C4) Control of breathing

Question 1

Brain

Answer 1

Medulla oblongata
Middle of brain
Neurones are responsible for breathing
Controls the diaphragm contracting & relaxing

Question 2

Chemical

Answer 2

Chemoreceptors monitor changing levels of oxygen & carbon dioxide in the blood
Found in the medulla, aortic arch & carotid arteries
Sends signals to the medulla that make changes to breathing