Class 12 Biology · Chapter 2 · Test 2
Urine Formation
44 MCQs
44 questions · 35 min · 44 marks
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Sample questions
The first 5 of 44. Try each one, then tap to see the answer.
Question 1
In a healthy person, glucose is present in blood but not in urine. This is because glucose molecules are:
- AReabsorbed from the proximal convoluted tubule to blood
- BOxidised in kidneys
- CStored in kidneys
- DToo large to enter Bowman's capsule
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Answer: A
Glucose is filtered but then actively reabsorbed in the proximal convoluted tubule.
Question 2
The sizes of molecules present in Bowman's capsule are smaller than the sizes of molecules present in:
- AAfferent renal arteriole
- BCollecting duct
- CLoop of Henle
- DProximal tubule
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Answer: A
Blood in the afferent arteriole still has proteins and cells that cannot enter the capsule.
Question 3
If a drug reduces mitochondrial activity in nephrons, which chemical will be present in increased amounts in the urine?
- AAmmonia
- BGlucose
- CUric acid
- DUrea
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Answer: B
Reduced ATP impairs active transport so glucose is not reabsorbed and appears in urine.
Question 4
The water content of blood is regulated by ADH. In which part of the nephron does this regulation occur?
- ABowman's capsule
- BProximal convoluted tubule
- CLoop of Henle
- DCollecting duct
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Answer: D
ADH acts on the walls of the collecting ducts.
Question 5
In kidneys glucose is reabsorbed into blood. Where does this reabsorption occur?
- ABowman's capsule
- BGlomerulus
- CProximal convoluted tubule
- DCollecting duct
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Answer: C
Most reabsorption including that of glucose occurs in the proximal convoluted tubule.
More tests in Human Urinary System
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