Tick the drug influencing the blood flow which is related to antiplatelet agents:

Correct Answer: B

Rationale: The correct answer is B: Aspirin. Aspirin is an antiplatelet agent that works by inhibiting the enzyme cyclooxygenase, thereby reducing the formation of thromboxane A2 which is a potent vasoconstrictor. This action leads to improved blood flow by preventing platelet aggregation and reducing the risk of blood clots. Heparin (A) is an anticoagulant that works by inhibiting clotting factors in the blood, not specifically related to blood flow. Pyracetam (C) and Tanakan (D) are not known to influence blood flow or act as antiplatelet agents.

Correct Answer: C

Rationale: The correct answer is C because the chronic, proliferative phase of inflammation is characterized by tissue degeneration and fibrosis occurrence. During this phase, there is an attempt by the body to repair the damaged tissue by forming new connective tissue and blood vessels. A is incorrect because local vasodilatation and increased capillary permeability are characteristics of the acute phase of inflammation, not the chronic, proliferative phase. B is incorrect because the infiltration of leucocytes and phagocytic cells is typically seen in the acute phase of inflammation, not the chronic, proliferative phase. Therefore, the correct answer is C as it accurately reflects the characteristics of the chronic, proliferative phase of inflammation.

Correct Answer: A

Rationale: The correct answer is A, Piperidines like Loratadine and Fexofenadine are noted for their non-sedating effects due to their low penetration of the blood-brain barrier. This is because they have a low affinity for the central nervous system H1 receptors. In contrast, choices B, C, and D contain antihistamines that are known for their sedative effects due to their high penetration of the blood-brain barrier and high affinity for central nervous system H1 receptors. Therefore, Piperidines are the exception among the listed categories in not causing sedation.

Correct Answer: B

Rationale: The correct answer is B: Vitamin A. Vitamin A can be synthesized from a dietary precursor beta-carotene, which is found in various fruits and vegetables. The body converts beta-carotene into active Vitamin A as needed. Vitamin C (A) cannot be synthesized from a dietary precursor and must be obtained directly from the diet. Vitamin B1 (C) and Vitamin B6 (D) are water-soluble vitamins that cannot be synthesized from dietary precursors.

Correct Answer: A

Rationale: Rationale for Correct Answer (A): 1. A lipoprotein is a conjugated protein with a lipid component, facilitating lipid transportation in the blood. 2. Lipoproteins play a crucial role in transporting lipids such as cholesterol and triglycerides in the bloodstream. 3. They consist of proteins (apolipoproteins) and lipids, enabling solubility of lipids for transport. 4. Lipoproteins are classified based on density (e.g., HDL, LDL), reflecting their lipid and protein composition. Summary of Incorrect Choices: B: This describes vitamins, not lipoproteins. Vitamins are organic substances essential for bodily functions but are not lipoproteins. C: Endocrine gland secretions are hormones, not lipoproteins. Hormones regulate bodily functions and are not directly related to lipid transportation. D: Lipoproteins are not mediators of the inflammatory process. Inflammation involves immune responses, not lipid transport.