Select the correct answer. How does a proper warm up affect blood flow?
A.
Blood flow increases.
B.
Blood flow decreases.
C.
Blood flow increases and then decreases.
D.
Blood flow decreases and then increases.

his week a heat wave will be hitting, and most of the country will be experiencing temperatures above average for july. due to humidity, the temperature outside can feel even warmer than it actually is. this adjusted temperature, often referred to as the “feels like” temperature is called the heat index. the chart shows the heat index, which is calculated based on temperature and relative humidity. use this chart to answer the following questions.