Category: T

The membrane separating the outer and middle ear. The eardrum (tympanic membrane). The tympanum consists of a membrane in the ear canal between the outer ear and the middle ear. The eardrum resembles the head of a tiny drum. Sound waves cause the tympanum to vibrate. These vibrations stimulate the eighth cranial nerve, which transmits…

Calluses.  

The surgical removal of a cancerous tumor or lesion and a portion of adjacent tissue.  

Breast biopsy followed by breast surgery within hours or days.  

A theory of learning that makes the assumption that classical and instrumental learning are different with respect to the principle of reinforcement.  

An explanation of mood disorders that proposes that there are two types of depressive illnesses, one caused by functional deficits of norepinephrine and the other by functional deficits of serotonin.  

Writing a new insurance policy rather than renewing an old one. Overlapping two strands to form a candy cane effect.  

A method of testing genetic influences by comparing identical and fraternal twins.  

Two individuals from the same birth. May be monozygotic (identical) or dizygotic (fraternal). One of two babies born to a mother at the same time. Either of two offspring born at the same time from the same pregnancy. Twins may result from a single fertilized ovum that divides early in development to form two separate…

A research strategy in behavior genetics in which behavioral patterns of monozygotic and dizygotic twins are compared.