aim: how does the endocrine system work in our body?
TRANSCRIPT
Aim: How does the Endocrine System work in our body?
The Endocrine System
FUNCTIONS:- Maintains stable body function
(homeostasis)- Responds to changes- Collection of glands that produce
hormones- Control processes that happen slowly
(nervous system controls those that happen quickly)
What are glands?
- Tissues found throughout your body- Produce chemical messages
HORMONES- speed up or slow down cellular activities
- Glands release their hormone directly into the blood transports to target tissue
FUNCTIONS:- Regulate internal environment- Adapt to stressful situations- Growth & development
Types of Glands:
• Pituitary – Located in the brain– Growth and reproduction– ‘master’ gland– Hypothalamus
• controls the pituitary gland• Specialized cells located in brain that link the
endocrine system with the nervous system
• Thyroid– Located below the larynx– Regulates metabolism and bone growth
Important Hormones
Androgens- Testosterone – male reproductive hormone- Estrogen – female reproductive hormone
Insulin/ Glucagon- Work together to maintain stable levels of blood sugar- Insulin- released when levels of blood sugar are high- Glucagon- causes the liver to release stored glucose
from cells into the body when glucose is low
What does the endocrine system do????
• Hormone secreted travels to ‘target’ cell– Each have a specific receptor
• Negative Feedback System– Controls the amount of hormones in your
body- adjusts hormone levels automatically– Example:
STIMULUS- eating a sandwich
1. Intestine takes in glucose• Glucose in bloodstream increases• Glucose detected by insulin from pancreas• Pancreas responds by producing more insulin• Insulin released liver takes up glucose• Glucose level decreases (body consumes glucose)• Homeostasis restored