Post on 17-Jan-2016
Regulation of Secretion and Actions of Antidiuretic
Hormone
Process Diagrams Step-by-Step
Copyright © 2007 by John Wiley & Sons, Inc.
Osmoreceptors
High blood osmoticpressure stimulateshypothalamicosmoreceptors
1
Osmoreceptors
High blood osmoticpressure stimulateshypothalamicosmoreceptors
Osmoreceptorsactivate theneurosecretory cellsthat synthesize andrelease ADH
Hypothalamus
1
2
Osmoreceptors
High blood osmoticpressure stimulateshypothalamicosmoreceptors
Nerve impulsesliberate ADH fromaxon terminals inthe posteriorpituitary intothe bloodstream
Osmoreceptorsactivate theneurosecretory cellsthat synthesize andrelease ADH
Hypothalamus
ADH
1
2
3
Osmoreceptors
High blood osmoticpressure stimulateshypothalamicosmoreceptors
Nerve impulsesliberate ADH fromaxon terminals inthe posteriorpituitary intothe bloodstream
Osmoreceptorsactivate theneurosecretory cellsthat synthesize andrelease ADH
Hypothalamus
Sudoriferous(sweat) glandsdecrease waterloss by perspirationfrom the skin
Arterioles constrict,which increasesblood pressure
Kidneys retainmore water,which decreasesurine output
ADH
Target tissues
1
2
3
4
Osmoreceptors
High blood osmoticpressure stimulateshypothalamicosmoreceptors
Low blood osmoticpressure inhibitshypothalamicosmoreceptors
Nerve impulsesliberate ADH fromaxon terminals inthe posteriorpituitary intothe bloodstream
Osmoreceptorsactivate theneurosecretory cellsthat synthesize andrelease ADH
Hypothalamus
Sudoriferous(sweat) glandsdecrease waterloss by perspirationfrom the skin
Arterioles constrict,which increasesblood pressure
Kidneys retainmore water,which decreasesurine output
ADH
Target tissues
1
2
3
4
5
Osmoreceptors
High blood osmoticpressure stimulateshypothalamicosmoreceptors
Low blood osmoticpressure inhibitshypothalamicosmoreceptors
Nerve impulsesliberate ADH fromaxon terminals inthe posteriorpituitary intothe bloodstream
Osmoreceptorsactivate theneurosecretory cellsthat synthesize andrelease ADH
Hypothalamus
Inhibition of osmo-receptors reduces orstops ADH secretion
Sudoriferous(sweat) glandsdecrease waterloss by perspirationfrom the skin
Arterioles constrict,which increasesblood pressure
Kidneys retainmore water,which decreasesurine output
ADH
Target tissues
1
2
3
4
5
6