This lesson explains why the conduction of an impulse along myelinated neurones is faster than along unmyelinated neurones. The PowerPoint and accompanying resources have been written to cover point (7) of topic 15.1 of the CIE A-level Biology specification.
A wide range of activities are included in this lesson to maintain the motivation of the students whilst ensuring that the detail is covered in depth. Interspersed with the activities are understanding checks and prior knowledge checks to allow the students to not only assess their understanding of the current topic but also challenge themselves to make links to earlier topics such as the movement of ions across membranes and biological molecules.
Over the course of the lesson, students consider the structure of the myelin sheath and specifically how the electrical insulation is not complete all the way along. This leaves gaps, known as the nodes of Ranvier, which allow the entry and exit of ions. Saltatory conduction can be poorly explained by a lot of students so time is taken to look at the way that the action potential jumps between the nodes and this is explained further by reference to local currents. The rest of the lesson focuses on the other two factors which are axon diameter and temperature and students are challenged to discover these two by focusing on the vampire squid.
Get this resource as part of a bundle and save up to 25%
A bundle is a package of resources grouped together to teach a particular topic, or a series of lessons, in one place.
Bundle
Topic 15: Control and coordination (CIE A-level biology)
These 12 lessons cover points 15.1 (1, 3, 4, 5, 6, 7, 9, 10, 11 & 12) and 15.2 (1, 2 & 3) 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.
£23.00
Bundle
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.
£20.00
Something went wrong, please try again later.
Great resources! Would I be able to receive the updated version of the bundle Topic 15: Control and coordination (CIE A-level biology) that I purchased in June?
Report this resourceto let us know if it violates our terms and conditions.
Our customer service team will review your report and will be in touch.
£3.50