Free Homeostasis MCQs with Answers
698 Homeostasis MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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Read the Homeostasis notesFree MDCAT chapter notes with key terms698 questions · page 25 of 35
481. In restricted supply of water, concentration of the filtrate is increased by the following except :
- A. Counter Current
- B. Hormonal Mechanism
- C. Antidiuretic Hormone
- D. Aldosterone
Explanation: Aldosterone is associated with active reabsorption of salts not of water.
Correct answer: Aldosterone- A. Increased
- B. Maintained
- C. Reduced
- D. Stopped
Explanation: When sufficient or excess supply of water is available to our body, reabsorption from the glomemlar filtrate will be reduced and more and…
Correct answer: Reduced- A. 99.0%
- B. 99.1%
- C. 99.5%
- D. Approx. 99.5%
Explanation: More than 99.5% water from filtrate is reabsorbed in human and mammalian kidney.
Correct answer: Approx. 99.5%- A. Interstitial Fluid
- B. Glomemlar Filtrate
- C. Blood
- D. Interstitial Fluid as well as Filtrate
Explanation: The filtrate of the kidney is gradually concentrated from the cortical to medullary part of the kidney.
Correct answer: Interstitial Fluid as well as Filtrate- A. Proximal Tubule
- B. Collecting Duct
- C. Descending loop of Henle
- D. Distal Tubule
Explanation: Water is passively reabsorbed from the filtrate back into blood stream while passing through the descending limb of loop of Henle.
Correct answer: Descending loop of Henle- A. Outflow of Sodium
- B. Outflow of Water
- C. Outflow of Salts
- D. Outflow of Any Material
Explanation: Sodium is actively reabsorbed from filtrate under the influence of aldosterone hormone while passing through the ascending limb of loop of…
Correct answer: Outflow of Water- A. Water
- B. Na+ Ions
- C. Urea
- D. H+ Ions
Explanation: Sodium is actively reabsorbed from filtrate under the influence of aldosterone hormone while passing through the ascending limb of loop of…
Correct answer: Na+ Ions- A. Increase in the plasma level of urea
- B. Decrease in other nitrogenous wastes
- C. Decrease in the plasma level of urea
- D. Decrease in the blood pressure
Explanation: When nephrons suffers from any disorder, they remain unable to filter the urea from blood and as a result of plasma level of urea increases.
Correct answer: Increase in the plasma level of urea489. The function of the kidney is completely lost, and it is unable to remove nitrogenous wastes, in :
- A. Acute renal failure
- B. Chronic renal failure
- C. Partial renal failure
- D. Kidney stones
Explanation: In chronic renal failure the kidneys will not remove the nitrogenous wastes from the blood.
Correct answer: Chronic renal failure- A. Centrifugation
- B. Lithotripsy
- C. Transfusion
- D. Dialysis
Explanation: Dialysis is a temporary measure to clean the blood off nitrogenous wastes until the kidney transplant is managed.
Correct answer: Dialysis- A. Blood Dialysis and Peritoneal Dialysis
- B. Plasma Dialysis and Peritoneal Dialysis
- C. Haemodialysis and Peritoneal Dialysis
- D. Hemodialysis and Permanent dialysis
Explanation: Hemodialysis is a pure mechanical dialysis whereas in peritoneal dialysis a human membrane called peritoneum is used as filtering membrane…
Correct answer: Haemodialysis and Peritoneal Dialysis492. Hemodialysis means:
- A. Cleaning the blood
- B. Replacing the blood
- C. Washing the blood
- D. Centrifugation of the blood
Explanation: Hemodialysis literally means cleaning the blood.
Correct answer: Cleaning the blood- A. Into the body
- B. Out of the body
- C. Into the dialysis fluid
- D. Out of the dialysis fluid
Explanation: Wastes are collected in dialysis fluid during dialysis
Correct answer: Into the dialysis fluid- A. Artery
- B. Vein
- C. Capillary
- D. Catheter
Explanation: A catheter is a thin tube made from medical grade materials, serving a broad range of functions along with filling and draining the…
Correct answer: Catheter- A. Catheter
- B. Peritoneum
- C. Dialyzer
- D. Epithelium
Explanation: As the name indicates, it is a dialysis machine.
Correct answer: Dialyzer- A. Kidney Stones
- B. Hypercalcemia
- C. Uremia
- D. Hyperoxaluria
Explanation: Uremia is an end stage kidney failure and it can be treated with kidney transplant only.
Correct answer: Uremia- A. Thermoregulation
- B. Osmoregulation
- C. Excretion
- D. Adaptions
Explanation: Adaptations gradually accumulate and become a result of evolution in long time.
Correct answer: Adaptions- A. Conservation of water-concentration of filtrate
- B. Conservation of water-diluted urine
- C. Restricted supply of water-diluted urine
- D. Sufficient supply of water-concentration of filtrate
Explanation: When water is taken back from the filtrate it becomes concentrated.
Correct answer: Conservation of water-concentration of filtrate- A. Conservation of water results in concentration of filtrate
- B. Restricted supply of water cause conservation of water
- C. Release of ADH is inhibited in the presence of hypo-osmotic body fluids
- D. Reduction in reabsorption results in production of small volume of conc. urine
Explanation: When reabsorption from filtrate is reduced, it results in production of massive volume of diluted urine.
Correct answer: Reduction in reabsorption results in production of small volume of conc. urine- A. Mammalian body including human
- B. Mammalian kidney including human
- C. Mammalian skin including human
- D. Mammalian liver including human
Explanation: More than 99.5% water from filtrate is reabsorbed in human and mammalian kidney.
Correct answer: Mammalian kidney including human