Final answer:
Increased sweat rate during exercise leads to decreased body temperature, potential changes in blood pressure, and altered respiration to facilitate heat loss.
Step-by-step explanation:
When sweat rate increases during activities such as exercise, the body undergoes several physiological changes. Notable effects include decreased body temperature, as the evaporation of sweat from the skin surface takes heat away from the body. Additionally, blood vessels in the skin dilate, which directs more blood to the skin allowing the excess heat to radiate into the environment.
This vasodilation can individually lead to a decreased blood pressure, as the overall resistance to blood flow decreases. However, during exercise, compensatory mechanisms, such as increased heart rate and increased cardiac output, often occur, which can maintain or sometimes increase blood pressure. While sweating increases, the body has to regulate the amount of water and electrolytes, such as sodium (Na+), which can be affected leading to changes in Na+ levels. As blood flow to the skin increases and sweat glands increase their output, the depth and rate of respiration may also increase to further facilitate heat loss.