The (i)___, controls both the heart rate and the stroke volume. There are two separate nerves from the cardiovascular centre to the sinoatrial node: the (ii)___, to speed up the heart rate and the (iii)___, to slow it down. (i) receives information from special cells called (iv)___, present in the aortic arch and in the carotid sinus.

The (i)___, controls both the heart rate and the stroke volume. There

1.	The (i)___, controls both the heart rate and the stroke volume. There are two separate nerves from the cardiovascular centre to the sinoatrial node: the (ii)___, to speed up the heart rate and the (iii)___, to slow it down. (i) receives information from special cells called (iv)___, present in the aortic arch and in the carotid sinus.
Answer» The (i)___, controls both the heart rate and the stroke volume. There are two separate nerves from the cardiovascular centre to the sinoatrial node: the (ii)___, to speed up the heart rate and the (iii)___, to slow it down. (i) receives information from special cells called (iv)___, present in the aortic arch and in the carotid sinus.