Endocrine - elearning.kocw.netelearning.kocw.net/contents4/document/lec/2013/Uiduk/... · 2014. 4....
Transcript of Endocrine - elearning.kocw.netelearning.kocw.net/contents4/document/lec/2013/Uiduk/... · 2014. 4....
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Endocrine
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Endocrine
내분비
내분비(endocrine): 분비 물질이 혈액으로 방출
외분비(exocrine): 분비 물질이 도관(duct)으로 방출
• 호르몬(hormone): 다른 기관이나 조직의 활동에 영향을 주거나 통제하는 화학적 전달체
• target cell, target organ
• receptor(specificity)
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Endocrine
신경계통 vs 내분비계통
신경 계통 내분비 계통
신경섬유, 신경전달물질 호르몬
자극에 대한 빠른 반응 시간 자극에 대한 긴 반응 시간, 오래 지속
신체 일부에 국한 넓은 반응 범위
유선정보 전달계통 무선정보 전달계통
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Endocrine
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Endocrine
호르몬의 특성
호르몬 분류
• 스테로이드 H.
- 콜레스테롤에서 유래
- 세포 내 수용체에 작용
• 단백질 H.
- 아미노산, 단백질에서 유래
- 세포막 수용체에 작용
1차 전령
2차 전령
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Endocrine
호르몬의 특성
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Endocrine
호르몬의 특성
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Endocrine
호르몬의 특성
호르몬 분비 조절
1) 음성되먹임 기전
2) 양성되먹임 기전
: 젖 빨기, 분만 시 옥시토신 분비
3) 중추신경계에 의한 조절
: 스트레스에 의한 생리 주기 변화
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Endocrine
뇌하수체 H.
터키안장(sella turcica)
뇌하수체
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Endocrine
뇌하수체 H.
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Endocrine
뇌하수체 H.
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Endocrine
뇌하수체 앞엽 H.
성장호르몬(growth H. GH)
성장기 분비이상소인증, 거인증
성인 과다분비말단비대증
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Endocrine
뇌하수체 앞엽 H.
갑상샘자극호르몬(thyroid stimulating hormone, TSH)
- 갑상샘 H. 생성, 분비 촉진
부신겉질자극호르몬(adrenocorticotrophic hormone, ACTH)
- 분신겉질 H. 생성, 분비
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Endocrine
뇌하수체 앞엽 H.
난포자극호르몬(follicle stimulating hormone, FSH)
- 여성: 난포 발육, 에스트로겐 분비 촉진
- 남성: (사이질세포 자극) 정자 형성, 성숙
황체호르몬(luteinizing hormone, LH)
- 여성: 배란, 황체 형성, 프로게스트론 분비
- 남성: 테스토스테론 분비
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Endocrine
뇌하수체 앞엽 H.
프로락틴(prolactin)
• 젖 생산 촉진
• 생식 기능 억제(수유 중 배란x)
• 임신 5주 시작~ 임신 말기 최고
임신 중: 태반에서 에스트로겐, 프로게스테론
분비로 젖 분비 억제
분만 후: 태반 분비 사라져 젖 분비
분만 수주 후 임신 전 수준 회복되지만…수유 시 자극 → 프로락틴 분비 촉진
• 황체호르몬(LH) 분비 촉진
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Endocrine
뇌하수체 중간부위
멜라닌세포 자극호르몬
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Endocrine
뇌하수체 뒤엽 H.
항이뇨호르몬(antidiuretic hormone, ADH)
• vasopressin
• 먼쪽곱슬세관, 집합관에서 물의 재흡수 촉진
• 뇌하수체 뒤엽의 기능 저하: 요붕증(다뇨, 탈수)
• 혈관 수축: 혈압 상승
• 체액량 감소 시 ADH 분비 촉진
• 술: ADH 분비 억제
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Endocrine
뇌하수체 뒤엽 H.
옥시토신(oxytocin)
• 젖 배출
• 자궁 수축