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HSC Biology

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1 | Maintaining a balance

1: Most organisms are active in a limited temperature range

Lesson 1 | Temperature

  • Identify the broad range of temperatures over which life is found compared with the narrow limits for individual species

Lesson 2 | Enzymes

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

Lesson 3 | Factors affecting enzymes

  • 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)

  • Identify the pH as a way of describing the acidity of a substance

Lesson 4 | Homeostasis

  • Explain why the maintenance of a constant internal environment is important for optimal metabolic efficiency

  • Describe homeostasis as the process by which organisms maintain a relatively stable internal environment

  • Explain that homeostasis consists of two stages:
    – Detecting changes from the stable state
    – Counteracting changes from the stable state

Lesson 5 | Nervous system and feedback

  • Outline the role of the nervous system in detecting and responding to environmental changes

  • Gather, process and analyse information from secondary sources and use available evidence to develop a model of a feedback mechanism

Lesson 6 | Temperature regulation

  • Compare responses of named Australian ectothermic and endothermic organisms to changes in the ambient temperature and explain how these responses assist temperature regulation

  • Identify some responses of plants to temperature change

  • Analyse information from secondary sources to describe adaptations and responses that have occurred in Australian organisms to assist temperature regulation

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  • HSCStudy Lab Lessons

    59 Lessons

    Lessons by expert teachers that cover the NSW HSC Biology Syllabus comprehensively.

  • HSCStudy Lab Quizzes

    59 Practice questions

    59 lesson quizzes that include a variety of questions. This course also includes 15 focus level and 3 module level tests, as well as a comprehensive end of course practice exam.

  • HSCStudy Lab videos

    59 Hours of video

    Videos that fully explain complex biology questions through animation, practical experiments, and tutorials.

  • HSCStudy Lab interactives

    29 Interactive activities

    Interactive activities that help you explore and understand key syllabus dot point as well as additional resources.

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