Blood Basics. Blood is a specialized body fluid. It has four main components: plasma, red blood cells, white blood cells, and platelets. The blood that runs through the veins, arteries, and capillaries is known as whole blood, a mixture of about 55 percent plasma and 45 percent blood cells. About 7 to 8 percent of your total body weight is blood.
Cognitive Dissonance. by Saul McLeod published 2008, updated 2014. refers to a situation involving conflicting attitudes, beliefs or behaviors. This produces a feeling of discomfort leading to an alteration in one of the attitudes, beliefs or behaviors to reduce the discomfort and restore balance etc.or example, when people smoke (behavior) and they know that smoking causes cancer (cognition). Festinger's (1957) cognitive dissonance theory suggests that we have an inner drive to hold all our attitudes and beliefs in harmony and avoid disharmony (or dissonance).
The researchers further speculated that with only $1, subjects faced insufficient justification and therefore cognitive dissonance, so when they were asked to lie about the tasks, they sought to relieve this hypothetical stress by changing their attitude.