Homeostasis MCQs for MDCAT Practice

Biology section, Homeostasis chapter. Sample questions from past PMC papers.

1. Question 1
   Which of the following is drought tolerant plant?
   • A.Wheat
   • B.Canola
   • C.Cotton
   • D.Sugarcane
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
2. Question 2
   Mammalian kidney including human is adapted to conserve water by_____________reabsorption of glomerular filtrate.
   • A.99.0%
   • B.99.1%
   • C.99.5%
   • D.Approximately 99.5%
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
3. Question 3
   ________ are animals that do not adjust their internal osmolality and are isotonic with their environment.
   • A.Osmoconformers
   • B.Osmoregulators
   • C.Thermoregulators
   • D.Thermoconformers
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
4. Question 4
   Which human peptide hormone acts directly on the collecting ducts of the nephrons to increase the reabsorption of water back into the bloodstream?
   • A.Aldosterone
   • B.Parathormone
   • C.Antidiuretic hormone
   • D.Oxytocin
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
5. Question 5
   The flame cells are the organs of excretionin
   • A.Planaria
   • B.Cockroach
   • C.Earthworm
   • D.Hydra
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
6. Question 6
   The components of feedback mechanism are ____________
   • A.Receptors, insulators, effectors
   • B.Receptors, suppressors, effectors
   • C.Receptors, depressors, effectors
   • D.Receptors, control center, effectors
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
7. Question 7
   The collecting tubule receives wastes from:
   • A.Renal Pelvis
   • B.Distal Tubule
   • C.Proximal Tubule
   • D.Loop of Henle
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.
8. Question 8
   The epidermis of the xerophytes is covered with a waxy layer called:
   • A.Cellulose
   • B.Cuticle
   • C.Chitin
   • D.Lignin
   Sign up free to see the explanation, distractor analysis, and add this to your spaced repetition deck.