2nd Year MCQs Biology
Chapter No. 1 Homeostasis
Q.41 It is adapted to conserve water by over 99.5% reabsorption of glomerular filtrate:
A) Mammalian body including human
B) Mammalian kidney including human
C) Mammalian skin including human
D) Mammalian liver including human
Answer:
B) Mammalian kidney including humans
Answer:
Answer is “Mammalian kidney including humans”
Explanation:
More than 99.5% water from filtrate is reabsorbed in human and mammalian kidney.
Q.42 The active uptake of sodium from the ascending limb or thick loop of Henle is promoted by the action of:
A) ADH
B) Aldosterone
C) Concentration of filtrate
D) Vasopressin
Answer:
B) Aldosterone
Answer:
Answer is “Aldosterone”.
Explanation:
Aldosterone hormone is secreted from adrenal cortex and acts upon ascending limb of loop of Henle to promote reabsorption of sodium by active uptake. It is mineralocorticoid hormone.
Q.43 The production of varied concentration of urine depends upon the:
A) Availability of water
B) Availability of sodium
C) Production of aldosterone
D) Counter current multiplier
Answer:
A) Availability of water
Answer:
Answer is “Availability of water”.
Explanation:
When sufficient water is available diluted urine is produced and when water is deficient urine is concentrated.
Q.44 Kidney stones are formed in:
A) Infectious diseases
B) Metabolic diseases
C) Genetic disease
D) Congenital diseases
Answer:
B) Metabolic diseases
Answer:
Answer is “Metabolic diseases”
Explanation:
Metabolic diseases result in formation of kidney stones.
Q.45 Calcium oxalate type stone is caused by:
A) Hyperoxaluria
B) Hypercalcaemia
C) Hyperuricemia
D) Metabolic disease
Answer:
A) Hyperoxaluria
Answer:
Answer is “Hyperoxaluria”.
Explanation:
It is high level of oxalates in blood which cause calcium oxalate type stones.
Q.46 The kidney stones caused by hypercalcaemia are ________ percent of the total kidney stones.
A) 10%
B) 15%
C) 70%
D) 5%
Answer:
B) 15%
Answer:
Answer is “15%”.
Explanation:
As per statistical data given in textbook.
Q.47 The kidney stones caused by hyperoxaluria are ________ percent of the all kidney stones.
A) 10%
B) 15%
C) 70%
D) 5%
Answer:
C) 70%
Answer:
Answer is “70%”.
Explanation:
As per statistical data given in textbook.
Q.48 The kidney stones caused by hyperuricemia are ______ percent of the all kidney stones.
A) 10%
B) 15%
C) 70%
D) 5%
Answer:
A) 10%
Answer:
Answer is “10%”.
Explanation:
As per statistical data given in textbook.
Q.49 Hypercalcaemia i.e. high level of circulating calcium in blood is because of:
A) Stone of calcium phosphate
B) Stone of calcium oxalate
C) Stone of uric acid
D) Other diseases
Answer:
D) Other diseases
Answer:
Answer is “Other diseases”.
Explanation:
Hypercalcemia is caused by some metabolic, dietary or hormonal disorder.
Q.50 The salts are precipitated out during ____ and accumulate later to form stone.
A) Urea formation
B) Urination
C) Urine formation
D) Defecation
Answer:
C) Urine formation
Answer:
Answer is “Urine formation”.
Explanation:
Stone formation occur during urine formation.
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