Regulation Of The Internal Environment - SS3 Biology Past Questions and Answers - page 1
What is the primary purpose of homeostasis in unicellular organisms?
To maintain a stable internal environment
To support multicellular growth
To facilitate locomotion
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Which organelle is responsible for regulating water balance in unicellular organisms?
Mitochondria
Contractile vacuole
Golgi apparatus
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How do unicellular organisms respond to changes in external temperature?
By producing hormones
By sweating
By adjusting their metabolic rate
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What is the primary function of the kidneys in homeostasis?
Synthesis of glucose
Regulation of blood pressure
Production of bile
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Which organ plays a crucial role in maintaining the body's acid-base balance during homeostasis?
Kidneys
Liver
Skin
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What is the main function of the liver in homeostasis?
Regulation of body temperature
Detoxification of harmful substances
Storage of excess glucose
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During hot weather, how does the skin contribute to homeostasis?
By producing digestive enzymes
By synthesizing vitamin D
By releasing excess heat through sweating
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Which hormone, produced by the kidneys, plays a key role in red blood cell production and oxygen transport?
Insulin
Insulin
Estrogen
Erythropoietin
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What is the function of the kidneys in maintaining electrolyte balance during homeostasis?
Regulating calcium absorption
Controlling muscle contractions
Balancing water levels
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How does the liver contribute to glucose homeostasis?
By storing excess glucose as glycogen
By releasing insulin to lower blood glucose levels
By facilitating gas exchange in the blood
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