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 12 of 35
221. Fresh water fish:
- A. Body fluid isotonic to external environment
- B. Passive loss of water from gills
- C. Large amount of hypotonic urine contain little salt
- D. Kidney
Explanation: Fresh water animals are constantly facing the osmotic flooding of body fluids and loss of salts.
Correct answer: Large amount of hypotonic urine contain little salt222. Osmoconformers:
- A. Body fluid isotonic to external environment
- B. Passive loss of water from gills
- C. Large amount of hypotonic urine contain little salt
- D. Kidney
Explanation: Animal body fluids are kept isotonic to the external environment, even for marine saltwater environment.
Correct answer: Body fluid isotonic to external environment223. Thermoreceptors:
- A. Cockroach
- B. Hypothalamus
- C. Loop of Henle
- D. Bowman capsule
Explanation: Small region in the brain controlling essential functions like temperature, hunger, thirst, and hormone release.
Correct answer: Hypothalamus224. Uric acid:
- A. Cockroach
- B. Loop of Henle
- C. Bowman capsule
- D. Hypothalamus
Explanation: A cockroach is an insect with a flattened body, antennae, and hard exoskeleton. Found worldwide, often in dark, damp environments.
Correct answer: Cockroach225. Lithotripsy:
- A. Cockroach
- B. Hypothalamus
- C. Loop of Henle
- D. Non-surgical removal of gall bladder stone
Explanation: Lithotripsy is non-surgical removal of gall bladder stone.
Correct answer: Non-surgical removal of gall bladder stone226. Posterior lobe:
- A. Active transport
- B. Sensor
- C. Passive transport
- D. Anti-diuretic hormone
Explanation: Anti-diuretic hormone (ADH), also known as vasopressin, is a hormone produced by the hypothalamus and released by the pituitary gland.
Correct answer: Anti-diuretic hormone- A. Passive transport
- B. Active transport of Na+ions
- C. Sensor
- D. Native to cold region
Explanation: Active transport of Na+ ions is a cellular process that requires energy, typically in the form of ATP.
Correct answer: Active transport of Na+ions228. Receptors:
- A. Sensor
- B. Native to cold region
- C. Antidiuretic Hormone
- D. Passive transport
Explanation: A sensor is a device that detects and measures physical properties or changes in the environment and converts this information into…
Correct answer: Sensor- A. External internal
- B. Internal external
- C. Both (A) and (B)
- D. None of these
Explanation: The protection of internal environment from the harms of fluctuations in external environment is termed as homeostasis.
Correct answer: Internal external- A. Thermoregulation
- B. Catabolism
- C. Feedback mechanism
- D. Anabolism
Explanation: A feedback mechanism is a regulatory process in which the output of a system influences its own operation.
Correct answer: Feedback mechanism- A. Exocrine and endocrine glands
- B. Apocrine and Heterocrine glands
- C. Receptors and effectors
- D. Brain and endocrine glands
Explanation: The body temperature regulation in humans is based on complex homeostatic systems facilitated by feedback mechanisms.
Correct answer: Brain and endocrine glands- A. Temperature
- B. Water balance
- C. Blood sugar level
- D. All (A), (B) and (C)
Explanation: The control systems have been acquired for the variety of homeostatic regulations.
Correct answer: All (A), (B) and (C)- A. Medulla oblangata
- B. Pituitary gland
- C. Spinal cord
- D. Hypothalamus
Explanation: The hypothalamus is a small region in the brain that plays a key role in maintaining homeostasis by regulating various bodily functions…
Correct answer: Hypothalamus- A. Receptors, insulators, effectors
- B. Receptors, suppressors, effectors
- C. Receptors, regulators, effectors
- D. Receptors, depressors, effectors
Explanation: Feedback mechanism consist of receptors, regulators ad effectors.
Correct answer: Receptors, regulators, effectors- A. Isotonic to cell
- B. Hypertonic to cell
- C. Hypotonic to cell
- D. None of these
Explanation: Hypotonic refers to a solution with a lower concentration of solutes compared to another solution.
Correct answer: Hypotonic to cell- A. No net movement of water
- B. Net movement of water into the cell
- C. Net movement of water out of the cell
- D. Bursting of the cell
Explanation: Animal body fluids are kept isotonic to the external environment, even for marine saltwater environment.
Correct answer: No net movement of water- A. Isotonic to the cell
- B. Hypotonic to the cell
- C. Hypertonic to cell
- D. None of these
Explanation: Hypertonic refers to a solution with a higher concentration of solutes compared to another solution.
Correct answer: Hypertonic to cell- A. Flow of solvent through semi-permeable membrane from higher to less concentrated solution
- B. Flow of solvent through semi-permeable membrane from less to higher concentrated solution
- C. Flow of a solute from a semi-permeable membrane
- D. Flow of water without membrane
Explanation: Osmosis is the movement of a solvent, typically water, across a semi-permeable membrane from a region of lower solute concentration to a…
Correct answer: Flow of solvent through semi-permeable membrane from less to higher concentrated solution- A. In an isotonic solution
- B. In a hypertonic solution
- C. In a hypotonic solution
- D. None of the above
Explanation: Hypertonic refers to a solution with a higher concentration of solutes compared to another solution.
Correct answer: In a hypertonic solution- A. Undergo cytolysis
- B. Undergo plasmolysis
- C. Be at equilibrium
- D. Its turgor pressure decreases
Explanation: When an animal cell is placed in a hypotonic environment, it will undergo cytolysis.
Correct answer: Undergo cytolysis