and analyse results, their surroundings and to environmental Explain how detection of warm and eg: coordinate their behaviour. changes and stimuli protects the body from coordinate behaviour. danger. salt, coffee response to Information from receptors and lemon temperature passes along cells Explain how the Demo: response to different solutions to taste receptors (neurones) as impulses to nervous system is temperatures. taste skin sensitivity. the central nervous system adapted for its Detecting different tastes on hairpins, ruler, (the brain or the spinal functions. Evaluate different the tongue draw results on blindfolds. – cord). The central nervous methods for measuring Describe the diagram of tongue. reaction time. system coordinates the Teachit Science functions of the main Investigate sensitivity of response of effectors which resource Give data for structures in the different areas of the body. may be muscles contracting conduction velocity nervous system. or glands secreting (m/s) and axon Measure reaction time using Explain the role of hormones. different methods, eg Sheep diameter. Discuss chemicals at choice for axes and Dash Activity (see resources). stimulus receptor → → synapses. appropriate number at coordinator effector → → Required practical 8: plan origin. Students plot Describe and use response and carry out an investigation BBC Bitesize graph. Show and different methods to into the effect of a factor on – Reflex actions are discuss line of best fit. measure reaction human reaction time. AQA automatic and rapid; they time. Required practical 4: do not involve the conscious Biology AT 1, 3 and 4 investigate the effect of Required practical part of the brain. a factor on human Plan for required practical. Make a plan to An example of a simple reaction time. investigate a factor on reflex action is the pain Use knee-jerk and pupil Biology AT 1, 3 and 4 human reaction time. withdrawal reflex. This can reflexes as a stimulus for be explained in terms of a discussion. Students discuss MS 2c, 4a Explain the reflex arc. their importance and gather importance of reflex other examples leading into
their surroundings and to coordinate their behaviour. Information from receptors passes along cells (neurones) as impulses to the central nervous system (the brain or the spinal cord). The central nervous system coordinates the response of effectors which may be muscles contracting or glands secreting hormones. stimulus → receptor → coordinator → effector → response Reflex actions are automatic and rapid; they do not involve the conscious part of the brain. An example of a simple reflex action is the pain withdrawal reflex. This can be explained in terms of a reflex arc. environmental changes and coordinate behaviour. Explain how the nervous system is adapted for its functions. Describe the functions of the main structures in the nervous system. Explain the role of chemicals at synapses. Describe and use different methods to measure reaction time. Required practical Make a plan to investigate a factor on human reaction time. Explain the importance of reflex Explain how detection of stimuli protects the body from danger. Demo: response to different temperatures. Detecting different tastes on the tongue – draw results on diagram of tongue. Investigate sensitivity of different areas of the body. Measure reaction time using different methods, eg Sheep Dash Activity (see resources). Required practical 8: plan and carry out an investigation into the effect of a factor on human reaction time. Biology AT 1, 3 and 4 Plan for required practical. Use knee-jerk and pupil reflexes as a stimulus for discussion. Students discuss their importance and gather other examples leading into and analyse results, eg: response to temperature taste receptors skin sensitivity. Evaluate different methods for measuring reaction time. Give data for conduction velocity (m/s) and axon diameter. Discuss choice for axes and appropriate number at origin. Students plot graph. Show and discuss line of best fit. Required practical 4: investigate the effect of a factor on human reaction time. Biology AT 1, 3 and 4 MS 2c, 4a warm and salt, coffee and lemon solutions to taste hairpins, ruler, blindfolds. Teachit Science resource BBC Bitesize – AQA
AQA-8465-SOW-TOLD.DOCX