Secretion. The stomach produces and secretes several important substances to control the digestion of food. Each of these substances is produced by exocrine or endocrine cells found in the mucosa. 1  The main exocrine product of the stomach is gastric juice â a mixture of mucus, hydrochloric acid, and digestive enzymes.
Strain theory in criminology has focused on the first type of strain, arguing that it is most responsible for the delinquency in our society. Major research traditions in the justice/equity field, however, argue that anger and frustration derive primarily from the second two types of strain.
Differential association theory is perhaps the best known social learning perspective of. criminality and reflects an interpersonal approach. Edwin Sutherland was a sociologist of. the Chicago School and symbolic interactionist thought, credited with bringing the field of. criminology under the sociological umbrella'. Sutherland developed differential. association theory to explain how criminals learn the techniques and means of particular. criminal activities, and how to rationalize such behaviour as normal and enjoyable2.