| Front | What are the two receptors which provide information that affect heart rate? |
|---|---|
| Back | 1. Baroreceptors - detect changes in blood pressure. Found in the aorta, vena cava and cartoid arteries. 2. Chemoreceptors - Detects changes in the levels of chemicals in the blood e.g. Carbon dioxide. Found in the aorta, cartoid artery and the medulla. They are sensitive to changes in the pH of the blood. 3. Heart rate is also affected by hormones such as adrenaline, which affects the pacemaker region of the heart and speeds it up. |
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