instruction:
In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
question:
Question: The access of drugs to the central Nervous System is conditioned by the existence of the blood-brain barrier (BHE) barrier: 
 Options:  <1> Increases its permeability in case of inflammation. <2> It is homogeneous throughout the encephalon. <3> It is traversed freely by fat-soluble drugs. <4> It is maximum in the chemoreceptor area of ​​the trigger. <5> Decreases its permeability in case of inflammation.
answer:
1


question:
Question: The cellulose acetate filter membranes are compatible with: 
 Options:  <1> Organic solvents. <2> Aqueous solutions <3> All solvents <4> Organic solvents, except nitrogen. <5> Nitrogen solvents.
answer:
2


question:
Question: With respect to the characteristics of the amino acids, indicate which of the following statements is false: 
 Options:  <1> Amino acids are amphoteric substances that can act as acids or bases. <2> The side chains of the amino acids can be apolar, polar without charge or they can be charged at certain pH values. <3> The side chain of the wing can undergo a process of phosphorylation. <4> The proteins are constituted by Lamino Acids. <5> The amino acids Ser, Thr and Tyr can form ester bonds with a phosphate group.
answer:

3