Endocrine
What is the main function of the endocrine system?
It controls long-term body processes like growth, metabolism, mood, and reproduction using hormones.
How does the endocrine system send messages?
It releases hormones into the bloodstream to reach target organs and cells
How do hormones reach their target organs?
Hormones travel through the bloodstream from endocrine glands to specific target organs that recognize and respond to them.
What is the main difference between the nervous and endocrine systems?
The nervous system is fast and short-term (electrical impulses), while the endocrine system is slower but long-lasting (chemical messages).
What does the pituitary gland do?
It’s the “master gland” that controls other glands by releasing hormones like TSH (to the thyroid) and GH (for growth).
What does the thyroid gland control?
It regulates the body’s metabolism — how fast you use energy — through thyroid hormones.
What hormone do the adrenal glands release and what is its role?
They release cortisol, which manages stress response and metabolism.
How does GH help with growth?
It stimulates bone and tissue growth, especially during childhood and adolescence.
What is homeostasis?
t’s the body’s ability to maintain a stable internal environment, such as temperature, water, and sugar levels.
How does the endocrine system help maintain homeostasis?
Hormones signal organs to start or stop actions that restore balance — like regulating blood sugar or body temperature.
Describe how sweating helps maintain a stable body temperature.
When you’re hot, sweat glands release sweat that evaporates, removing heat and cooling the body — an example of homeostasis.
How does the body respond to a sudden drop in internal temperature?
The body shivers (muscles produce heat) and blood vessels tighten to keep warmth in — helping raise body temperature.
How might homeostasis be impacted if a gland produces too much hormone?
It can cause serious imbalances — for example, too much thyroid hormone speeds up metabolism, making the body overactive or tired.