Basically when doing exercise your body needs way more oxigen because it is using it up faster to be able to do the exercise. While also increasing the breathing rate, the heart rate also goes up because the body needs to pump more blood as the muscles are moving a lot more.
The answers are:
Zinc ,Iron , Copper , silver , lead , mercury .
Answer: Local chemical conditions
Explanation: A Precapillary Sphincter is a smooth muscle that is located in circles around the capillaries.
The precapillary sphincter helps to coordinate blood flow to the into the capillaries by causing the capillaries to decrease the flow of blood to tissues that are dormant or not active.
Answer:
DNA replication is important because without it, cell division could not occur. With DNA replication, the set of DNA of a cell can be duplicated and then each cell that results from division can have its own entire set of DNA, and cell division can theoretically continue indefinitely.
<span> It is due to the excessive pressure that is created over </span>oxygen<span>.</span>
