Choose the appropriate mechanism of vinpocetine ac

Question 1 of 5

Choose the appropriate mechanism of vinpocetine action:

A. It dilates cerebral vessels and improves blood supply B. It constricts cerebral vessels and decreases blood supply C. It stimulates GABA-receptors and thus increases cerebral metabolic processes D. It constricts peripheral vessels and increases blood pressure

Correct Answer: A

Rationale: The correct answer is A because vinpocetine is known to dilate cerebral vessels, leading to improved blood supply to the brain. This mechanism of action helps enhance cerebral circulation and oxygen delivery, thereby potentially improving cognitive function. Choice B is incorrect because vinpocetine does not constrict cerebral vessels and decrease blood supply. Choice C is incorrect as vinpocetine does not directly stimulate GABA-receptors to increase cerebral metabolic processes. Choice D is incorrect as vinpocetine does not constrict peripheral vessels and increase blood pressure.

Question 2 of 5

Which of the following glucocorticoids have one fluoride atom in its chemical structure?

A. Prednisolon B. Fluocinolone C. Triamcinolone D. All of the above

Correct Answer: B

Rationale: The correct answer is B: Fluocinolone. This glucocorticoid has one fluoride atom in its chemical structure, making it the only option that fits the criteria. Prednisolone (A) does not contain any fluoride atoms. Triamcinolone (C) also does not have a fluoride atom. Option D is incorrect because only Fluocinolone (B) has the specific chemical structure with one fluoride atom. Thus, B is the correct answer.

Question 3 of 5

Which of the following histamine H1 antagonists is a long-acting (up to 24-48 h) antihistamine drug?

A. Diazoline B. Diprazine C. Suprastine D. Dimedrol

Correct Answer: A

Rationale: Step-by-step rationale: 1. Diazoline contains cetirizine, a second-generation antihistamine with a long duration of action. 2. Cetirizine has a half-life of approximately 7-10 hours, providing prolonged relief. 3. Its long-acting nature makes it effective in managing allergies for up to 24-48 hours. 4. Diprazine, Suprastine, and Dimedrol do not contain cetirizine and are not known for their long duration of action. Summary: Diazoline (choice A) is the correct answer as it contains cetirizine, a long-acting antihistamine. Choices B, C, and D do not contain cetirizine and are not known for their extended duration of action.

Question 4 of 5

Keratomalacia is:

A. Extreme dryness of the conjunctiva resulting from a disease localized in the eye or from systemic deficiency of vitamin A B. A condition, usually in children with vitamin A deficiency, characterized by softening and subsequent ulceration and perforation of the cornea C. A visual defect marked by the inability to see as clearly in bright light as in dim light D. All of the above

Correct Answer: B

Rationale: The correct answer is B because keratomalacia is specifically defined as softening and subsequent ulceration and perforation of the cornea due to severe vitamin A deficiency. Choice A is incorrect as it describes xerophthalmia, not keratomalacia. Choice C describes photophobia, not keratomalacia. Choice D is incorrect as it includes all the options, but only choice B accurately defines keratomalacia.

Question 5 of 5

Which of the following consideration about type I familial hyperlipoproteinemia is True:

A. Type I familial hyperlipoproteinemia marked by the increased serum concentrations of chylomicrons and triglycerides, which decrease if the diet becomes fat free, decreased concentrations of high- and low-density lipoproteins, which increase if the diet is fat free, and decreased tissue lipoprotein lipase activity B. Type I familial hyperlipoproteinemia characterized by increased serum concentrations of chylomicrons, pre-low-density lipoproteins, and triglycerides that are considered to be the result of a combination of fat and carbohydrate-induced hyperlipemia C. Type I familial hyperlipoproteinemia is caused by a genetic deficiency of lipoprotein lipase or its cofactor apolipoprotein C-II, leading to impaired clearance of chylomicrons and hypertriglyceridemia. D. Type I familial hyperlipoproteinemia presents with increased chylomicrons and triglycerides, xanthomas, and pancreatitis, and improves with dietary fat restriction but not with changes in carbohydrate intake.

Correct Answer: A

Rationale: Rationale: 1. Type I familial hyperlipoproteinemia is characterized by increased chylomicrons and triglycerides in the serum, which decrease with a fat-free diet. 2. High- and low-density lipoproteins decrease with a fat-free diet, contrary to other types of hyperlipoproteinemia. 3. Tissue lipoprotein lipase activity is decreased in type I familial hyperlipoproteinemia. 4. Other choices are incorrect because they do not accurately describe the characteristics and pathophysiology of type I familial hyperlipoproteinemia. Summary: Choice A is correct as it aligns with the hallmark features of type I familial hyperlipoproteinemia. Choices B, C, and D contain inaccuracies regarding the lipid profile, genetic basis, and response to dietary changes in this condition.

Choose the appropriate mechanism of vinpocetine action:

Nurselytic

ATI RN

ATI RN

FHEA Drugs That Affect the Cardiovascular System Quizlet Questions

Question 1 of 5

Question 2 of 5

Question 3 of 5

Question 4 of 5

Question 5 of 5

Access More Questions!

ATI RN Basic

ATI RN Premium

Similar Questions