Testosterone feedback... positive or negative?

[agp]

Is the feedback system for steroids, specifically testosterone, positive or negative?

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[Isoprop]

Yes, check out this image:

source: http://www.vivo.colostate.edu/hbooks/pathphys/endocrine/hypopit/lhfsh.html

 

[Charles_Carmichael]

What you have to realize is that it's very, very rare to encounter positive feedback; there are very few mechanisms that act via positive feedback. Maintaining homeostasis requires negative feedback in order to keep levels of hormones, etc. within a narrow, physiologic range.

 

[wanderer]

What you have to realize is that it's very, very rare to encounter positive feedback; there are very few mechanisms that act via positive feedback. Maintaining homeostasis requires negative feedback in order to keep levels of hormones, etc. within a narrow, physiologic range.

....And positive feedback is mainly used for devoting a disproportionally large amount of resources towards a small task, and is done only sporadically at best (like estrogen's effect on LH during ovulation).

 

[TriXStar]

oxytocin hormone is one of the few that receives a positive feedback for mamary gland milk reproduction