8. a stroke is a sudden loss of brain function. it results from a lack of gas exchange with brain tissue, which occurs when the supply of blood to the brain is blocked. a stroke most likely results because of a problem in the system.

What is the identity of the planets?

The cellular plasma membrane is selectively permeable, which means some materials move through it while others cannot. the movement of materials into and out of the cell is called membrane transport. this activity will you identify the different mechanisms of membrane transport

The changes that the students observed, rapid breathing and sweating, would be classified as a to a change in a system.