Homeostasis

• What is accommodation in the context of vision?

  Changing the lens shape to focus
• What role does adrenaline play in the body?

  Increases heart rate and blood delivery
• What are coordination centres in the body?


  Areas that process information from receptors
• What is dialysis used for?

  Treating kidney failure by filtering blood
• What are effectors in biological systems?

  Muscles or glands that bring about responses
• What is the function of ethene in plants?

  Controls cell division and fruit ripening
• What does geotropism refer to in plants?

  Directional growth response to gravity
• What are gibberellins?

  Plant hormones that initiate seed germination
• What is a gland?

  A group of cells secreting hormones
• What does glucagon do in the body?

  Converts glycogen into glucose for blood
• What is homeostasis?

  Regulation of internal conditions in organisms
• What is hyperopia?

  Long sightedness where nearby objects are blurry
• What is IVF?

  Fertilising an egg using sperm outside the body
• What does LH do in the female reproductive system?

  Stimulates the release of an egg
• What is myopia?

  Short sightedness where distant objects are blurry
• What is homeostasis?

  Maintenance of a constant internal environment
• What is a negative feedback cycle?

  A mechanism that reverses a change
• Why is homeostasis necessary for the body?

  It is needed for enzyme action and cell functions
• What is oestrogen?

  Main female reproductive hormone for uterus growth
• What is phototropism in plants?

  Directional growth response to light
• What does homeostasis control in the human body?

  • Blood glucose concentration
  • Body temperature
  • Water levels
• What are receptors?

  Organs or cells that detect stimuli
• What role do nervous and hormonal communication play in homeostasis?

  They detect changes and respond automatically
• What is a reflex action?

  A rapid and automatic response to a stimulus
• What are the components of control systems in homeostasis?

  • Receptors: detect stimuli
  • Coordination centres: process information
  • Effectors: bring about responses
• What are receptors in the context of homeostasis?

  Cells that detect stimuli in the environment
• What is selective reabsorption?

  Reabsorbing useful molecules back into the blood
• What are coordination centres in the body?

  Brain, spinal cord, and pancreas
• What are stimuli?

  Changes in the environment
• What do effectors do in homeostasis?

  Bring about responses to restore optimum conditions
• What is a target organ?

  The organ a hormone acts on to produce effects
• How does the nervous system help us react to stimuli?

  It coordinates actions in response to stimuli
• What is testosterone?

  Main male reproductive hormone produced by testes
• What do receptor cells do?

  Convert a stimulus into an electrical impulse
• What is the brain?

  An organ controlling complex behavior and functions
• What is the role of sensory neurons?

  They carry impulses to the central nervous system
• What is the central nervous system (CNS)?

  Brain and spinal cord coordinating responses
• What happens in the central nervous system (CNS)?

  Information is processed and responses are coordinated
• What is the eye's function?

  A sense organ sensitive to light and color
• What do motor neurons do?

  Send impulses to effectors to carry out responses