Hormonal Communication Flashcards
Endocrine Glands
Secrete Hormones into the blood
Examples are adrenal, thyroid, thymus, pineal, pituitary, pancreas, testes, ovary
What are the two types of hormone?
Steroid - made of cholesterol and are water soluble so pass through membrane. Form hormone/receptor complex which inhibit/induce gene transcription
Non-steroid - made of protein
Bind to receptor on membrane
Trigger cascade reaction (secondary messenger)
How does a steroid hormone work?
Hormone pass through membrane
bind to receptor and form hormone/receptor complex
Complex attach to DNA which synthesise polypeptide
Polypeptide produce change
What are the two parts of Adrenal Gland called?
Medulla and cortex
Which hormone does medulla produce?
Adrenaline and noradrenaline
What hormones are produced by cortex?
Vital Hormone
Gylcocorticoids - regulate metabolism and blood pressure
Mineralcorticoids - aldosterone which control blood pressure by amount water and salt
Androgen - release male sex hormone
What does thymosin do?
Maturation of white blood cell
What hormone is released when blood glucose level is high?
Insulin
What hormones do the ovaries produce?
Oestrogen and Progesterone
What is the exocrine tissue called in pancreas?
Pancreatic Acini
What does the pancreatic acini do?
Produce enzyme and pancreatic fluid which is released into the duodenum
What is the endocrine gland in pancreas?
Islets of langerhan
