Biology · A-Level · AQA · AQA A-Level Biology - (7402) · Specification point · 3.6.1.3 · Organisms respond to changes in their internal and external environments (A-level only) · Stimuli, both internal and external, are detected and lead to a response (A-level only)
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3.6.1.3 Control of heart rate (A-level only)
| Content | Opportunities for skills development |
|---|---|
Myogenic stimulation of the heart and transmission of a subsequent wave of electrical activity. The roles of the sinoatrial node (SAN), atrioventricular node (AVN) and Purkyne tissue in the bundle of His. The roles and locations of chemoreceptors and pressure receptors and the roles of the autonomic nervous system and effectors in controlling heart rate. | AT h Students could design and carry out an investigation into the effect of a named variable on human pulse rate. MS 2.2 Students could use values of heart rate (R) and stroke volume (V) to calculate cardiac output (CO), using the formula |