What factors contribute to increasing ventilation during exercise?

Increased body temperature and motor impulses from the cerebral cortex are crucial factors that contribute to increasing ventilation during exercise. When a person engages in physical activity, the body generates more heat, leading to an increase in body temperature. This rise in temperature stimulates the respiratory centers in the brain, resulting in an increase in the rate and depth of breathing.

Additionally, during exercise, there is heightened neural activity that originates from the motor cortex—the area of the brain responsible for voluntary movements. As motor impulses increase, they signal the respiratory centers to enhance ventilation in order to meet the rising demands for oxygen and to facilitate the removal of carbon dioxide produced during metabolism. This coordinated response ensures that the body effectively regulates its internal environment and supports sustained physical activity.

The other factors mentioned in the other choices do not align with the physiological responses typically observed during exercise. For instance, increased glucose levels and low blood pressure are not directly linked to ventilation changes, while decreased heart rate contradicts the body's need for increased oxygen delivery during exercise. Lactate buildup does indicate metabolic activity, but an increase in ventilation is primarily driven by the stimulatory effects of temperature and neural impulses.