Download - THE ENDOCRINE SYSTEM Ch 45. I. Overview of intercellular communication Similarities? Differences?
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THE ENDOCRINE SYSTEMCh 45
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I. Overview of intercellular communication
Similarities?
Differences?
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• The ways that signals are transmitted between animal cells are classified by two criteria –The type of secreting cell–The route taken by the signal in reaching its
target
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• Endocrine signaling:–Hormones secreted into blood and travel to
target cells– Involved in reproduction, growth and
development, homeostasis
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II. Endocrine Glands and Their Hormones
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Two main groups of hormones:Lipid soluble (steroids)Water soluble (proteins, peptides, amines) Where is receptor for lipid soluble hormone?
Where is receptor for water soluble hormone?
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• What determines whether a target cell will respond to a hormone?
http://www.nlm.nih.gov/medlineplus/ency/anatomyvideos/000048.htm
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III. Insulin and Glucagon: Maintaining Blood Glucose Balance
Type of feedback loop?
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• Insulin raises blood glucose levels• Glucagon lowers blood glucose levels• They are antagonistic hormones• http://www.youtube.com/watch?v=CLv3SkF_Eag&list=PLFCE4D99C4124A27A
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IV. Calcitonin and Parathyroid hormone regulate blood calcium levels
Calcitonin lowers blood calcium levelsPTH raises blood calcium levels http://www.mhhe.com/cgi-bin/netquiz_get.pl?qfooter=/usr/web/home/mhhe/biosci/genbio/animation_quizzes/animate_79fq.htm&afooter=/usr/web/home/mhhe/biosci/genbio/animation_quizzes/animate_79fa.htm&test=/usr/web/home/mhhe/biosci/genbio/animation_quizzes/animate_79q.txt&answers=/usr/web/home/mhhe/biosci/genbio/animation_quizzes/animate_79a.txt