The cardiovascular system of a mouse works like that of a human. a mouse is moved from sea level (low altitude) to the top of a mountain (high altitude). how could this mouse's cardiovascular system maintain a similar rate of oxygen delivery to its tissues now that the mouse is at the top of the mountain?

Increase the depth of ventilation.

In high altitude, the oxygen pressure will be much lower that makes the gas exchange rate is lower and decrease the oxygen delivery to the tissue. To counter this, the mouse will increase its depth of ventilation so there is more air inside the lungs for every inspiration.