2. Describe how breathing is controlled by the brain, including what regulatory chemical is detected.

The respiratory centers contain chemoreceptors that detect pH levels in the blood and send signals to the respiratory centers of the brain to adjust the ventilation rate to change acidity by increasing or decreasing the removal of carbon dioxide (since carbon dioxide is linked to higher levels of hydrogen ions in blood

Explanation:

bc all functions made by the body are processes controlled by the brain...as for the chemical i dont know that

Explanation:

answer; the correct answer is conflict- related aggression; +

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.