ASU NUR 311 Exam 4 Questions with Correct Answers.

What two hormones does the thyroid produce? Correct Answer Triiodothyronine (T3) Thyroxine (T4) Which thyroid hormone is converted in the periphery? Correct Answer T4 is converted to T3 Which thyroid hormone is more potent? Correct Answer T3 Describe the steps of thyroid hormone regulation. (TRH, TSH, T3, T4, negative feedback loop) Correct Answer TRH from hypothalmus - TSH from anterior pituitary - T3 & T4 from thyroid - inhibit TSH from anterior pituitary Describe the relationship of TSH levels to T3 and T4 levels. Correct Answer Low T3 or T4 increases TSH, high T3 or T4 lowers TSH Describe common clinical signs and symptoms of hypothyroidism? Correct Answer Goiter; puffy, expressionless face; cold/dry skin; brittle hair; hair loss from scalp & outer half of eyebrows; fatigue; irritability; depression; lack of concentration; cold intolerance; constipation; heavy menses; increased cholesterol Persons over 50 years of age may need what change in the initial dose of levothyroxine? Correct Answer Lowered Discuss the effects on the fetus of maternal hypothyrodism in pregnancy. A person treated for hypothyroidism may need to increase the dose of levothyroxine by how much? Correct Answer Decreased IQ and neuropsychological function of the child. Increase levothyroxine dose by up to 50%. Increase by 30% as soon as pregnancy confirmed Discuss the effects of congenital hypothyroidism in infants. Correct Answer Mental retardation, large tongue, pot belly, dwarfish stature, derangement of growth - nerves, muscles, bone, teeth How long until levothyroxine reaches a plateau? Correct Answer One month Levothyroxine should be given with or without food? Correct Answer Without food Discuss the expected change in TSH when a patient is responding to levothyroxine? Correct Answer TSH decreases to normal levels