In the tissue (of our bodies), what are two waste products that affect the partial pressure gradient (in respect to the respiratory system).

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.