HSC Biology‎ > ‎Resources‎ > ‎

Maintaining a Balance

1.Most organisms are active in a limited temperature range


1.1 - identify the role of enzymes in metabolism, describe their chemical composition and use a simple model to describe their specificity on substrates


1.3 - identify the pH as a way of describing the acidity of a substance


1.4 - explain why the maintenance of a constant internal environment is important for optimal metabolic efficiency


1.5 - describe homeostasis as the process by which organisms maintain a relatively stable internal environment


1.6 - explain that homeostasis consists of two stages:

  • detecting changes from the stable state
  • counteracting changes from the stable state


1.7 - outline the role of the nervous system in detecting and responding to environmental changes


1.9 - identify the broad range of temperatures over which life is found compared with the narrow limits for individual species


1.10 - compare responses of named Australian ectothermic and endothermic organisms to changes in the ambient temperature and explain how these responses assist temperature regulation


1.12 - identify some responses of plants to temperature change


1.2 - identify data sources, plan, choose equipment or resources and perform a first-hand investigation to test the effect of:

  • increased temperature
  • change in pH
  • change in substrate

concentrations on the activity of named enzyme(s)


1.8 - gather, process and analyse information from secondary sources and use available evidence to develop a model of a feedback mechanism


1.11 - analyse information from secondary sources to describe adaptations and responses that have occurred in Australian organisms to assist temperature regulation