the endocrine system. functions controls body functions and helps maintain homeostasis by using...
TRANSCRIPT
![Page 1: The Endocrine System. functions Controls body functions and helps maintain homeostasis by using hormones. hormone – chemical messenger made in one cell](https://reader035.vdocuments.us/reader035/viewer/2022070402/56649f225503460f94c3b2dd/html5/thumbnails/1.jpg)
The Endocrine System
![Page 2: The Endocrine System. functions Controls body functions and helps maintain homeostasis by using hormones. hormone – chemical messenger made in one cell](https://reader035.vdocuments.us/reader035/viewer/2022070402/56649f225503460f94c3b2dd/html5/thumbnails/2.jpg)
functions
• Controls body functions and helps maintain homeostasis by using hormones.
• hormone – chemical messenger made in one cell or tissue that causes a change in another cell or tissue elsewhere in the body.
• gland – a group of cells that make special chemicals for your body.
![Page 3: The Endocrine System. functions Controls body functions and helps maintain homeostasis by using hormones. hormone – chemical messenger made in one cell](https://reader035.vdocuments.us/reader035/viewer/2022070402/56649f225503460f94c3b2dd/html5/thumbnails/3.jpg)
organs• hormones• glands– pituitary– hypothalamus– pineal– thyroid– pancreas– adrenal– ovaries– testes
![Page 4: The Endocrine System. functions Controls body functions and helps maintain homeostasis by using hormones. hormone – chemical messenger made in one cell](https://reader035.vdocuments.us/reader035/viewer/2022070402/56649f225503460f94c3b2dd/html5/thumbnails/4.jpg)
pineal:Produces hormones that help control sleep, aging, reproduction and body temperature.
pituitary and hypothalamus:Produces hormones that help control growth and the release of hormones from other glands. “control center”
thyroid:Produces hormones that help control your metabolism (how fast your body uses energy)
thymus:Immune system cells develop here
adrenals:Produces adrenaline that helps control your heart beat and breathing rate.
pancreas:Produces insulin that helps control glucose movement to the cells.
ovaries:Produces female reproductive hormones like estrogen.
testes:Produces male reproductive hormones like testosterone.
![Page 5: The Endocrine System. functions Controls body functions and helps maintain homeostasis by using hormones. hormone – chemical messenger made in one cell](https://reader035.vdocuments.us/reader035/viewer/2022070402/56649f225503460f94c3b2dd/html5/thumbnails/5.jpg)
• Hormones travel through the bloodstream.• They travel from the gland that makes them
to every cell in the body.• But, only certain cells can respond to certain
hormones. – target cell – the cell a certain hormone can affect.
https://www.youtube.com/watch?v=gjmS4_7kvDM
![Page 6: The Endocrine System. functions Controls body functions and helps maintain homeostasis by using hormones. hormone – chemical messenger made in one cell](https://reader035.vdocuments.us/reader035/viewer/2022070402/56649f225503460f94c3b2dd/html5/thumbnails/6.jpg)
Controlling hormone levels
• The endocrine glands help keep the body in homeostasis by maintaining the right level of hormones.
• feedback mechanism – a cycle of events in which information from one step controls or affects another step
![Page 7: The Endocrine System. functions Controls body functions and helps maintain homeostasis by using hormones. hormone – chemical messenger made in one cell](https://reader035.vdocuments.us/reader035/viewer/2022070402/56649f225503460f94c3b2dd/html5/thumbnails/7.jpg)
• negative feedback – effects of a hormone in the body cause the release of that hormone to be turned down.
![Page 8: The Endocrine System. functions Controls body functions and helps maintain homeostasis by using hormones. hormone – chemical messenger made in one cell](https://reader035.vdocuments.us/reader035/viewer/2022070402/56649f225503460f94c3b2dd/html5/thumbnails/8.jpg)
• positive feedback – effects of a hormone in the body cause the release of more of that hormone.
![Page 9: The Endocrine System. functions Controls body functions and helps maintain homeostasis by using hormones. hormone – chemical messenger made in one cell](https://reader035.vdocuments.us/reader035/viewer/2022070402/56649f225503460f94c3b2dd/html5/thumbnails/9.jpg)
• The endocrine system and the nervous system both send messages around the body.– Nervous system sends quick signals.– Endocrine system sends long lasting signals.
![Page 10: The Endocrine System. functions Controls body functions and helps maintain homeostasis by using hormones. hormone – chemical messenger made in one cell](https://reader035.vdocuments.us/reader035/viewer/2022070402/56649f225503460f94c3b2dd/html5/thumbnails/10.jpg)
• The endocrine system controls levels of growth hormone and tells your body when to stop producing it.
Too much = gigantism Not enough = pituitary dwarfism