Thyroid Hormone and Cardiovascular Effects

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Questions and Answers

How does thyroid hormone influence cardiac function?

  • By lowering blood pressure
  • By direct and indirect actions (correct)
  • By decreasing heart rate
  • By increasing cholesterol levels in the blood

Which of the following is a prominent clinical consequence of thyroid disease?

  • Liver cirrhosis
  • Lung fibrosis
  • Cardiovascular manifestations (correct)
  • Hypoglycemia

What is the primary cause of Cretinism?

  • High cortisol levels
  • Overactive thyroid gland
  • Thyroid hormone deficiency during fetal development (correct)
  • Excessive iodine intake

How does iodine deficiency affect the thyroid gland?

<p>It results in goiter formation (A)</p> Signup and view all the answers

What are the cardiovascular effects of thyroid hormones?

<p>Direct and indirect actions on cardiac function (B)</p> Signup and view all the answers

What is the general effect of thyroid hormones on metabolism?

<p>Increase in carbohydrate, fat, and protein metabolism (B)</p> Signup and view all the answers

Which of the following is NOT regulated by thyroid hormones in most tissues?

<p>Vitamin metabolism (A)</p> Signup and view all the answers

How do thyroid hormones affect fat metabolism?

<p>Increase fat breakdown (D)</p> Signup and view all the answers

Which condition is associated with an iodine deficiency?

<p>Cretinism (B)</p> Signup and view all the answers

What are the cardiovascular effects of thyroid hormones?

<p>Increased heart rate and blood pressure (C)</p> Signup and view all the answers

In hypothyroidism, which of the following cardiovascular effects is most likely to occur?

<p>Bradycardia (C)</p> Signup and view all the answers

What effect does thyroid hormone have on the numbers of β receptors?

<p>Increases the numbers of β receptors (C)</p> Signup and view all the answers

Which of the following is a common effect of hypothyroidism on the heart?

<p>Decreased cardiac contractility (B)</p> Signup and view all the answers

What happens to the amplification of the β-receptor signal in the presence of thyroid hormone?

<p>It increases (A)</p> Signup and view all the answers

Which condition is characterized by decreased pulse pressure due to its impact on cardiovascular function?

<p>Cretinism (D)</p> Signup and view all the answers

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