Hormones Flashcards
What are hormones?
They are chemicals that are secreted (give out) by glands and are carried around the body in the blood
Does the nervous system have electrical signal if so what else?
Yes the nervous system has an electrical signal along with chemical in synapse (the transmission of the signal by nerves or better known as neurones)
How are the responses of the nervous system?
The speed response is very rapid as the duration of the response is short as the type of response of the nervous system is muscle contraction or secretion
What signal does the hormonal system have?
It has a chemical signal, the transmission of the signal is through the blood stream
What are the effectors of the hormonal system?
Target organs cells in particular tissues
What type of responses in the hormonal system?
The speed response is slow and long as it is a chemical response
In the menstrual cycle, what happens?
1) FSH Is released from pituitary, 2) causes egg to mature and triggers the ovaries to release oestrogen, 3) FSH stops and causes LH to be released along with the eggs, 4) causes ovaries to release progesterone (which maintains the thick uterus lining) and 5) if pregnancy occurs LH stops
What does FSH do?
It promotes the release of oestrogen, promoted growth and maturity of a follicle in the ovaries and is produced by the pituitary and is carried by the blood
What does progesterone do?
It maintains the lining of the uterus after ovulation, once the egg is released it is released from the empty follicle, it inhabits the productions of both FSH and LH, it’s produced and secreted by the ovaries and once it’s levels have decreased, lining of the uterus falls away and is shed during menstruation
What does LH do?
It induces ovulation to occur from the ovary and is produced by the pituitary and carried by the blood
What does oestrogen do?
It builds up and repairs the lining of the uterus after menstruation, it inhabits the production of FSH, it is produced and secreted by the ovaries and it stimulates the release of LH
