) Filtration: Nitrogenous wastes such as urea or uric acid are removed
Reabsorption: Glucose, amino acids, salts/some useful materials and major amounts of water reabsorbed
(c) (ii)Tubular part of nephron.
The amount of water absorbed depends on: -how much water is there in the body. -how much dissolved waste is there to be excreted.
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CBSE Class 10 Science past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.