Which process breaks down sugars to make atp when oxygen is present

in the presence of oxygen, following glycolysis, Krebs cycle & oxidative phosphorylation take place in the mitochondria to break down glucose to make ATP

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.