A woman enters your clinic with an enlarged thyroi

Question 1 of 5

A woman enters your clinic with an enlarged thyroid and you suspect simple adenomatous goiter. Which of the following would be the best treatment if the laboratory results shows low levels of free T3 and T4?

A. IV infusion of TSH B. Propranolol C. Propylthiouracil D. Levothyroxine

Correct Answer: D

Rationale: Levothyroxine (choice D) treats hypothyroid goiter (low T3/T4) by replacing thyroid hormone, shrinking the gland. TSH infusion (choice A) worsens it, Propranolol (choice B) manages hyperthyroid symptoms, Propylthiouracil (choice C) reduces hormone in hyperthyroidism. Levothyroxine is appropriate.

Question 2 of 5

An action common to most general anesthetics

A. Increase in the cellular threshold of firing B. Potentiation of spontaneous and evoked activity of neurons C. Inhibition of effects of glutamate D. None of the above

Correct Answer: C

Rationale: Many general anesthetics inhibit glutamate (excitatory neurotransmitter) to produce sedation and anesthesia.

Question 3 of 5

Regarding ketamine, which statement is true?

A. Has rapid onset of action B. Is partially renally excreted C. Has no neurological side effects D. Is contraindicated in sick sinus syndrome

Correct Answer: D

Rationale: Ketamine can increase heart rate and is contraindicated in conditions like sick sinus syndrome.

Question 4 of 5

As the physician, you could tell the patient (and close family members) all of the following things about levodopa except?

A. Taking the drug in divided doses will decrease nausea and vomiting B. He should be careful when he stands up because he may get dizzy C. Uncontrollable muscle jerks may occur D. A net-like reddish to blue discoloration of the skin is a likely side effect of the medication

Correct Answer: D

Rationale: Levodopa does not cause livedo reticularis (a net-like skin discoloration), but it can cause other side effects such as nausea, dizziness, and dyskinesia.

Question 5 of 5

Hyperthyroidism can be treated by the following EXCEPT:

A. Carbimazole B. Carbamazepine C. Propranolol D. Propylthiouracil

Correct Answer: A

Rationale: Carbimazole (choice A) and Propylthiouracil (choice D) treat hyperthyroidism by inhibiting thyroid hormone synthesis, Propranolol (choice C) manages symptoms. Carbamazepine (choice B), an anticonvulsant, is unrelated, making it the exception. This clarifies antithyroid therapy.