pptx, 2.71 MB
pptx, 2.71 MB
docx, 13.16 KB
docx, 13.16 KB
docx, 14.62 KB
docx, 14.62 KB
docx, 14.23 KB
docx, 14.23 KB
docx, 18.34 KB
docx, 18.34 KB

This lesson describes how the nervous system allows effectors to respond to stimuli and also describes hormonal control in animals. The PowerPoint and accompanying resources have been primarily designed to cover points 8.2 & 8.13 of the Edexcel International A-level Biology specification but it can also be used as a revision lesson as there are numerous prior knowledge checks of muscle contraction, protein structure and the control of gene expression.

The lesson begins by challenging the students to recall that a control system contains sensory receptors, a coordination centre and effectors. Sensory receptors are covered in detail later in the topic when some key examples are considered as well as those in the retina, but time is taken now to describe how these structures act like transducers, converting one form of energy into electrical energy and the Pacinian corpuscle is used as an example. The students will learn that the communication between the receptors and the coordination centre and the effectors is by cell signalling and that the effectors can be muscles which contract or glands that release chemicals. The next part of the lesson looks at the differing responses from the nervous and hormonal systems and discusses how this can be governed by the need for a rapid response or more of a long term effect. In terms of nervous control, the students are challenged on their recall of the sliding filament theory of muscle contraction as covered in topic 7. Moving forwards, the students will learn that hormones can be either peptide or steroid hormones and their action at a target cell differs based on their form. Students are tested on their knowledge of protein structure by a series of exam-style questions on insulin and glucagon. They are reminded that steroid hormones can pass directly through the cell membrane and their knowledge of the control of gene expression by transcription factors is tested through a task involving oestrogen and the ER receptor. The lesson concludes by reminding students that the control of heart rate, as covered in topic 7, is a coordinated response that involves both nervous and hormonal control.

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Topic 8: Coordination, Response and Gene Technology (Edexcel Int. A-level biology)

Topic 8 of the Edexcel International A-level biology specification is content heavy and therefore all 11 lessons included in this bundle have been planned to cover this content in an engaging and memorable way. The lessons are filled with a wide variety of tasks, including understanding and prior knowledge checks, guided discussion periods and quick quiz competitions. Answers to all of the knowledge checks are embedded into the PowerPoints to allow the students to assess their progress. The following specification points are covered by this bundle: 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.8, 8.10, 8.13, 8.14, 8.18, 8.19, 8.20 If you would like to get a sense for the quality of the lessons in this bundle, then download the nervous and hormonal control, saltatory conduction and pupil reflex lessons as these have been shared for free.

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Topic 8: Coordination, Response and Gene Technology (Edexcel Int. A-level Biology)

This bundle contains 8 fully-resourced lessons which have been designed to cover the following content in topic 8 of the Edexcel International A-level Biology specification: 8.1: Know the structure and function of sensory, relay and motor neurones 8.2: Understand how the nervous system of organisms can cause effectors to respond to a stimulus 8.4: Understand how a nerve impulse is conducted along an axon 8.5: Understand the role of myelination in saltatory conduction 8.6 (i): Know the structure and function of synapses in nerve impulse transmission 8.6 (ii): Understand how the pupil dilates and contracts 8.8: Understand how the nervous system of organisms can detect stimuli with reference to rods in the retina of mammals 8.10: Know that the mammalian nervous system consists of the central and peripheral nervous systems 8.13: Understand how coordination in animals is brought about through nervous and hormonal control 8.18: Understand how recombinant DNA can be produced 8.19: Understand how recombinant DNA can be inserted into other cells Each of the lessons contains a wide range of activities, which include exam-style questions, guided discussion periods and quick quiz competitions, and these will motivate the students whilst the difficult A-level content is covered If you would like to see the quality of lessons included in this bundle then download the pupil reflex, saltatory conduction and nervous and hormonal control lessons as these have been uploaded for free

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