Chapter 13: Thyroid Hormon Flashcards Preview

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Flashcards in Chapter 13: Thyroid Hormon Deck (6)
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1
Q

what is the overall function of the thyroid hormone?

A

to increase metabolic rate

2
Q

how does the thyroid hormone increase metabolic rate?

A

increases enzyme levels and the number of mitochondria in cells

3
Q

thyroid hormone secretion is controlled primarily by the what?

A

thyroid stimulating hormone which is secreted by the anterior pituitary gland

4
Q

what is the secretion of the thyroid stimulating hormone regulated by?

A

a hypothalamic releasing hormone called thyrotropin-releasing hormone

5
Q

under secretion of the thyroid hormone is called

A

hypothyroidism: metabolic rate decreases 40-50%

symptoms include: weight gain, low body temp, slow pulse, slow reflexes, diminished alertness, fatigue

6
Q

over secretion of thyroid hormone is called

A

hyperthyroidism: metabolic rate can increase 60-100% above norm.
symptoms: weight loss despite an increase in appetite and food intake, poor tolerance to heat, fast pulse, irritability, fatigue but unable to sleep

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