Once Cells in the SA Node Reach Threshold

question 7

Multiple Choice

Once cells in the SA node reach threshold,

• A)an action potential is triggered.
• B)a heart attack occurs.
• C)nothing happens until the AV node is innervated.
• D)the heart stops beating.

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Definitions:

Oedipal Complex

A concept in psychoanalytic theory describing a child's feelings of desire for their opposite-sex parent and jealousy towards their same-sex parent.

Castration Anxiety

A concept in psychoanalytic theory referring to a child's fear of losing their genitalia, believed to play a role in the development of certain complexes and behaviors.

Behaviourism

A psychological approach to understanding abnormal behaviour devised by John B. Watson (1858–1935), which declared that psychology must be restricted to the study of observable features, that is, the behaviour of organisms. Watson considered abnormal functioning to be learned and so believed it could be unlearned. His model for learning was derived from Ivan Pavlov’s (1849–1936) studies of classical conditioning.