These interactive flashcards help IB Sports, exercise and health science (SEHS - Old) students Standard Level (SL) and Higher Level (HL) quickly review and memorize the essential definitions, formulas, and terms needed for success in IB Exams. Each card focuses on A.1.2 Maintaining homeostasis and is aligned with the IB Sports, exercise and health science (SEHS - Old) syllabus, ensuring focused revision on core principles, advanced applications, and practical problem-solving. Students can test themselves anytime, anywhere, perfect for reinforcing tricky concepts, learning IB terminology, and committing formulas to memory. By using RevisionDojo's flashcards consistently, learners turn repetition into mastery and enter the exam with confidence.
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Why is homeostasis important?
Homeostasis is crucial for optimal functioning as it maintains a stable internal environment, allowing cells, tissues, and organs to function properly.
Why is homeostasis important?
Homeostasis is crucial for optimal functioning as it maintains a stable internal environment, allowing cells, tissues, and organs to function properly.
What is the range for normal blood pH?
The normal blood pH range is to .
How does CO₂ affect blood pH?
CO₂ forms carbonic acid in blood, which dissociates into hydrogen ions. An increase in CO₂ lowers pH (more acidic), while a decrease raises pH (more alkaline).
What role does the respiratory control center play in pH regulation?
It monitors CO₂ levels and adjusts the respiratory rate to expel CO₂ and restore pH balance.
What is thermoregulation?
Thermoregulation is the process by which the body maintains its core temperature within a narrow range, around (±).
What happens to blood vessels during vasodilation?
During vasodilation, blood vessels widen, increasing blood flow to the surface and allowing heat to dissipate.
What is the body's response to cold conditions?
In cold conditions, the body uses vasoconstriction to reduce heat loss and shivering to generate heat.
What factors influence thermoregulation?
Training status, body composition, environment, and sex differences can all affect thermoregulation.
What is the difference between short-term responses and long-term adaptations to environmental conditions?
Short-term responses are immediate actions like sweating or shivering, while long-term adaptations are acclimatization processes that improve performance and reduce stress on the body.
Give an example of a short-term response to heat.
Sweating.
Give an example of a long-term adaptation to altitude.
Acclimatization to high altitude improves performance and reduces stress on the body.
What is negative feedback in homeostasis?
Negative feedback is a mechanism that detects changes in a controlled condition and triggers responses to reverse those changes.
What is the analogy used to explain homeostasis?
Homeostasis is compared to a thermostat that activates heating or cooling systems to maintain a desired temperature.
What happens to blood vessels during vasoconstriction?
During vasoconstriction, blood vessels constrict to reduce heat loss.
How does training status affect thermoregulation?
Athletes often sweat more efficiently, improving heat dissipation.
What is the body's optimal core temperature?
The body's optimal core temperature is approximately (±).