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 18 of 35
- A. Thermoregulation
- B. Osmoregulation
- C. Excretion
- D. Selective reabsorption
Explanation: Osmoregulation is the process of maintaining salt and water balance (osmotic balance) across membranes within the body.Thermoregulation is…
Correct answer: Osmoregulation- A. Estrogen
- B. Epinephrine
- C. Thyroxine
- D. Vasopressin
Explanation: Option B is correct.Antidiuretic hormone (ADH), also called vasopressin, is produced by the hypothalamus and released by the posterior…
Correct answer: Vasopressin- A. Coordination
- B. Control
- C. None of these
- D. Homeostasis
Explanation: Option D is correct.Metabolism is the sum of all chemical reactions in living organisms that sustain life It include both…
Correct answer: Homeostasis- A. H2O
- B. O2
- C. CO2
- D. None of these.
Explanation: Option B is correct.The excretory product in autotrophic plants that carry out photosynthesis is oxygen.
Correct answer: O2- A. ACTH
- B. Oxytocin
- C. ADH
- D. Somatotrophin
Explanation: Option C is correct.Antidiuretic hormone (ADH), also called vasopressin, controls the formation of urine.
Correct answer: ADH- A. Homeothermic and Poikilothermic respectively
- B. Homeothermic
- C. Poikilothermic and Homeothermic respectively
- D. None of these options are correct
Explanation: Option B is correct.Homeotherms are animals that maintain a nearly constant internal body temperature, regardless of changes in the…
Correct answer: Homeothermic- A. Juxtamedullary nephrons
- B. Cortical nephrons
- C. Internal nephrons
- D. Outer nephrons
Explanation: Option A is correct.Juxtamedullary nephrons are nephrons that are located at the border of the cortex and medulla of the kidney.
Correct answer: Juxtamedullary nephrons- A. Antidiuretic Hormone
- B. Aldosterone
- C. Thyroxine
- D. Cortisol
Explanation: Option A is correct.Diabetes insipidus is a condition characterized by the deficiency or dysfunction of antidiuretic hormone (ADH), also…
Correct answer: Antidiuretic Hormone- A. Receptors, control centre and effectors
- B. Sensory, motor and associative neurons
- C. CNS, PNS and diffused nervous system
- D. Cerebrum, cerebellum and pons
Explanation: Option A is correct.The three components of the mechanism of homeostatic regulation are:Receptors:These are specialized cells or…
Correct answer: Receptors, control centre and effectors- A. Bowman's capsule
- B. Ascending arm
- C. Distal and collecting ducts
- D. Descending arm
Explanation: Option C is correct.ADH (antidiuretic hormone), also known as vasopressin, regulates water balance in the body by controlling the…
Correct answer: Distal and collecting ducts- A. Proximal tubule
- B. Distal tubule
- C. Bowman's capsule
- D. Glomerulus
Explanation: Option A is correct.Reabsorption mostly takes place in the proximal tube of nephron.
Correct answer: Proximal tubule- A. Glomerulus and Bowman's Capsule
- B. Proximal and distal convoluted tubules
- C. Ascending and descending limbs of the loop of Henle
- D. Collecting duct
Explanation: Option A is correct.The correct answer is the Glomerulus and Bowman's Capsule.
Correct answer: Glomerulus and Bowman's Capsule- A. Amino acids
- B. Salt
- C. Ammonia
- D. Water
Explanation: Option D is correct.Antidiuretic hormone (ADH) is produced by the hypothalamus and released by the posterior pituitary gland.
Correct answer: Water- A. K+
- B. Cl-
- C. Ca++
- D. Na+
Explanation: Option D is correct.The active uptake of sodium (Na+) in the ascending limb or thick loop of Henle is promoted by the action of…
Correct answer: Na+- A. Behavior of organisms
- B. Adaptation
- C. Thermoregulation
- D. Homeostasis
Explanation: Option D is correct.Homeostasis refers to the process by which the body maintains a stable internal environment despite fluctuations in…
Correct answer: Homeostasis- A. Proximal tubule
- B. Descending loop of Henle
- C. Ascending loop of Henle
- D. Collecting ducts
Explanation: Option C is correct.Primary site of reabsorption of sodium ions in the nephron is the ascending loop of Henle.
Correct answer: Ascending loop of Henle- A. Homeostasis
- B. Osmoregulation
- C. Thermoregulation
- D. Excretion
Explanation: Option B is correct.•Osmoregulation is a process that regulates the osmotic pressure of fluids and electrolyte balance in organisms.
Correct answer: Osmoregulation- A. Birds
- B. Amphibians
- C. Fishes
- D. Both A and C
Explanation: Option A is correct.Endotherms are animals that are dependent on or capable of the internal generation of heat.
Correct answer: Birds- A. Afferent arterioles
- B. Afferent capillaries
- C. Efferent arterioles
- D. Efferent capillaries
Explanation: Option C is correct.Blood leaves the Bowman's capsule by Efferent arterioles.The Bowman's capsule is a crucial component of the nephron…
Correct answer: Efferent arterioles- A. Kidney failure stage
- B. Hyperoxaluria
- C. Uremia
- D. Hypercalcemia
Explanation: Option C is correct.Uremia is the term for high levels of urea in the blood.
Correct answer: Uremia