While the nervous system sends fast electrical signals, the endocrine system uses slower chemical messengers called hormones to coordinate the body.
The pituitary gland, often called the 'master gland', controls many other endocrine glands. The thyroid regulates metabolism, the pancreas controls blood glucose, and the adrenal glands trigger the body's fight-or-flight response.
Why is the pituitary gland sometimes called the 'master gland'?
Because it produces hormones that control the activity of several other endocrine glands in the body
Which hormone does the pancreas release to lower blood glucose levels?
Insulin
The adrenal glands release adrenaline during moments of stress or danger, triggering rapid physical changes like an increased heart rate, preparing the body for quick action — the 'fight-or-flight' response.
What physical change does adrenaline typically cause during a stressful or dangerous situation?
An increased heart rate (among other changes, like increased alertness and blood flow to muscles), preparing the body for quick action
1. Which gland is often called the 'master gland'?
2. Which hormone, released by the pancreas, lowers blood glucose levels?
3. Which gland releases thyroxine, which regulates metabolism?
4. Which gland releases adrenaline during stress or danger?
5. What is the common name for the body's response to adrenaline during danger?
6. Why is the pituitary gland important to the function of other endocrine glands?
7. Name one effect of adrenaline on the body.
8. What might happen if the pancreas did not produce enough insulin?
9. How do hormones typically travel through the body to reach their target organs?
10. Why is hormone signalling generally slower than nervous signalling, yet still well-suited to certain body functions?