Which of the Statements Below Is an Incorrect or False

question 12

Multiple Choice

Which of the statements below is an incorrect or false statement?

• A)Unique to the ABO blood group is the presence in the plasma of preformed antibodies.
• B)Transfusion of incompatible blood can be fatal.
• C)When a transfusion reaction occurs,the oxygen- carrying capacity of the transfused blood cells is disrupted and the clumping of RBCs in small vessels hinders blood flow to tissues beyond those points.
• D)Blood typing for the Kell,Lewis,and Duffy factors is always done before a blood transfusion.

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Definitions:

Absolute Threshold

The minimum stimulus intensity that an organism can detect at least 50% of the time.

Selective Attention

The process by which a person focuses on one or a few sensory inputs while ignoring other stimuli.

Perceptual Set

A tendency to perceive or notice some aspects of the available sensory data and ignore others, influenced by expectations, emotions, and culture.

Expectancy Effect

The phenomenon where a researcher's expectations influence the outcome of a study.