A Deep Dive into Homeostasis and Biological Harmony MCQS
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Test o.2 Homeostasis Mcqs with answers and explanation
Q21. Stone of Uric Acid:
(A) Adrenal Cortex (B) 15% (C) Kidney Machine (D) 10%
Answer: (A) Adrenal Cortex
Explanation: The formation of stones of uric acid is not directly associated with the options provided. However, the adrenal cortex is primarily involved in the production of hormones, not the formation of uric acid stones.
Q22. Structural adaptation:
(A) Presence of the sweat gland; (B) Liver; (C) Kidney Machine; (D) Adrenal Cortex
Answer: (A) Presence of sweat glands
Explanation: Structural adaptations are physical features of an organism that enhance its survival in a specific environment. The presence of sweat glands is an example of a structural adaptation related to temperature regulation.
Q23. Aldosterone:
(A) Presence of a sweat gland; (B) Adrenal Cortex; (C) Liver; (D) Kidney Machine
Answer: (B) Adrenal Cortex
Explanation: Aldosterone is a hormone produced by the adrenal cortex. It plays a crucial role in the regulation of electrolytes and water balance in the body.
Q24. Nephron:
(A) Passive loss of water from gills; (B) Kidney; (C) Large amounts of hypotonic fluid contain little salt; (D) Body fluid isotonic to the external environment.
Answer: (B) Kidney
Explanation: The nephron is the functional unit of the kidney responsible for filtration, reabsorption, and secretion in the formation of urine.
Q25. Freshwater fish:
(A) body fluid isotonic to the external environment; (B) passive loss of water from the gills; (C) large amounts of hypotonic fluid contain little salt; (D) kidney
Answer: (C) A large amount of hypotonic contains little salt.
Explanation: Freshwater fish live in a hypotonic environment, and their bodies contain a large amount of water with a low salt concentration. They actively pump ions out through their gills.
Q26. Bile:
(A) Liver; (B) Body fluid isotonic to the external environment; (C) Kidney; (D) Large amounts of hypotonic contain little salt.
Answer: (A) Liver
Explanation: Bile is produced by the liver and is stored in the gallbladder. It is released into the small intestine to aid in the digestion and absorption of fats.
Q27. Osmoconformers:
(A) body fluid isotonic to the external environment; (B) passive loss of water from gills; (C) large amounts of hypotonic fluid contain little salt; (D) kidney
Answer: (A) Body fluid is isotonic to the external environment.
Explanation: Osmoconformers maintain their body fluid isotonic to the external environment, meaning the concentrations of solutes inside their bodies are similar to those in their surroundings.
Q28. Thermoreceptors:
(A) Cockroach (B) Hypothalamus (C) Loop of Henle (D) Bowman Capsule
Answer: (B) Hypothalamus
Explanation: Thermoreceptors are sensory receptors that detect changes in temperature. In mammals, the hypothalamus is a key region that regulates body temperature.
Q29. Uric Acid:
(A) Cockroach (B) Loop of Henle (C) Bowman Capsule (D) Hypothalamus
Answer: (A) Cockroach
Explanation: Uric acid is a nitrogenous waste product excreted by insects like cockroaches.
Q30. Lithotripsy:
(A) Cockroach (B) Hypothalamus (C) Loop of Henle (D) Non-Surgical Removal of Gall Bladder Stone
Answer: (D) Non-surgical removal of gall bladder stone
Explanation: Lithotripsy is a medical procedure used to break down stones in the gallbladder or urinary tract without surgery.
Q31. Posterior Lobe:
(A) Active Transport (B) Sensor (C) Passive Transport (D) Antidiuretic Hormone
Answer: (D) Antidiuretic hormone
Explanation: The posterior lobe of the pituitary gland releases hormones such as antidiuretic hormone (ADH) that regulate water balance in the body.
Q32. Ascending loop of Henle:
(A) Passive Transport; (B) Active Transport of Na+ (C) Sensor; (D) Native to a cold region
Answer: (B) Active Transport of Na+
Explanation: The ascending loop of Henle is involved in the active transport of sodium ions.
Q33. Oak:
(A) Passive Transport (B) Active Transport (C) Sensor (D) Native to the Cold Region
Answer: (D) Native to a cold region
Explanation: Oak trees are often native to cold regions and have adaptations to survive in such environments.
Q34. Receptors:
(A) Sensor; (B) Native to the cold region; (C) Antidiuretic Hormone; (D) Passive Transport
Answer: (A) Sensor
Explanation: Receptors are sensors that detect changes in the internal or external environment.
Q35. Homeostasis is the process of maintaining a constant environment despite conditions:
(A) External Internal (B) Internal External (C) Both (A) and (B) (D) None of these
Answer: (C) Both (A) and (B)
Explanation: Homeostasis involves maintaining a constant internal environment despite changes in external and internal conditions.
Q36. Homeostasis is based on: (A) thermoregulation only; (B) catabolism; (C) feedback mechanisms; (D) anabolism.
Answer: (C) Feedback mechanism
Explanation: Homeostasis relies on feedback mechanisms to regulate and maintain a stable internal environment.
Q37. Two major control centers for homeostasis are:
(A) Exocrine and endocrine glands (B) apocrine and heterocrine glands; (C) receptors and effectors; (D) brain and endocrine glands
Answer: (D) Brain and endocrine glands
Explanation: The brain and endocrine glands, particularly the hypothalamus, play key roles in coordinating homeostatic responses.
Q38. Which of the following activities is regulated by homeostasis? (A) Temperature; (B) Water Balance; (C) Blood Sugar Level; (D) All of the above
Answer: (D) All of the above
Explanation: Homeostasis regulates various activities, including temperature, water balance, and blood sugar level.
Q39. What should be the regulator in this chart?
(A) Medullaoblongata;a (B) Pituitary Gland; (C) Spinal Cord; (D) Hypothalamus
Answer: (D) Hypothalamus
Explanation: The hypothalamus is a key regulator of homeostasis, coordinating responses to maintain a stable internal environment.
Q40. What are the components of a feedback mechanism?
(A) Receptors, Insulators, and Effectors(B) Receptors, suppressors, and effectors (C) Receptors, regulators, and effectors (D) Receptors, depressors, and effectors
Answer: (C) Receptors, regulators, and effectors
Explanation: The components of a feedback mechanism include receptors that detect changes, regulators that process information, and effectors that produce responses to maintain homeostasis.
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