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Questions and Answers
What is the primary function of thyroxine in the body?
What is the primary function of thyroxine in the body?
- It controls the rate of metabolism. (correct)
- It regulates blood sugar levels.
- It promotes muscle growth.
- It aids in calcium absorption.
Which of the following is a characteristic of the endocrine gland?
Which of the following is a characteristic of the endocrine gland?
- It only produces hormones during specific conditions.
- It is involved in both hormonal and muscular functions.
- It has ducts that transport hormones to organs.
- It secretes hormones directly into the bloodstream. (correct)
Which disorder is associated with a deficiency of thyroxine?
Which disorder is associated with a deficiency of thyroxine?
- Cushing's Syndrome
- Diabetes
- Goitre (correct)
- Grave's Disease
What is one of the roles of insulin produced by the pancreas?
What is one of the roles of insulin produced by the pancreas?
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Which gland has both endocrine and exocrine functions?
Which gland has both endocrine and exocrine functions?
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Which symptom is associated with Grave's Disease?
Which symptom is associated with Grave's Disease?
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Study Notes
Endocrine System Overview
- Endocrine glands are ductless glands that release hormones directly into the bloodstream.
- Hormones play crucial roles in regulating bodily functions and maintaining homeostasis.
Pituitary Gland
- Produces Antidiuretic Hormone (ADH), which helps regulate water balance in the body.
Thyroid Gland
- Produces Thyroxine, a hormone responsible for controlling the rate of metabolism.
Feedback Mechanism
- A regulatory process where the production of one hormone influences the secretion of another, maintaining homeostasis within the body.
Pancreas Functions
- Functions as both an endocrine and exocrine gland.
- Exocrine Role: Secretes pancreatic juice through ducts to the duodenum to aid digestion.
- Endocrine Role: The Islets of Langerhans secrete insulin, crucial for regulating blood sugar levels.
Hormone Supplements
- Insulin is utilized to treat diabetes.
- Oestrogen and progesterone are used in contraceptive pills to prevent pregnancy.
Thyroxine Deficiency
- Goitre is a disorder arising from a deficiency of thyroxine.
- Symptoms of Goitre include lack of energy, fatigue, confusion, depression, and weight gain.
- Treatment options include hormone replacement therapy and an iodine-rich diet.
Thyroxine Excess
- Grave's Disease results from excess thyroxine production.
- Symptoms of Grave's Disease include raised metabolism, weight loss, and nervousness.
- Treatment options for Grave's Disease are available, though specific treatments were not listed.
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