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 15 of 35
- A. 1-2 liters
- B. 1-3 liters
- C. 1-4 liters
- D. 1-5 liters
Explanation: 1-2 litres is the most common range for daily urine output in adults. It represents a normal level of urinary excretion for maintaining…
Correct answer: 1-2 liters- A. Ureter
- B. Hilus
- C. Pelvis
- D. Urethra
Explanation: The urethra is the tubular structure that carries urine from the bladder to the outside of the body during urination.
Correct answer: Urethra- A. Bowman's capsule
- B. Proximal convoluted tube
- C. Henle's loop
- D. Distal convoluted tube
Explanation: Ultrafiltration occurs in Bowman's capsule, which is the initial segment of the nephron in the kidney.
Correct answer: Bowman's capsule- A. Juxta-medullary nephrons
- B. Cortical nephrons
- C. Capillaries of glomerulus
- D. Both (A) and (B)
Explanation: Juxta-medullary nephrons are responsible for establishing the concentration gradient in the kidney medulla, which is important for water…
Correct answer: Juxta-medullary nephrons- A. Peritonium
- B. Peritreme
- C. Perizonium
- D. All (A), (B) and (C)
Explanation: Perizonium is the correct answer. Perizonium is a thin membranous covering that surrounds each kidney, providing support and protection.
Correct answer: Perizonium- A. 4.8 - 7.4
- B. 3.5 - 6.00
- C. 2.5 - 5.00
- D. 8.00
Explanation: 4.8 - 7.4 is the typical pH of human urine under normal conditions. It's slightly acidic to neutral.
Correct answer: 4.8 - 7.4- A. Aldosterone
- B. Parathormone
- C. Anti-diuretic
- D. Vasopressin
Explanation: Parathormone is produced by the parathyroid glands and is responsible for regulating calcium levels in the blood.
Correct answer: Parathormone- A. Tubular reabsorption
- B. Tubular secretion
- C. Counter-current exchange
- D. None of these
Explanation: Tubular secretion is the opposite process of reabsorption, where substances are actively transported from the blood into the renal tubules…
Correct answer: Tubular secretion- A. Ornithine cycle
- B. Citrulline cycle
- C. Arginine cycle
- D. All of these
Explanation: Ornithine cycle is the correct term for the urea cycle. Ornithine, a non-protein amino acid, is used as a carrier molecule in this cycle.
Correct answer: Ornithine cycle- A. "A" Urea "B" ammonia "C" uric acids
- B. "A" uric acid "B" ammonia "C" urea
- C. "A" Ammonia "B" urea "C" uric acid
- D. "A" Ammonia "B" uric acid "C" urea
Explanation: A is ammonia. B is Urea and C is uric acid. So, this option is correct.
Correct answer: "A" Ammonia "B" urea "C" uric acid- A. Afferent arteriole
- B. Renal artery
- C. Efferent arteriole
- D. Renal vein
Explanation: The renal artery is the blood vessel that carries oxygenated blood from the aorta to the kidney.
Correct answer: Renal artery- A. Bowman capsule
- B. Proximal convoluted tube
- C. Glomerulus
- D. Loop of Henle
Explanation: The glomerulus is a network of capillaries located within the Bowman's capsule.
Correct answer: Glomerulus- A. Evaporation
- B. Radiation
- C. Convection
- D. All (A), (B) and (C)
Explanation: In both ectotherms and endotherms, heat can be lost through evaporation, radiation, and convection.Both ectotherms and endotherms can lose…
Correct answer: All (A), (B) and (C)- A. 5%
- B. 20%
- C. 70%
- D. 90%
Explanation: The incidence of calcium oxalate type stones are 70% of all the kidney stones.
Correct answer: 70%- A. 10%
- B. 20%
- C. 70%
- D. 90%
Explanation: The incidence of calcium oxalate type stones are 70% of all the kidney stones.
Correct answer: 10%- A. An artificial kidney
- B. Filtering it within abdomen
- C. Removing glucose from blood
- D. Both (A) and (B)
Explanation: The option "both A and B" encompasses both methods of dialysis: hemodialysis (with an artificial kidney) and peritoneal dialysis…
Correct answer: Both (A) and (B)297. Haemodialysis means:
- A. Removing the blood
- B. Cleaning the blood
- C. Diluting the blood
- D. All options are correct
Explanation: Hemodialysis means 'cleaning the blood'. In this procedure, blood is circulated through a machine which contains a dialyzer also called an…
Correct answer: Cleaning the blood- A. Endotherms
- B. Heterotherms
- C. Ectotherms
- D. Both (B) and (C)
Explanation: Ectotherm is the other type, which produce metabolic heat at low level and that is also exchanged quickly with the environment, however…
Correct answer: Ectotherms- A. Ectotherms
- B. Poikilotherms
- C. Hetrotherms
- D. None of these
Explanation: A third category, heterotherms is of those animals who are capable of varying degrees of endothermic heat production but generally do not…
Correct answer: Hetrotherms- A. Lithography
- B. Linography
- C. Lithotripsy
- D. All options are correct
Explanation: Lithotripsy is the correct term for the medical procedure of breaking stones inside the urinary tract.
Correct answer: Lithotripsy