Homeostasis
Telangana Open School (TOSS) · Class 12 · Biology
Flashcards for Homeostasis — Telangana Open School (TOSS) Class 12 Biology. Quick Q&A cards covering key concepts, definitions, and formulas.
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What is homeostasis?
Answer
Homeostasis is the process by which the body maintains a stable internal environment despite changes in external conditions. It ensures that factors like temperature, water content, sugar levels, and …
Why is homeostasis important for cells?
Answer
Cells require a stable internal environment to function efficiently. Factors like temperature, pH, and chemical concentrations must remain within specific limits. If these fluctuate too much, enzymes …
Give three examples of conditions regulated by homeostasis.
Answer
1. Body temperature (thermoregulation) 2. Blood sugar levels (regulated by insulin and glucagon) 3. Water balance (controlled by kidneys and ADH hormone). These are kept within narrow ranges to ensure…
What is thermoregulation?
Answer
Thermoregulation is the process by which the body maintains a constant internal temperature despite changes in the external environment. In humans, the normal core body temperature is around 37°C. Thi…
Why is thermoregulation necessary?
Answer
Thermoregulation is necessary because enzymes, which control all metabolic reactions, are highly sensitive to temperature. Above 45°C, enzymes get denatured and stop working. Below 0°C, water freezes …
What happens to enzymes at 0°C and below?
Answer
At 0°C and below, enzymes become inactive due to low molecular movement. Although they are not destroyed, their activity slows down significantly. Additionally, freezing of water inside and between ce…
What happens to enzymes at 45°C and above?
Answer
At 45°C and above, enzymes begin to denature. Their three-dimensional structure unfolds, making them unable to bind with substrates. This stops catalytic activity and disrupts metabolic processes. Pro…
What is the optimum temperature for human enzymes?
Answer
The optimum temperature for most human enzymes is between 35°C and 40°C, with 37°C being the average body temperature. At this range, enzyme activity is highest and metabolic reactions proceed efficie…
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