Amoebas are single-celled organism that need to obtain food in order to
1. release oxygen into the air
2. protect themselves from other living things
3. get the energy they need to carry out life functions
4. remove harmful chemicals from the environment

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.