HSCI 100 Chapter Notes - Chapter 10: Endocrine System, Paracrine Signalling, Pineal Gland
15 Jun 2014
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The nervous and endocrine system are important in maintaining homeostasis by: > the hypothalamus bridges regulatory functions of both systems. > the nervous system is able to respond to changes in the external environment. > the information may result in rapid response from the nervous system or more prolonged and stable responses from the endocrine system: exocrine glands. > secrete their product into ducts that carry these products to other organs or outside the body: endocrine glands. > secrete their products directly into the blood stream. What are hormones: hormones are chemical signals that promote communication between cells, body parts and even individuals. Local hormones affect neighbouring cells and this are not carried in the blood stream ~paracrine. Chemical signals that influence the behaviour of other individuals. Bind to a receptor in the plasma membrane. Lipids that enter a cell and affect gene activity and this protein synthesis.
