This engaging lesson covers the detail of the 2nd part of specification point 6.2.2 of the AQA A-level Biology specification which states that students should be able to explain temporal and spatial summation as well as understand inhibition by inhibitory synapses. This is a topic which is generally poorly understood by students or brushed over so considerable time has been taken to design the activities to motivate the students so that the content is memorable whilst still being covered in detail. Links are continually made to earlier topics in this module such as synapses and generator potentials but also to topics covered in the previous year and still to be covered.
The lesson begins by challenging the students to recognise a description of generator potential and they will then discover that this is also known as an EPSP. Students will recall that a small depolarisation may not lead to the opening of the voltage gated channels and therefore the full depolarisation which is needed for the initiation of an action potential and will discuss how this problem could be overcome. Lots of discussion points like this are included in the lesson to encourage the students to challenge and debate why a particular process of mechanism occurs. Students will therefore learn that EPSPs can be combined and this is known as summation. A quiz round is used to introduce temporal and spatial summation. Moving forwards, students are presented with a number of examples where they have to decide why type of summation is involved. Again, the lesson has been written to include real-life examples such as chronic pain conditions so the chances of the content sticking is increased. The final part of the lesson introduces IPSPs and the effect of these on summation and action potentials is discussed.
This lesson has been designed for students studying on the AQA A-level Biology course and ties in well with the other uploaded lessons from topic 6 which include cholinergic synapses and neuromuscular junctions, sensory receptors and nerve impulses
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AQA A-level Biology Topic 6: Organisms respond to changes in their internal and external environments
This bundle contains 20 fully-resourced and detailed lessons that have been designed to cover the content of topic 6 of the AQA A-level Biology specification which concerns the responses of organisms to stimuli. 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. The following sub-topics are covered in this bundle of lessons: * Survival and response in flowering plants * The protective effect of a simple reflex * The role of sensory receptors as outlined by the Pacinian corpuscle * The human retina as a sensory receptor * The differences in rods and cones that enable different sensitivity to light, colour and visual acuity * The roles of the SAN, AVN, Bundle of His and Purkyne fibres in the conduction system of the heart * The control of heart rate * The structure of a myelinated motor neurone * The factors that affect the speed of conduction of an impulse * The generation and transmission of nerve impulses * The transmission at a cholinergic synapse and a neuromuscular junction * Summation * The contraction of skeletal muscles * The structure and properties of slow and fast skeletal muscle fibres * The principles of homeostasis including negative feedback systems * The control of blood glucose concentration by the controlled release of insulin and glucagon * The causes and control of diabetes type I and II * The gross structure of the kidney * The detailed structure of the nephron * The production of glomerular filtrate * The reabsorption of glucose and water in the PCT * Maintaining a gradient of sodium ions in the medulla by the loop of Henle * The role of the hypothalamus, posterior pituitary and ADH in osmoregulation This is one of the 8 topics which have to be covered over the length of the 2 year course and therefore it is expected that the teaching time for this bundle will be in excess of 2 months If you want to see the quality of the lessons before purchasing then the lessons on responses in flowering plants, saltatory conduction, the contraction of skeletal muscles and ultrafiltration are free resources to download
£33.50
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Topic 6.2: Nervous coordination (AQA A-level Biology)
All 4 lessons included in this bundle are fully-resourced and have been designed to cover the content as detailed in topic 6.2 (Nervous coordination) of the AQA A-Level Biology specification. The specification points that are covered within these lessons include: * The structure of a myelinated motor neurone * The establishment of a resting potential * Depolarisation * All or nothing principle * Factors affecting the speed of conductance The lessons have been written to include a wide range of activities and numerous understanding and prior knowledge checks so students can assess their progress against the current topic as well as be challenged to make links to other topics within this module and earlier modules If you would like to sample the quality of the lessons, download the saltatory conduction lesson which is free
£8.75
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