Hormones are produced and released by endocrine glands. Organs that respond to a certain hormone are called target organs.
Carbohydrates in food are mainly digested into glucose. After you've eaten the concentration of glucose in your blood rises. When it goes too high the pancreas releases insulin. This is carried around the body in your blood.
Insulin effects cells that include those in the liver. These take glucose out of the blood and convert it into glycogen. This acts as a glucose store. So levels of glucose in the blood decreases.
If your blood sugar level goes too low your pancreas releases glucagon. This is carried in the blood so the cells in the liver turn glycogen back into glucose. Glucose is then released in the blood.
Key Words:
Hormones
Endocrine Glands
Target Organ
Glucose
Concentration
Pancreas
Insulin
Glycogen
Glucagon
Questions:
1. What is an endocrine gland?
2. What does glycogen do?
3. Explain the stages involved in the control of rising blood glucose levels by insulin.
What you should've learnt:
That hormones are produced in endocrine glands and transported by the blood to their target organs
How blood glucose levels are regulated by insulin and excess blood glucose is converted to glycogen in the liver.
How blood glucose levels are regulated by glucagon causing the conversion of glycogen to glucose.
No comments:
Post a Comment