This fully-resourced lesson looks at the coordination and control of heart rate by the cardiovascular centre in the medulla oblongata. The engaging and detailed PowerPoint and accompanying resources have been designed to cover the second part of point 6.1.3 of the AQA A-level Biology specification which states that students should know the roles and locations of the sensory receptors and the roles of the autonomic nervous system and effectors in the control of heart rate.
This lesson begins with a prior knowledge check where students have to identify and correct any errors in a passage about the conduction system of the heart. This allows the SAN to be recalled as this structure play an important role as the effector in this control system. Moving forwards, the three key parts of a control system are recalled as the next part of the lesson will specifically look at the range of sensory receptors, the coordination centre and the effector. Students are introduced to chemoreceptors and baroreceptors and time is taken to ensure that the understanding of the stimuli detected by these receptors is complete and that they recognise the result is the conduction of an impulse along a neurone to the brain. A quick quiz is used to introduce the medulla oblongata as the location of the cardiovascular centre. The communication between this centre and the SAN through the autonomic nervous system can be poorly understood so detailed explanations are provided and the sympathetic and parasympathetic divisions compared. The final task challenges the students to demonstrate and apply their understanding by writing a detailed description of the control and this task has been differentiated three ways to allow differing abilities to access the work
This lesson has been written to tie in with the previous lesson on the conducting system of the heart which is also detailed in specification point 6.1.3
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Another fantastic resource. Really engaging and thought provoking for what is another tricky topic! Lots of AfL and extra details for those interested. Thank you!
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