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 33 of 35
- A. Homeostasis
- B. Natural health
- C. Strucutral adaptation
- D. Osmoregulation
Explanation: Homeostasis is the tendency of an organism or cell to regulate its internal conditions, such as the chemical composition of its body…
Correct answer: Homeostasis- A. Hormones
- B. Osmosis
- C. Homeostasis
- D. Ecology
Explanation: This is a standard answer. The maintenance of a stable/constant internal environment is called homeostasis.
Correct answer: Homeostasis- A. Thalamus
- B. Hypothalamus
- C. Pones
- D. Cerebellum
Explanation: Our internal body temperature is regulated by a part of our brain called the hypothalamus.
Correct answer: Hypothalamus- A. Kidneys
- B. Brain
- C. Lungs
- D. Liver
Explanation: The body's temperature control center is the hypothalamus which itself is part of the brain.
Correct answer: Brain645. Humans regulate their internal body temperature within a very narrow range. This is an example of?
- A. Homeostasis
- B. Evolution
- C. Genetics
- D. Metabolism
Explanation: Homeostasis refers to the body's ability to maintain a stable and balanced internal environment, despite external changes.
Correct answer: Homeostasis- A. Creatinine
- B. Bilirubin
- C. Hypoxanthin
- D. Xanthin
Explanation: Bilirubin is the end product of haemoglobin breakdown. When haemoglobin from old red blood cells is broken down, bilirubin is formed as a…
Correct answer: Bilirubin- A. 500 ml
- B. 300 litre.
- C. 5 litre.
- D. 500 litre.
Explanation: 1kg of ammonia to be excreted in the form of Ammonia requires 500 liters of waterUrea requires 50 liters of waterUric acid requires 1…
Correct answer: 500 litre.- A. 20
- B. 30
- C. 25
- D. 50
Explanation: Since only 1 ml of water is required to eliminate 1 g of nitrogen in the form of uric acid, then 50 g of nitrogen will be eliminated by 50…
Correct answer: 50- A. Planaria.
- B. Cockroach.
- C. Hydra.
- D. Earthworm.
Explanation: Earthworms are Annelids possessing complex metanephridia.
Correct answer: Earthworm.- A. Uric acid
- B. Creatine
- C. Urea
- D. Creatinine
Explanation: Option [a] Uric acid is the chemical created when the body breaks down substances called purines, nucleic acid contains purines, adenine…
Correct answer: Uric acid- A. Urea
- B. Ammonia
- C. Salts
- D. Uric acid
Explanation: Urea is the main nitrogenous waste product in humans, that is produced in the liver after deamination of amino acids.
Correct answer: Urea- A. Thermoregulation
- B. Osmoregulation
- C. Kidney Failure
- D. Excretion
Explanation: Excretion is the process why which metabolic waste is removed from our body its includes the removal of waste through kidney,skin or…
Correct answer: Excretion- A. CO2
- B. Uric Acid
- C. Urea
- D. Ammonia
Explanation: The table above shows that ammonia requires the highest percentage of water for excretion, which shows that ammonia contains the highest…
Correct answer: Ammonia- A. Ureter
- B. Urethra
- C. Pelvis
- D. Urinary Bladder
Explanation: Explanation:The central cavity of the kidney is known as the renal pelvis.
Correct answer: Pelvis- A. Transport of water
- B. Uptake of sodium in loop of Henle
- C. Transport of K* ions inta kidney
- D. Reabsorption of water
Explanation: Explanation:Aldosterone is a hormone that is involved in osmoregulation and blood pressure regulation.
Correct answer: Uptake of sodium in loop of Henle- A. Ultrasound
- B. Dialysis
- C. Lithotripsy
- D. X-ray
Explanation: Explanation:Lithotripsy means breaking stones. It is a non-invasive procedure.
Correct answer: Lithotripsy- A. Striated muscles
- B. Smooth muscles
- C. Sphincter muscles
- D. Circular muscles
Explanation: Option[a] Striated muscles are either skeletal muscles or cardiac muscles not in the urinary bladder.Option[b] Smooth muscles are present…
Correct answer: Sphincter muscles- A. Proximal Tubule
- B. Distal Tubule
- C. Collecting Duct
- D. Loop of Henle
Explanation: The interstitial fluid of kidney is gradually concentrated from cortical to medullary part ,thus inner medulla is highly concentrated with…
Correct answer: Loop of Henle- A. Proximal Tubule
- B. Distal Tubule
- C. Collecting Duct
- D. Loop of Henle
Explanation: Antidieuretic hormone causes vesicles, which act as aquaporins, to fuse into the membranes of the collecting duct, allowing more water to…
Correct answer: Collecting Duct- A. Liver
- B. Abdomen
- C. Kidney
- D. Pancreas
Explanation: Peritoneal indicates that it involves the abdominal cavity, thus dialysis fluid is introduced into the abdomen during peritoneal cavity.
Correct answer: Abdomen