Unit 7: Hormones and Homeostasis Flashcards
What are hormones?
Chemical messengers produced by glands and transported in the bloodstream.
What is the role of insulin?
It lowers blood sugar by promoting glucose uptake into cells.
How does glucagon affect blood sugar levels?
It raises blood sugar by promoting glycogen breakdown in the liver.
What is adrenaline’s function?
It prepares the body for ‘fight or flight’ by increasing heart rate and releasing glucose.
Which hormone regulates metabolism?
Thyroxine.
Where is insulin produced?
In the pancreas.
What triggers the release of adrenaline?
Stress or danger signals.
What is the effect of adrenaline on blood vessels?
It redirects blood flow to muscles.
What type of feedback controls thyroxine levels?
Negative feedback.
How do hormones travel around the body?
Through the bloodstream.
