2,3 DPG is synthesized from 3- phosphoglyceraldehyde through

Correct Answer: A

Rationale: The correct answer is A: Embden Meyerhof pathway. In this pathway, 2,3 DPG is synthesized from 3-phosphoglyceraldehyde through a series of enzymatic reactions involving intermediates like 1,3-bisphosphoglycerate. This process occurs in the glycolysis pathway, specifically in the conversion of glyceraldehyde-3-phosphate to 1,3-bisphosphoglycerate by the enzyme phosphoglycerate kinase. The other choices, B: Krebs Hensleit cycle, C: Hexose monophosphate shunt, and D: Cori cycle, are not involved in the direct synthesis of 2,3 DPG from 3-phosphoglyceraldehyde. Krebs Hensleit cycle is the citric acid cycle, Hexose monophosphate shunt is the pentose phosphate pathway, and Cori cycle is the process of lactate recycling in the liver.

Correct Answer: A

Rationale: The correct answer is A because a pulmonary function test (PFT) measures lung function by assessing how much air moves in and out of the lungs when breathing. This test helps diagnose conditions like emphysema by evaluating lung capacity and air flow. Choice B is incorrect because PFTs do not measure energy obtained from oxygen, but rather focus on lung function. Choice C is incorrect as PFTs do not specifically measure lung elasticity. Choice D is incorrect because PFTs primarily assess air movement in the lungs, not the exchange of oxygen and carbon dioxide between the lungs and blood.

Correct Answer: C

Rationale: Rationale: C is correct because the spleen is a secondary lymphoid organ, not a primary one. The spleen filters blood, not lymph fluid. A is correct as the spleen is located in the described position. B is correct as the splenic vessels do communicate with the spleen at the hilum. D is correct as lymphocytes and dendritic cells are indeed concentrated in the white pulp. Summary: A, B, and D are correct statements about the spleen. C is incorrect because the spleen is a secondary lymphoid organ, not a primary one.

Correct Answer: C

Rationale: Henry's law states that the volume of gas dissolved in a solvent is directly proportional to the partial pressure of the gas above the solvent. This means that as the gas pressure increases, more gas will dissolve in the solvent. Choice C correctly describes this relationship between gas pressure and gas solubility in a solvent. Choices A and B are not related to Henry's law. Choice D is incomplete and does not provide any relevant information about Henry's law.

Correct Answer: A

Rationale: The correct answer is A because at higher temperatures, oxygen dissociation from hemoglobin increases, leading to lower oxygen saturation. This is due to the Bohr effect, where increased temperature shifts the hemoglobin-oxygen dissociation curve to the right. Therefore, the percent of oxygen saturation is greater at 38 degrees Celsius compared to 43 degrees Celsius. Choice B is incorrect because higher temperatures decrease oxygen saturation. Choice C is incorrect as the saturation is not equal at different temperatures due to the Bohr effect. Choice D is incorrect because the saturation at 20 degrees Celsius would be higher than at 38 degrees Celsius.