Hormones and Glands Flashcards
(13 cards)
What is the endocrine system?
System of glands that secrete hormones to send signals to effectors, transported via blood (Slower than nervous system)
What is the pituitary gland?
“Master” Gland, sends signals to other glands
Location: Head
What controls growth, metabolism etc
Thyroid Gland
What gland secretes insulin, glucagon and controls blood sugar levels
Pancreas
What gland releases adrenaline
Adrenal Gland
What gland releases sperm or eggs
Testes
What does the pancreas do if blood glucose levels are too HIGH?
Pancreas secretes insulin, which causes glucose to move from bloodstream into cells to be used for respiration
Excess glucose is converted into glycogen as an energy store
What does the pancreas do if blood glucose levels are too LOW?
Pancreas secretes glucagon, which causes the livers and muscles to convert glycogen back to glucose
This is an example of negative feedback
What is type 1 diabetes?
Pancreas doesn’t produce enough insulin for body
Injections needed
What is type 2 diabetes?
Cells no longer absorb glucose
Obesity higher risks
What does the adrenal gland do?
The Adrenal glands (Attached on top of kidneys) release adrenaline into your body, which increases blood flow and breathing rate, to prepare you for ‘fight or flight’
What does thyroxine do?
Controls metabolic rates in the body
What happens if thyroxine levels are too low?
Hypothalamus in brain releases TRH (Thyrotropin releasing hormone) which causes pituitary gland to release TSH
(Thyroid stimulating hormone) which causes thyroid to release more thyroxine
Example of negative feedback