Water is a mixture of hydrogen and oxygen. truefalse

False

Explanation:

Water is not a mixture of hydrogen and oxygen but its a compound composed of hydrogen and oxygen atom bound 2:1 ratio. Well the triple distill water is pure and water from your tap, river, sea is not pure in the sense at least your purified tap water will contain sodium, calcium and related ions.

cellular respiration oxidizes food into energy in the form of atps.

glycolysis (6 c hexose) > 2x atps are used > 6c hexose biphosphate > 2 x 3c triphosphate >

2 x 3c pyruvate (2x nadh produced from nad) and (4x atp produced)

pyruvate actively pumped mitochondrial matrix.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.