This lesson outlines the role of sensory receptor cells in the detection of stimuli and describes the generation of an impulse in a sensory neurone. The PowerPoint and accompanying resources have been planned to cover points 4 & 5 of topic 15.1 of the CIE A-level biology specification (for assessment in 2025-27) and use the chemoreceptors in taste buds as the example to describe the sequence of events.
The previous lesson described the structure and function of sensory and motor neurones and the 1st task challenges the students on their recall of this content to generate the key term, stimuli. Students will recall that this is a change in the environment and that sensory receptor cells are responsible for the detection of these changes. A quick quiz round called “REACT” introduces several stimuli and then students will learn that sensory receptor cells act as specialised transducers by converting one form of energy into electrical energy. Students are introduced to key terms which will be covered in greater detail in upcoming lessons, including resting potential and depolarisation, and they will be challenged to use these in the final task of the lesson. The Pacinian corpuscle is shown and its role in the detection of pressure described, including how sodium ions enter the generator region of the sensory neurone. The remainder of the lesson describes the sequence of events that result in the conduction of an action potential along a sensory neurone after the detection of new chemicals by chemoreceptors in taste buds.
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Topic 15.1: Control and coordination in mammals (CIE A-level Biology)
This bundle contains 9 fully-resourced and detailed lessons that have been designed to cover the content of topic 15.1 of the CIE A-level Biology specification (for assessment in 2025-27) which concerns the control and coordination in mammals. The wide range of activities included in each lesson will engage the students whilst the detailed content is covered and the understanding and prior knowledge checks allow them to assess their progress on the current topic as well as challenging them to make links to other related topics. Many of the tasks are differentiated to allow differing abilities to access the work and be challenged. Topic 15.1 specification points 1, 3, 4, 5, 6, 7, 9, 10, 11, and 12 are covered by these lessons If you want to see the quality of the lessons before purchasing then download the lessons on sensory, morot and intermediate neurones and the structure and role of the cholinergic synapse as these have been shared for free.
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Topic 15: Control and coordination (CIE A-level biology)
These 10 lessons cover points 15.1 (1, 3, 4, 5, 6, 7, 9, 10, 11 & 12) and 15.2 (2) from topic 15 of CIE A-level biology specification (for assessment in 2025 - 27). This topic is titled control and coordination and concerns comparisons between the endocrine and nervous system in mammals, and then the key structure of the nervous system before looking at this control in plants. Each lesson has been extensively planned and contains a wide range of engaging activities and tasks, interspersed with current and prior knowledge checks. The sensory, motor & intermediate neurones and cholinergic synapses lessons have been shared for free, if you want to download first to get an idea for the quality of these lessons.
£19.50
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