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Biology

GCSE · AQA

QuestionsFlashcards

Communicable Diseases
Monoclonal Antibodies
- Producing Monoclonal Antibodies
  6
- Uses of Monoclonal Antibodies
  7
Plant Disease
- Detection and Identification of Plant Diseases
  6
- Plant Defence Responses
  6

Homeostasis Flashcards

All 6 cards in this deck

What is homeostasis?: The regulation of the internal conditions of a cell or organism to maintain optimum conditions for function, in response to internal and external changes.
Which three internal conditions are controlled by homeostasis in the human body?: Blood glucose concentration, body temperature and water levels.
Homeostasis maintains optimum conditions for what two things?: Enzyme action and all cell functions.
What are the three parts of all automatic control systems in the body, and what does each do?: Receptors — cells that detect stimuli (changes in the environment); coordination centres (e.g. brain, spinal cord, pancreas) — receive and process information; effectors (muscles or glands) — bring about responses that restore optimum levels.
True or false? Receptors are the cells that bring about the response in a control system.: False. Receptors detect the stimulus; effectors (muscles or glands) bring about the response.
True or false? Automatic control systems in the body may involve nervous responses or chemical responses.: True. Some control systems use nerve impulses, others use hormones.