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 24 of 35
- A. Active Immunity
- B. Inoculation
- C. Passive Immunity
- D. Antibodies
Explanation: In contrast to active immunity, in which case antigens are introduced to stimulate the production of antibodies, by artificial or natural…
Correct answer: Passive Immunity- A. Evaporative Cooling
- B. Shivering Thermogenesis
- C. Non-shivering Thermogenesis
- D. Thermoregulation
Explanation: The process mentioned in 'A', 'B' and 'C' are partially supportive in temperature maintenance, however thermoregulation is the homeostatic…
Correct answer: Thermoregulation- A. Internal environment
- B. External environment
- C. Intracellular environment
- D. Intercellular environment
Explanation: Homeostatic arrangements in each organism have acquired perfection through evolution and now each species have its own arrangement.
Correct answer: Internal environment- A. 10
- B. 20
- C. 1
- D. 0.1
Explanation: Kidneys contribute less than 1% of the total body weight but they receive 20% of the total blood of the body by each cardiac beat.
Correct answer: 1- A. 1
- B. 10
- C. 5
- D. 20
Explanation: Kidney contribute less than 1% of the total body weight but they receive 20% of the total blood of the body by each cardiac beat.
Correct answer: 20- A. An inner cortex and outer medulla
- B. An outer cortex and an inner medulla
- C. An inner cortex and an inner medulla
- D. An outer cortex and a middle medulla
Explanation: Cortex literally means outer layer and medulla literally means inner part.
Correct answer: An outer cortex and an inner medulla- A. Cortical Nephron
- B. Juxtamedullary Nephron
- C. Counter Current Multiplier
- D. Restricted Supply of Water
Explanation: Though counter current multiplier and restricted supply of water are also associated with production of concentrated urine but they are…
Correct answer: Juxtamedullary Nephron- A. Cortical
- B. Juxtamedullary
- C. Juxtacortical nephron
- D. Medullary
Explanation: Cortex is the outer and peripheral part of kidneys whereas medulla is the inner or central part of kidney.
Correct answer: Cortical- A. Glomerulus
- B. Bowman's Capsule
- C. Renal Pyramid
- D. Renal Hilus
Explanation: Bowman's capsule, also known as the Bowman capsule or glomerular capsule, is a cup-like sac at the beginning of the tubular component of a…
Correct answer: Bowman's Capsule- A. Bowman's Capsule
- B. Glomerulus
- C. Loop of Henle
- D. Renal Pelvis
Explanation: The ball of capillaries is called the glomerulus, which is surrounded by a cup-shaped structure called Bowman's capsule.
Correct answer: Bowman's Capsule- A. Afferent Arteriole
- B. Peritubular Capillaries
- C. Efferent Arteriole
- D. Glomerulus
Explanation: The ball of capillaries is called glomemlus which is surrounded by a cup shaped structure called Bowman's capsule.
Correct answer: Glomerulus- A. Osmotic Pressure
- B. Blood Pressure
- C. Interstitial Pressure
- D. Diffusion Pressure
Explanation: The net filtration pressure (NFP) at the glomemlus is the difference between the net hydrostatic pressure and the blood colloid osmotic…
Correct answer: Blood Pressure- A. Vasa Recta
- B. Afferent Arteriole
- C. Peritubular Capillaries
- D. Renal Vein
Explanation: Peritubular capillaries constitute a network of tiny blood vessels that travel alongside nephrons, allowing reabsorption and secretion…
Correct answer: Peritubular Capillaries- A. Proximal Tubule
- B. Distal Tubule
- C. Loop of Henle
- D. Urine Collecting Duct
Explanation: Proximal tubule receives filtrate from Bowman's capsule.
Correct answer: Proximal Tubule- A. Renal Pelvis
- B. Distal Tubule
- C. Proximal Tubule
- D. Loop of Henle
Explanation: Distal tube opens into collecting tubule.
Correct answer: Distal Tubule- A. Peritubular Network
- B. Glomerulus
- C. Afferent Arteriole
- D. Efferent Arteriole
Explanation: Glomemlar membrane is used as initial filtering membrane.
Correct answer: Glomerulus- A. Glucose, Amino acids, Urea
- B. Glucose, Uric acid, Salts
- C. Glucose, Amino acids, Salts
- D. Urea, Uric acid, Ammonia
Explanation: These useful substances are filtered out in aqueous solution along with waste substances from glomemlus into the Bowman's capsule.
Correct answer: Glucose, Amino acids, Salts- A. Distal Tubule
- B. Loop of Henle
- C. Proximal Tubule
- D. Collecting Tubule
Explanation: All useful constituents of the glomemlar filtrate are reabsorbed in the proximal tubules and when filtrate leaves proximal tubules, it…
Correct answer: Proximal Tubule- A. Hydrogen Ions
- B. Hydroxyl Ions
- C. Potassium Ions
- D. Sodium Ions
Explanation: Hydrogen ions make pH acidic to give the urine an antiseptic effect.
Correct answer: Hydrogen Ions- A. Surplus Supply of Water
- B. Restricted Supply of Water
- C. Sufficient Supply of Water
- D. Excess Supply of Water
Explanation: When supply of water to the body is restricted the water inside the body is conserved to compensate it and vice versa.
Correct answer: Restricted Supply of Water