Susan suffered from a heart attack. when the doctors tested the heart muscle, they found that she had an increased ratio of lactic acid to pyruvic acid in her heart. what does this say about the availability of oxygen in her heart muscle cells

Because of reduced blood supply

Explanation:

The normal heart has low pyruvic acid to lactic acid ratio which shows the heart is working properly and has no problem in it.

The heart with low pyruvic acid to lactic acid ratio shows that it has some respiratory problem and does not have adequate oxygen supply.

Even the person having  very low  pyruvic acid to lactic acid ratio shows respiratory problem.

the farther away the object is from the central star (the sun) it's gravitainal pull on the object is weaker when it is farther

explanation:

answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

explanation: