hormones Definition and 18 Threads

Hello everyone, renin is mentioned sometimes as a hormone and others as an enzyme, is it both? can anyone tell me the final answer?

I have been studying about the physiology of hunger. I have studied about the hormones that are involved in the process of hunger, like ghrelin, leptin, pancreatic polypeptide, cholecystokinin, cholecystokinin (CCK) and the neurons like AgRP, POMC and neuropeptide Y (NPY) etc. I understand...

What effect do stress hormones like cortisol and adrenaline have on the limbic system?

Recently I came upon the description of medical tests for hormones like cortisole, or tyroid hormones like T3 and T4, which use polyclonal antibodies from hamsters, pigs, sheep or thelike. As far as I know, they are obtained by vacunating these animals and harvesting the antibodies from their...

Thing is, I have a male cat which is very wild, sometimes when I'm walking on a room it would came towards me to attact me as a pray, sometimes it hurts me...I told a friend about it and she told me that if I castrate my cat it wouldn't behave that way again. So, as I know that this behavior is...

Which are the hormones that the placenta secretes? I have contradicting facts from the web, from my books and from my teachers I know for certain HCG, HPL and relaxin are secreted, other than that?

Does anybody know of any studies that effect how society regulates neurotransmitters and/or hormones in the body; especially long term. Specifically any studies about how they (especially neurotransmitters) regulate in social groups. Its a theory I have and I'd like to see if there is anything...

Can someone please explain to me how resistance training affects hormones? And what effects insulin has on the body post-exercise? Thanks!

I was idly reading this article... http://www.msnbc.msn.com/id/43446129/ns/health-diet_and_nutrition/ ...when I came to this passage: Really, is it believed that we don't know all of the hormones in our system? If so, is it likely that there are "many" that we don't know about yet...

Hello everyone, This is a DIT molecule. Now the book says there is a coupling reaction DIT + DIT ----> gives T4 molecule or tyroxine hormone Now this is how T4 looks like I don't understand how you can get this when there is a addition reaction between these two. Does...

Hello everyone, Why is that in sheehan's syndrome there is no deficiency of posterior pituitary hormones. Ok they are synthesized in hypothalamus, but they are stored in posterior pituitary. So if the gland is damaged how are they secreted? Also there seems to be a trasient polyurea associatd...

I'm trans, and am in a personal conflict over whether or not to start hormones. I know that counseling is required first, but it is such a major decision that I feel that I should have more of a settled direction or plan than I currently do. I'm wondering if anyone here knows anything about the...

Hi all, sorry if this has been asked before but i can't find a thread with the info I'm after. I'm doing an access course at lvl3 (AS/A2) which includes biology and I'm stuck on the following question as part of an assignment I'm to hand in next week. Q: Suggest an explanation for the fact...

when you smoke there is a two stage action that takes place. It is hard to know where to start though. It is like the chicken and the egg. Take last week for instance, or maybe the last week you were a smoker. There will have been a cycle happening in your body that will have been dictated by...

Can we modify hormones? I mean can I decrease the STH by stimulating another hormone?

I have a question that says: Which of the following hormons are produced in the kidneys: Insulin, adrenaline, growthhormon, EPO or thyroxine ? Thanks again :D

I have noticed that on days 28-4 my memory is awful. I have also noticed that during this period if I consume alcohol, I seem become intoxicated rapidly, and forget things much more than I normally would drinking the same amount. I tried to look at charts, but could not really work out a reason...

A few questions on hormones (again :biggrin: ): What stimulates oestrogen production? Is it FSH and LH, or just FSH Does oestrogen inhibit or stimulate LH production? The material I got says that ostrogen inhibits both FSH and LH but from the Edexcel board in the mark scheme it...