The pancreas is one of the largest digestive glands in the human body and has both endocrine and exocrine functions. Islet is a group of cells scattered between the pancreatic acinar, and the number from the head of the pancreas to the tail of the pancreas gradually increases. There are four different types of cells in the islets. A cell: secretes glucagon; B cells: smaller than A cells, secretes insulin, proinsulin and C peptide; D cells: secretes growth hormone releasing inhibitory hormone and vasopressin; F cells: secretes pancreatic polypeptide. Insulin promotes glycogen synthesis, inhibits glycogenolysis, inhibits gluconeogenesis and promotes sugar utilization; promotes fat synthesis, inhibits lipolysis; promotes protein synthesis, inhibits protein breakdown; promotes deoxyribonucleic acid (DNA), ribonucleic acid (RNA) And the synthesis of adenosine triphosphate (ATP). C peptide (CP) has no biological activity and is one of the indicators for islet function. The physiological role of proinsulin is similar to that of insulin, but its intensity is weaker than that of insulin. Glucagon promotes the decomposition of substances, ensures the energy supply of tissues between meals, promotes hepatic gluconeogenesis, raises blood sugar, promotes fat breakdown, inhibits gastric acid and pepsin secretion, and increases bile and intestinal fluid secretion. Stimulates the secretion of insulin and growth hormone, stimulates the secretion of calcitonin and thyroxine. Insulin antibodies have the effect of neutralizing blood insulin, delaying the degradation of insulin and activating complement. Pancreatic polypeptide (PP) has the effects of inhibiting gallbladder contraction, reducing bile excretion, inhibiting pancreatic enzyme release, and inhibiting secretion of motilin.
    
    
    
        
    
    
    
        
            
                
                
                    
                        
                        
                        
                        
                        
                        
                            
                                
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                                    Amino compound
                                    
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                                    Oxy-containing amino compound
                                    
                                    
                                    Cycloalkylamines, aromatic monoamines, aromatic polyamines and derivatives and salts thereof
                                    
                                    
                                    Acyclic monoamines, polyamines and their derivatives and salts
                                    
                                    
                                    Amide compound
                                    
                                    
                                    Sulfonic acid amino compound
                                    
                                    
                                
 
                                
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                                    Alcohols, phenols, phenolic compounds and derivatives
                                    
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                                    2-cycloalcohol
                                    
                                    
                                    Halogenated, sulfonated, nitrated or nitrosated derivatives of alcohols
                                    
                                    
                                    Extremely halogenated, sulfonated, nitrated or nitrosated derivatives of phenols
                                    
                                    
                                    Phenol and its halogenated, sulfonated, nitrated or nitrosated derivatives
                                    
                                    
                                    Acyclic alcohol
                                    
                                    
                                
 
                                
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                                    Nitrogen-containing compound
                                    
                                    
                                
 
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                                    Nitrile compound
                                    
                                    
                                
 
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                                    Organic derivative of hydrazine or hydrazine
                                    
                                    
                                
 
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                                    Terpenoid
                                    
                                    
                                
 
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                                    Ether compounds and their derivatives
                                    
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                                    Ether, ether alcohol
                                    
                                    
                                    Halogenation, sulfonation, nitration or nitrosation of ethers, ether alcohols, ether phenols
                                    
                                    
                                
 
                                
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                                    Aldehyde
                                    
                                    
                                
 
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                                    Carboxylic compounds and derivatives
                                    
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                                    Cyclic carboxylic acid
                                    
                                    
                                    Halogenation, sulfonation, nitration or nitrosation of carboxylic acids
                                    
                                    
                                    Halogenation, sulfonation, nitration or nitration of carboxylic anhydrides
                                    
                                    
                                    Carboxylic acid halide
                                    
                                    
                                    Carboxylic esters and their derivatives
                                    
                                    
                                    Salt of carboxylic acid ester and its derivatives
                                    
                                    
                                    Acyclic carboxylic acid
                                    
                                    
                                
 
                                
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                                    Hydrocarbon compounds and their derivatives
                                    
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                                    Aromatic hydrocarbon
                                    
                                    
                                    Cyclic hydrocarbon
                                    
                                    
                                    Hydrocarbon sulfonate
                                    
                                    
                                    Hydrocarbon halide
                                    
                                    
                                    Hydrocarbon nitrite
                                    
                                    
                                    Acyclic hydrocarbon
                                    
                                    
                                
 
                                
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                                    Ketone compound
                                    
                                    
                                
 
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                                    Alkyl ureas and their derivatives and salts
                                    
                                    
                                
 
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                                    Inorganic acid ester
                                    
                                    
                                
 
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                                    Heterocyclic compound
                                    
                                    
                                
 
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                                    Diazo, azo or azo compound
                                    
                                    
                                
 
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                                    Organosilicon compound
                                    
                                    
                                
 
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                                    Organometallic compound
                                    
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                                    Organic palladium
                                    
                                    
                                    Organic germanium, cobalt, strontium, barium, gallium, germanium, germanium, germanium, germanium, etc.
                                    
                                    
                                    Organic calcium
                                    
                                    
                                    Zirconium
                                    
                                    
                                    Organic potassium
                                    
                                    
                                    Organic
                                    
                                    
                                    Organic lithium
                                    
                                    
                                    Organic
                                    
                                    
                                    Organic aluminum
                                    
                                    
                                    Organotin
                                    
                                    
                                    Organic manganese
                                    
                                    
                                    Organic sodium
                                    
                                    
                                    Organic nickel
                                    
                                    
                                    Organic titanium
                                    
                                    
                                    Organic iron
                                    
                                    
                                    Organic copper
                                    
                                    
                                    Organotin
                                    
                                    
                                    Organic zinc
                                    
                                    
                                    Organic
                                    
                                    
                                    Organic
                                    
                                    
                                    Organic germanium, mercury, silver, platinum, etc.
                                    
                                    
                                    Organic germanium, antimony, bismuth, tungsten, antimony, bismuth, lead, vanadium, molybdenum, chromium, antimony, etc.
                                    
                                    
                                
 
                                
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                                    Organic sulfur compound
                                    
                                    
                                
 
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                                    Organic phosphine compound
                                    
                                    
                                
 
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                                    Organometallic salt
                                    
                                    
                                
 
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                                    Organic fluorine compound
                                    
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                                    Fluorobenzoic acid series
                                    
                                    
                                    Fluorobenzonitrile series
                                    
                                    
                                    Fluorobenzaldehyde series
                                    
                                    
                                    Fluorobenzyl alcohol series
                                    
                                    
                                    Fluoroanisole series
                                    
                                    
                                    Fluoroaniline series
                                    
                                    
                                    Fluorophenylacetic acid series
                                    
                                    
                                    Fluorophenol series
                                    
                                    
                                    Fluorobenzoic acid series
                                    
                                    
                                    Fluoronitrobenzene series
                                    
                                    
                                    Fluoropyridine series
                                    
                                    
                                    Potassium fluoroborate series
                                    
                                    
                                    Fluorobenzyl alcohol series
                                    
                                    
                                    Fluorotoluene series
                                    
                                    
                                    Fluorine red series
                                    
                                    
                                    Fluoroethane series
                                    
                                    
                                    Fluoropropane series