Roots grow into cracks and rocks and break them apart. This is an example of what type of weathering? Rust occurs when iron chemically reacts with oxygen. what type of weathering is this an example of?

Explain the physiological changes that occur when the hypothalamus stimulates the sympathetic nervous system. you can make a flowchart or a simple step process. be sure to include all chemicals/hormones secreted, glands involved and the functions of each chemical/hormone.