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Preliminary Biology

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2 | Patterns in nature

2: Membranes around cells provide separation from and links with the external environment

Lesson 1 | Substances in tissues

  • Identify the major groups of substances found in living cells and their uses in cell activities

Lesson 2 | Substances in tissues experiment

  • Plan, choose equipment or resources and perform a first-hand investigation to gather information and use available evidence to identify the following substances in tissues:
    – Glucose
    – Starch
    – Lipids
    – Proteins
    – Chloride ions
    – Lignin

Lesson 3 | Membrane

  • Identify that there is movement of molecules into and out of cells

  • Describe the current model of membrane structure and explain how it accounts for the movement of some substances into and out of cells

Lesson 4 | Selectively permeable membrane model

  • Perform a first-hand investigation to model the selectively permeable nature of a cell membrane

Lesson 5 | Diffusion and osmosis

  • Compare the processes of diffusion and osmosis

  • Perform a first-hand investigation to demonstrate the difference between osmosis and diffusion

Lesson 6 | SA to V ratio

  • Explain how the surface area to volume ratio affects the rate of movement of some substances into and out of cells

  • Perform a first-hand investigation to demonstrate the effect of surface area to volume ratio on rate of diffusion

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  • HSCStudy Lab Lessons

    61 Lessons

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

  • HSCStudy Lab Quizzes

    61 Practice questions

    61 lesson quizzes that include a variety of question types. This course also includes 20 focus level and 4 module level tests, as well as a comprehensive end of course practice exam.

  • HSCStudy Lab videos

    61 Hours of video

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

  • HSCStudy Lab interactives

    26 Interactive activities

    Interactive activities that help you explore and understand key syllabus dot point as well as additional resources such as an interactive Periodic Table.

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