Video

Transcript

i’ve done a video on the hypothalamus but i’ve  never done a video on the pituitary so we’re  

going to talk about what the pituitary is and what  does it do it’s part of the endocrine system now  

it’s been called the master gland but  to me it’s not really the master gland  

because the hypothalamus is higher than  the pituitary on the echelon of order of  

what controls what so i would just call it like  the middleman okay so you have the hypothalamus  

which if we compare this to a business it’s  the executive director it holds the function  

of the certain plans that are sent down the  organization okay so with the hypothalamus it has  

pre-programmed plans of action depending on the  environment so the pituitary is constantly in  

communication with the environment back  and forth with all your perception of  

getting data and then adapting the various  functions of the body to your environment to make  

sure you stay at a certain constant so that has to  do with what’s called homeostasis the ability to  

be stable within your environment so if it’s cold  your body’s going to pick up information and adapt  

to that coldness if you’re being chased by a tiger  it’s going to adapt to that situation so when i  

say pre-programmed plans i’m talking about various  reactions that occur for various situations so  

the hypothalamus is going to send down the plan  to the middle man which is the pituitary and in  

a business we would call that the manager right  so the manager doesn’t necessarily do the work  

of the organization but it coordinates and gets  other employees or staff to do the work so it’s  

responsible for coordination giving certain people  certain jobs to do and making sure that they do it  

and so they’re also responsible for compliance and  then we have the next echelon in an organization  

where you have employees or staff they’re doing  the work very specific jobs and then when they  

comply the job the manager usually manages  by statistics to make sure that that job was  

done and so the statistics are the feedback that  the manager and the executive director get from  

the workers especially if it’s a very large  organization where there’s a lot of different  

things going on the executive director is not  going to go to every single staff member and find  

out what they did they’re going to work through  managers so they can do more work now if we had  

a football team we would have the owner of the  team we would have the coach and then we have the  

quarterback and then we have the other players now  the pituitary has a front part called the anterior  

part and then a back part called the posterior  part now as far as functions go eighty percent of  

the function is going to be more for the anterior  part so with the back part the posterior part  

we have two main hormones okay oxytocin which does  a lot of things but the two main functions has to  

do with pregnancy the releasing of breast milk  and the contraction of the uterus then we have  

another hormone called vasopressin which has to  do with the retention of fluid in the kidney okay  

it’s called the antidiuretic hormone so it keeps  the water in the body so you’re more hydrated now  

on the anterior part or the front part of the  pituitary so we have a lot of different things  

going on we have the control of the thyroid okay  so it tells the thyroid to release its hormone  

we have the control of the adrenal the outside  of the adrenal which is the endocrine part the  

release of cortisol and other hormones and so that  little tiny part of the pituitary is going to send  

its communication down into the adrenals and  tell it to release its hormone and then we have  

another couple of hormones which i’m not going  to necessarily get bogged down with the names but  

it’s going to tell the gonads both the ovary  and the testicle to release its hormones  

and then we have prolactin which does several  things but one of the main things it does is  

it goes to the breast tissue and it’s involved  in lactation breastfeeding and then we have a  

communication that goes to the liver and that’s  growth hormone and the growth hormone is going  

to go to the liver and tell another hormone what  to do it’s called igf number one which is kind of  

an extension off the growth hormone and then we  also have two hormone-like proteins and enkephalins  

and endorphins that help decrease pain so we have  the hypothalamus that tells the pituitary what to  

do the pituitary then sends communication through  various body tissues releasing various hormones  

that create different functions and then once  those hormones do their function a communication  

is sent back up to the pituitary and the  hypothalamus as a way of complying to the order  

and so then that communication can be turned off  so as soon as it does its function then we have a  

turn off mechanism going on now some of these  hormones are on an automatic thing it’s called a  

circadian wave for example the menstrual cycle the  sleep cycle growth hormone elevates during sleep  

the ovary mechanism happens once a month  so you have a lot of complexities going on  

but the simplicity of this mechanism is similar to  um your thermostat so when it’s hot in a room the  

thermostat adjusts and it starts cooling off and  it’s all on automatic depending on what you set  

so the body has certain set stable standard things  that it operates off of like a temperature usually  

of 98.6 blood pressure 120 over 80 pulse rate  72 etc etc and so everything is based on these  

these set points and then what happens as the  environment changes your body will adapt through  

this endocrine system all for the purpose of  keeping you alive and healthy all right there  

you go that’s the simplicity of the pituitary hey  before you go real quick i have a course entitled  

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