pptx, 2.16 MB
pptx, 2.16 MB
docx, 14.47 KB
docx, 14.47 KB
docx, 14.44 KB
docx, 14.44 KB
docx, 63.92 KB
docx, 63.92 KB

This lesson explains how a nerve impulse (action potential) is conducted along an axon and focuses on the role of the sodium and potassium ions. The PowerPoint and accompanying resources have been designed to cover point 8.4 of the Edexcel International A-level Biology specification and contains detailed descriptions of resting potential, depolarisation, repolarisation, hyperpolarisation and the refractory period.

This topic is commonly assessed in the terminal exams so extensive planning ensures that this resource includes a wide range of activities to motivate and engage the students whilst ensuring that the content is covered in the depth of detail that will allow them to have a real understanding. Interspersed within the activities are understanding checks and prior knowledge checks to enable the students to not only assess their progress against the current topic but also to challenge themselves on the links to earlier topics such as methods of movements across cell membranes. There are also a number of quiz competitions which are used to introduce key terms and values in a fun and memorable way and discussion points to encourage the students to consider why a particular process or mechanism occurs.

Over the course of the lesson, the students will learn and discover how the movement of ions across the membrane causes the membrane potential to change. They will see how the resting potential is maintained through the use of the sodium/potassium pump and potassium ion leakage. There is a real focus on depolarisation to allow students to understand how generator potentials can combine and if the resulting depolarisation then exceeds the threshold potential, a full depolarisation will occur. At this point in the lesson students will discover how the all or nothing response explains that action potentials have the same magnitude and that instead a stronger stimulus is linked to an increase in the frequency of the transmission. The rest of the lesson challenges the students to apply their knowledge to explain how repolarisation and hyperpolarisation result and to suggest advantages of the refractory period for nerve cells.

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A bundle is a package of resources grouped together to teach a particular topic, or a series of lessons, in one place.

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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.

£18.00
Bundle

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

£10.00

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