endocrine system pp 1031-1042
DESCRIPTION
ENDOCRINE SYSTEM pp 1031-1042 . Warm-up 4/15: Describe the function of the Endocrine System. What tissues/ organs are part of the endocrine system? . FUNCTION. Controls body function with chemical messengers Hormones: chemical messengers Glands: secrete chemicals/hormones . HORMONES. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: ENDOCRINE SYSTEM pp 1031-1042](https://reader034.vdocuments.us/reader034/viewer/2022051317/5681654a550346895dd7c125/html5/thumbnails/1.jpg)
ENDOCRINE SYSTEMpp 1031-1042
Warm-up 4/15: a. Describe the function of the
Endocrine System.b. What tissues/ organs are part of
the endocrine system?
![Page 2: ENDOCRINE SYSTEM pp 1031-1042](https://reader034.vdocuments.us/reader034/viewer/2022051317/5681654a550346895dd7c125/html5/thumbnails/2.jpg)
FUNCTION
• Controls body function with chemical messengers
• Hormones: chemical messengers• Glands: secrete chemicals/hormones
![Page 3: ENDOCRINE SYSTEM pp 1031-1042](https://reader034.vdocuments.us/reader034/viewer/2022051317/5681654a550346895dd7c125/html5/thumbnails/3.jpg)
HORMONES
• Amino acid-based hormones: first messenger binds to cell surface receptor causing second messenger inside the cell to initiate cell activity
![Page 4: ENDOCRINE SYSTEM pp 1031-1042](https://reader034.vdocuments.us/reader034/viewer/2022051317/5681654a550346895dd7c125/html5/thumbnails/4.jpg)
• Steroid hormones: diffuse through cell membrane to bind to a protein which starts transcription
![Page 5: ENDOCRINE SYSTEM pp 1031-1042](https://reader034.vdocuments.us/reader034/viewer/2022051317/5681654a550346895dd7c125/html5/thumbnails/5.jpg)
![Page 6: ENDOCRINE SYSTEM pp 1031-1042](https://reader034.vdocuments.us/reader034/viewer/2022051317/5681654a550346895dd7c125/html5/thumbnails/6.jpg)
GLANDS• exocrine: secrete nonhormonal chemicals
through ducts (sweat, saliva, mucous, digestive, etc)
• endocrine: secrete hormones into the bloodstream a. gonads: sex hormones b. thyroid: metabolism c. adrenal gland: adrenaline d. pituitary: hormones that affect other glands and growth hormones e. pancreas: insulin and glucagons to regulate sugar f. thymus: stimulates formation of T-cells
![Page 7: ENDOCRINE SYSTEM pp 1031-1042](https://reader034.vdocuments.us/reader034/viewer/2022051317/5681654a550346895dd7c125/html5/thumbnails/7.jpg)
FEEDBACK MECHANISMS
• Homeostasis: stable internal environment• Last step of the series controls the first
![Page 8: ENDOCRINE SYSTEM pp 1031-1042](https://reader034.vdocuments.us/reader034/viewer/2022051317/5681654a550346895dd7c125/html5/thumbnails/8.jpg)
NEGATIVE FEEDBACK
• A secondary substance inhibits production of the initial stimulating substance
A = InsulinB = glucagon (sugar)
![Page 9: ENDOCRINE SYSTEM pp 1031-1042](https://reader034.vdocuments.us/reader034/viewer/2022051317/5681654a550346895dd7c125/html5/thumbnails/9.jpg)
![Page 10: ENDOCRINE SYSTEM pp 1031-1042](https://reader034.vdocuments.us/reader034/viewer/2022051317/5681654a550346895dd7c125/html5/thumbnails/10.jpg)
Negative feedback loops are necessary for homeostasis.
Negative Feedback Loop
Holding breath, CO2 levels rise,
Control system forces exhale, inhale
O2 / CO2 level returns to normal
![Page 11: ENDOCRINE SYSTEM pp 1031-1042](https://reader034.vdocuments.us/reader034/viewer/2022051317/5681654a550346895dd7c125/html5/thumbnails/11.jpg)
POSITIVE FEEDBACK
• A secondary substance stimulates production of the initial stimulating substance
![Page 12: ENDOCRINE SYSTEM pp 1031-1042](https://reader034.vdocuments.us/reader034/viewer/2022051317/5681654a550346895dd7c125/html5/thumbnails/12.jpg)
Birth
![Page 13: ENDOCRINE SYSTEM pp 1031-1042](https://reader034.vdocuments.us/reader034/viewer/2022051317/5681654a550346895dd7c125/html5/thumbnails/13.jpg)
HW
• Worksheet: Nervous and Sense Organs (Due Tuesday)
• Trifold Vocab: homeostasis, neuron, gland, hormone, positive feedback loop, negative feedback loop, synapse, neurotransmitter (Due Wednesday)