The cards Question In osmosis, in which direction is the net movement of water between two solutions? Tap to flip Answer From the more dilute solution to the more concentrated one. Question What is meant by net movement? Tap to flip Answer The overall movement of particles. Question In an experiment, what is a control variable? Tap to flip Answer A variable kept constant between all experiments. Question What is random error? Tap to flip Answer Error that makes results differ by different amounts because of a factor other than the independent variable. Question A potato piece gains mass in a sugar solution. What does this show? Tap to flip Answer Water moved into it by osmosis, because the solution outside was more dilute. Question A potato piece loses mass in a sugar solution. What does this show? Tap to flip Answer Water moved out of it by osmosis, because the solution outside was more concentrated. Question How can the sugar concentration inside potato tissue be found from a graph of mass change? Tap to flip Answer From the concentration at which there was no change in mass. Question Why is there no change in mass at one sugar concentration? Tap to flip Answer The concentration is equal inside and outside the tissue, so there is no net movement of water. Question What is an enzyme? Tap to flip Answer A protein that acts as a biological catalyst. Question What is the human body's optimal internal temperature? Tap to flip Answer About 37°C. Question What is homeostasis? Tap to flip Answer Regulating internal conditions to keep them optimal for enzyme action and all cell functions. Question In homeostasis, what does 'antagonistic' mean? Tap to flip Answer Effectors and effects that work against each other. Question How can changes in body temperature affect the body's chemical reactions? Tap to flip Answer They change the rate of chemical reactions and can affect enzyme activity. Question What can changes in the body's water balance lead to? Tap to flip Answer Dehydration and death. Question What can extreme changes in body temperature lead to? Tap to flip Answer Hypothermia or hyperthermia, and death. Question What can happen to cells when the water content of the fluid around them changes? Tap to flip Answer They can shrink or burst due to osmosis. Question What is vasoconstriction? Tap to flip Answer The narrowing of blood vessels, which reduces blood flow through them. Question What is vasodilation? Tap to flip Answer The widening of blood vessels, which increases blood flow through them. Question Give one response that helps return body temperature to normal when it falls. Tap to flip Answer e.g. erection of hairs or vasoconstriction. Question Give one response that helps return body temperature to normal when it rises. Tap to flip Answer e.g. sweating or vasodilation. Question What is urea? Tap to flip Answer A waste product made when excess proteins and amino acids are broken down. Question What is blood plasma? Tap to flip Answer The liquid part of the blood, containing dissolved nutrients and waste products. Question What two jobs do the kidneys do? Tap to flip Answer Filter waste products from blood plasma and control water balance. Question Which organ system removes waste from blood plasma? Tap to flip Answer The excretory system. Question Where is urine stored until urination? Tap to flip Answer In the bladder. Question In the kidneys, what diffuses out of the blood plasma into the kidney tubules? Tap to flip Answer Water and urea, to be excreted as urine. Question How do the kidneys maintain the body's water balance? Tap to flip Answer By reabsorbing as much water as needed from the urine back into the blood plasma. Question What kind of urine is produced when the body has too much water? Tap to flip Answer Dilute urine. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage GCSE (Years 10–11) Course GCSE Biology Unit Coordination and control: maintaining a constant internal environment Exam boards AQA, Edexcel, OCR Tiers foundation and higher England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked On 2026-11-02, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
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A Biology lesson by Oak National Academy licensed under Open Government Licence (OGL)
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