Psychosocial factors on psychosomatic disease mainly include the individual's stress state, emotion, personality characteristics, mental defence mechanism, social support system and so on.
For Freud, repression was a defence mechanism - the repressed memories are often traumatic in nature, but, although hidden, they continue to exert an effect on behaviour.
A whole set assembly of defence mechanism between bumper and body works well, coordinating in operation. No scratches at least on bumper or door even if slight collision occurred.
Non-specific defence mechanisms involve skin, cilia and mucus, gastric juice and phagocytes.
Mammalian cells make only the single-stranded variety. If a cell’s defence mechanisms detect double-stranded RNA they destroy it, to protect against infection.
