There are 25 million to a billion different T-cells in your body. Each cell has a unique T-cell receptor that can fit with only one kind of antigen, like a lock that can fit with only one shape of key. Antigens and receptors work a lot like a lock and key. Each of the 25 million to a billion different T-cells fit with a different shape of antigen.
Motivating operation. Motivating operation (MO) is a behavioristic concept introduced by Jack Michael in 1982. It is used to explain variations in the effects in the consequences of behavior. Most importantly, a MO affects how strongly the person is reinforced or punished by the consequences of their behavior.
âActing is the expression of a neurotic impulse. Itâs a bumâs life. . . . The principal benefit acting has afforded me is the money to pay for my psychoanalysis.â. âAn actorâs a guy, who if you ainât talking about him, ainât listening.â.