Difference between revisions of "Ovaries Endocrine Function - Anatomy & Physiology"

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<big><center>[[Endocrine System - Anatomy & Physiology|'''BACK TO ENDOCRINE SYSTEM ANATOMY & PHYSIOLOGY''']]</center></big>
  
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Reproductive [[Hormones - Anatomy & Physiology|hormones]] tend to have short half lives and act in minute quantities. They bind to specific receptors on their target organs.  
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[[Oestrous Cycle - Anatomy & Physiology|Oestrus Cycle]]
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Reproductive [[Endocrine System - Hormones - Anatomy & Physiology|hormones]] tend to have short half lives and act in minute quantities. They bind to specific receptors on their target organs.  
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[[Female Reproductive Tract -Oestrous Cycle - Anatomy & Physiology|Oestrus Cycle]]
  
  
 
{| border="1" cellpadding="5" cellspacing="0"
 
{| border="1" cellpadding="5" cellspacing="0"
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|+ ''Hormones of the Ovaries''
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|+ ''Hormones of the Testes''
 
!Hormone
 
!Hormone
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!Production and Regulation
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!Produced by
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!Regulation
 
!Action
 
!Action
 
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|<font color=Purple>Oestrogen</font>
 
|<font color=Purple>Oestrogen</font>
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|GnRH from the [[Hypothalamus - Anatomy & Physiology|Hypothalamus]] causes FSH secretion from the [[Pituitary Gland - Anatomy & Physiology|Pituitary Gland]] which stimulates the developing ''follicles'' in the ovary to secrete this hormone.
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|Promotes development of mammary tissue and is vital for thickening of the endometrium prior to implantation. Oestrogens regulate the [[Oestrous Cycle - Anatomy & Physiology|Oestrus Cycle]].
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|GnRH from the [[Endocrine System - Hypothalamus - Anatomy & Physiology|Hypothalamus]] causes LH secretion from the [[Endocrine System - Pituitary Gland - Anatomy & Physiology|Pituitary Gland]] which stimulates the Leydig Cells.
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|This hormone controls and maintains the growth and functions of the reproductive organs. It enhances libido and is essential for spermatogenesis.
 
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|<font color=Purple>Progesterone</font>
 
|<font color=Purple>Progesterone</font>
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|This is produced in the Corpus Luteum after ovulation, and also the [[Placenta Endocrine Function - Anatomy & Physiology|Placenta]] during pregnancy.
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|Sertoli Cells
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|Progesterone is sometimes known as the ''hormone of pregnancy''. It converts the endometrium to its secretory stage to prepare for implantation, reduces the immune response within the uterus to allow for acceptance of the conceptus, and decreases contractility of the smooth muscle.
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|GnRH from the [[Endocrine System - Hypothalamus - Anatomy & Physiology|Hypothalamus]] causes FSH secretion from the [[Endocrine System - Pituitary Gland - Anatomy & Physiology|Pituitary Gland]] which stimulates the Sertoli Cells.
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|Prevents secretion of further FSH from the [[Endocrine System - Pituitary Gland - Anatomy & Physiology|Pituitary Gland]].
 
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|<font color=Purple>Inhibin<font>
 
|<font color=Purple>Inhibin<font>
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|GnRH from the [[Hypothalamus - Anatomy & Physiology|Hypothalamus]] causes FSH secretion from the [[Pituitary Gland - Anatomy & Physiology|Pituitary Gland]] which stimulates the Granulosa cells.
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|Sertoli Cells
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|Inhibits FSH secretion.
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|GnRH from the [[Endocrine System - Hypothalamus - Anatomy & Physiology|Hypothalamus]] causes FSH secretion from the [[Endocrine System - Pituitary Gland - Anatomy & Physiology|Pituitary Gland]] which stimulates the Sertoli Cells.
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|Converted from testosterone, this hormone's function is complex. It may prevent apoptosis of male germ cells.
 
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|<font color=Purple>Relaxin<font>
 
|<font color=Purple>Relaxin<font>
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|This is produced by the Corpus Luteum towards the end of pregnancy as a result of fetal ACTH production.  
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|Sertoli Cells
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|Relaxes the cervix and pelvic ligaments in preparation for parturition.
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|GnRH from the [[Endocrine System - Hypothalamus - Anatomy & Physiology|Hypothalamus]] causes FSH secretion from the [[Endocrine System - Pituitary Gland - Anatomy & Physiology|Pituitary Gland]] which stimulates the Sertoli Cells.
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|Converted from testosterone, this hormone's function is complex. It may prevent apoptosis of male germ cells.
 
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|<font color=Purple>[[Pituitary_Gland_- Anatomy & Physiology#Oxytocin|Oxytocin]]<font>
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|<font color=Purple>[[Endocrine System - <font>
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|Oxytocin is mainly produced by the [[Hypothalamus - Anatomy & Physiology|Hypothalamus]] and secreted by the [[Pituitary Gland - Anatomy & Physiology|Pituitary Gland]], however in some species including primates and ruminants it is produced by the Corpus Luteum.
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|Sertoli Cells
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|In addition to allowing Milk let-down and promoting uterine contractions, oxytocin works along with oestrogen to induce endometrial production of PGF-2a resulting in regression of the Corpus Luteum.
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|GnRH from the [[Endocrine System - Hypothalamus - Anatomy & Physiology|Hypothalamus]] causes FSH secretion from the [[Endocrine System - Pituitary Gland - Anatomy & Physiology|Pituitary Gland]] which stimulates the Sertoli Cells.
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|Converted from testosterone, this hormone's function is complex. It may prevent apoptosis of male germ cells.
 
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[[Category:Endocrine System - Anatomy & Physiology]][[Category:Female Reproduction]]
 

Revision as of 11:22, 3 July 2008

BACK TO ENDOCRINE SYSTEM ANATOMY & PHYSIOLOGY


Reproductive hormones tend to have short half lives and act in minute quantities. They bind to specific receptors on their target organs. Oestrus Cycle


Hormones of the Testes
Hormone Produced by Regulation Action
Oestrogen GnRH from the Hypothalamus causes LH secretion from the Pituitary Gland which stimulates the Leydig Cells. This hormone controls and maintains the growth and functions of the reproductive organs. It enhances libido and is essential for spermatogenesis.
Progesterone Sertoli Cells GnRH from the Hypothalamus causes FSH secretion from the Pituitary Gland which stimulates the Sertoli Cells. Prevents secretion of further FSH from the Pituitary Gland.
Inhibin Sertoli Cells GnRH from the Hypothalamus causes FSH secretion from the Pituitary Gland which stimulates the Sertoli Cells. Converted from testosterone, this hormone's function is complex. It may prevent apoptosis of male germ cells.
Relaxin Sertoli Cells GnRH from the Hypothalamus causes FSH secretion from the Pituitary Gland which stimulates the Sertoli Cells. Converted from testosterone, this hormone's function is complex. It may prevent apoptosis of male germ cells.
[[Endocrine System - Sertoli Cells GnRH from the Hypothalamus causes FSH secretion from the Pituitary Gland which stimulates the Sertoli Cells. Converted from testosterone, this hormone's function is complex. It may prevent apoptosis of male germ cells.
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