The disorder characterized by alterations between states of euphoria and depression is known as:

A. schizophrenia.
B. bipolar disorder.
C. unipolar disorder.
D. major depressive disorder.

Answer: B

Psychology

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The cardiovascular system is the first organ system to show any sign of activity

Indicate whether this statement is true or false.

Psychology

When light strikes a molecule of photopigment, the photoreceptor undergoes:

a. An action potential b. Release of neurotransmitter c. Depolarization d. A decrease in the release of a neurotransmitter

Psychology