ATI RN
Cardiovascular Drug Questions
Question 1 of 5
An important action of digitalis is to increase vagal tone. It’s:
Correct Answer: A
Rationale: Step 1: Digitalis increases vagal tone by enhancing parasympathetic activity. Step 2: This results in a decrease in heart rate and improved contractility. Step 3: Therefore, choice A is correct as it accurately states that digitalis increases vagal tone. Summary: Choices B, C, and D are incorrect because digitalis does increase vagal tone, which is a specific action of the medication.
Question 2 of 5
Indicate the vasoconstrictor of endogenous origin:
Correct Answer: D
Rationale: The correct answer is D: Angiotensinamide. This is because angiotensinamide is a hormone produced endogenously by the body that acts as a potent vasoconstrictor. It plays a crucial role in regulating blood pressure by constricting blood vessels. Rationale: 1. Angiotensinamide is a naturally occurring hormone in the body. 2. It acts specifically as a vasoconstrictor, narrowing blood vessels. 3. This physiological function of angiotensinamide helps regulate blood pressure. 4. In contrast, choices A, B, and C are exogenous substances with pharmacological vasoconstrictive effects, not endogenously produced hormones like angiotensinamide. Summary: A, B, and C are incorrect because they are synthetic substances with vasoconstrictive properties, whereas angiotensinamide is the correct answer as it is an endogenous vasoconstrictor hormone in the body.
Question 3 of 5
Thyroid hormones produce various pharmacological effects. Indicate the wrong statement(s).
Correct Answer: A
Rationale: The correct answer is A. Thyroid hormones actually increase the basal metabolic rate, not decline it. This is because thyroid hormones stimulate cellular metabolism and energy production. Choice B is incorrect as thyroid hormones do increase the rate and force of contraction of the heart. Choice C is incorrect as thyroid hormones decrease blood cholesterol levels. Choice D is correct as thyroid hormones do increase heat production through their effects on metabolism.
Question 4 of 5
Which of the following statements about progestins is True:
Correct Answer: D
Rationale: Rationale: A: Progesterone is rapidly absorbed as it has high bioavailability. B: Progesterone is metabolized in the liver to pregnanediol and conjugated with glucuronic acid. C: Progestins and their metabolites are excreted in urine, indicating systemic circulation. Therefore, D is correct as all statements are true.
Question 5 of 5
Antigen is any of various substances, including toxins, bacteria, and the cells of transplanted organs, that when introduced into the body stimulate the production of antibodies. It is also called an allergen or immunogen. This consideration is:
Correct Answer: A
Rationale: The correct answer is A: TRUE. Antigens are indeed substances that trigger an immune response by stimulating antibody production. This is a fundamental concept in immunology. The other choices are incorrect because: - B: FALSE is incorrect because the statement in the question is true. - C: All is incorrect because it implies all choices are correct, which is not the case. - D: None is incorrect because there is a correct answer in this case, which is option A.