Transportation Function of Living Organisms

Worked examples (6)

• 1Define diffusion and its role in a cell (Getting started)
• 2Compare SA:V of a small and a large cube (Getting started)
• 3Why a single-celled organism needs no transport system (Building confidence)
• 4Why a large organism needs a transport system (Building confidence)
• 5Decide which organism needs a transport system from data (Stretch)
• 6Explain why large organisms still use diffusion (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1Name the four components of blood (Getting started)
• 2State the function of plasma (Getting started)
• 3Identify a white blood cell on a diagram (Building confidence)
• 4Match each component to its function (Building confidence)
• 5Group the components by job (Stretch)
• 6Explain why plasma is essential (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1Name what each tissue transports (Getting started)
• 2State what the xylem carries and in which direction (Getting started)
• 3Describe translocation in the phloem (Building confidence)
• 4Compare the substances and directions (Building confidence)
• 5Link xylem structure to its function (Stretch)
• 6Explain why phloem must be living (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1Describe what plasma is (Getting started)
• 2List substances carried by plasma (Getting started)
• 3State the route of carbon dioxide and urea (Building confidence)
• 4Explain the transport of digested food (Building confidence)
• 5Explain why plasma can carry so many substances (Stretch)
• 6Explain the transport of heat energy by plasma (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1State the function of a red blood cell (Getting started)
• 2Identify the shape and its advantage (Getting started)
• 3Explain the advantage of no nucleus (Building confidence)
• 4Loading and unloading oxygen (Building confidence)
• 5Describe how an RBC is adapted to carry oxygen (Stretch)
• 6Explain the oxygen journey lungs → tissues (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1Name the two white blood cell types (Getting started)
• 2What is phagocytosis? (Getting started)
• 3Lymphocytes and antibodies (Building confidence)
• 4Antigen or antibody? (Building confidence)
• 5Distinguish phagocytes and lymphocytes (Stretch)
• 6Why one antibody cannot fight every pathogen (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1State what heart rate means (Getting started)
• 2Effect of adrenaline (Getting started)
• 3Why heart rate increases in exercise (Building confidence)
• 4Interpret a heart-rate graph (Building confidence)
• 5Exercise and adrenaline together (Stretch)
• 6Fitness and recovery time (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1Name the four chambers (Getting started)
• 2Label parts on a heart diagram (Getting started)
• 3Explain the job of a valve (Building confidence)
• 4Why the left ventricle wall is thicker (Building confidence)
• 5Trace the path of blood through the heart (Stretch)
• 6Explain double circulation (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1Name the arteries that supply the heart (Getting started)
• 2State two risk factors for CHD (Getting started)
• 3Explain how plaque damages the heart (Building confidence)
• 4Classify changeable vs unchangeable factors (Building confidence)
• 5Suggest how to reduce CHD risk (Stretch)
• 6Interpret CHD risk data (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response