Question 2(multiple choice worth 2 points) when pyruvate molecules enter the mitochondrion during cellular respiration, they react to form a. ethyl alcohol and atp b. acetyl-coa and carbon dioxide c. glucose and carbon dioxide d. lactic acid and nad+

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.

d.embryo is the correct one

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