The Endocrine System Flashcards
What are glands?
Glands are structures that secrete substances
Define exoxrine gland and give an example
Exocrine glands release their product into ducts or tubes
Eg. Salivary glands, sweat glands, tear glands
Define endocrine glands and give an example
An endocrine gland is a ductless gland that produces hormones, which are released directly into the bloodstream
Eg. Testes, pituitary gland, ovaries
What hormones does the pituitary gland produce?
•FSH and LH
• Growth Hormone
Name a deficiency related to a hormone, give its symptoms and corrective measures
Thyroxine deficiency: Thyroid gland
Symptoms: Reduces metabolic rate, tiredness, lack of energy, weight gain
Corrective measure: New born babies are tested for low thyroxine levels as part of the heel test, which allows for administration of thyroxine
Name an example of a gland that has both exocrine and endocrine functions
The pancreas
What is the exocrine function of the pancreas
Produces enzymes (amylase) that flow to the duodenum
What is the endocrine function of the pancreas
The pancreas has cells called islets of langerhans that produce the hormone insulin
What are some hormone supplements
Insulin and anabolic steroids
Give a definition on what method of control, controls thyroxine levels
Negative feedback, the correct level of one item has a negative effect on a previous step in the cycle
What happens when there is a normal concentration of thyroxine
The pituitary gland is inhibited from producing thyroid stimulating hormone (TSH)
What happens when there is a low concentration of thyroxine
The pituitary gland produces TSH
