Quick Answer. In an officially-sanctioned MLB baseball game, there are 9 innings. If the home team is ahead in the top of the ninth and earns 3 outs, the game ends at 8 1/2 innings. If the game is tied after the away team earns 3 outs in the bottom of the ninth, the game goes into extra innings. Keep Learning.
When you exercise, the muscles you use require more energy. When exercise can be sustained, this demand is met primarily by aerobic means. Aerobic energy production in muscles results in increased gas exchange at the lungs, because more oxygen is taken in and more carbon dioxide is released.
Best Answer: As far as I know, carbon dioxide doesn't directly effect blood pressure and pulse rate. Blood oxygen levels are the primary determinate of those vital stats. Blood carbon dioxide levels primarily change the pH of blood and regulate the breathing reflex.I suppose that if your blood CO2 levels get too high, your respiration rate would increase.This increase would keep changing the pressure in the thoracic cavity, increasing venous return in the vena cava.he rate and depth of your breathing will increase as a result of the increase in CO2. (Accumulation of CO2 can occur drastically during periods of heavy activity). Especially during exercise, your body wants to get rid of this CO2 (because this makes the blood more acidic), and gain more oxygen.