Thyroid

Question 1

Key Thyroid Hormones

Answer 1

Thyroxine (T4): Main hormone; converts into T3 in the body.
Triiodothyronine (T3): Active form; influences cells and organs.
Calcitonin: Helps regulate calcium levels in the blood.

Question 1

What is the Thyroid?

Answer 1

A small, butterfly-shaped gland in the neck, in front of the trachea.
It produces hormones that regulate metabolism, energy, and growth.

Question 2

How Does the Thyroid Work?

Answer 2

Controlled by the pituitary gland (produces TSH, or thyroid-stimulating hormone).
When TSH signals, the thyroid releases T3 and T4 into the bloodstream.

Question 3

Thyroid Disorders

Answer 3

Hypothyroidism: Underactive thyroid (low hormones).
Symptoms: Fatigue, weight gain, cold sensitivity, dry skin.
Hyperthyroidism: Overactive thyroid (high hormones).
Symptoms: Weight loss, fast heart rate, heat sensitivity, nervousness.
Goiter: Enlarged thyroid.
Thyroid nodules: Lumps in the thyroid, may or may not affect function.
Thyroid cancer: Rare but treatable if caught early.