AP Psychology Unit 1: Biological Bases of Behavior

Researchers study identical twins raised apart to investigate the relative contributions of heredity and environment to personality. This research design is best described as a:

A patient suffers a stroke and afterward can understand spoken language and read normally, but their own speech is slow, effortful, and limited to short ungrammatical phrases like "want... water... now." This pattern is consistent with damage to which area, and is known as which type of aphasia?

A neurotransmitter that generally inhibits neural firing and is linked to anxiety disorders when levels are low is:

Which structure of a neuron is primarily responsible for RECEIVING signals from other neurons?

Which neurotransmitter is most directly implicated in Parkinson's disease due to the degeneration of neurons in the substantia nigra that produce it?

The suprachiasmatic nucleus (SCN) of the hypothalamus plays a KEY role in:

In split-brain patients (whose corpus callosum has been severed), an image is flashed briefly to the LEFT visual field. The patient is then asked to identify what they saw. What is the typical result?

Which part of the neuron receives incoming signals from other neurons and carries them toward the cell body?

Action potentials follow the all-or-none principle. A researcher increases the intensity of a stimulus applied to a neuron well above threshold. Compared to a threshold-level stimulus, the action potential will:

The Weber-Fechner law describes the relationship between physical stimulus intensity and the resulting psychological perception. Which statement best captures this principle?

REM sleep is characterized by:

Identical (monozygotic) twins reared apart still show striking similarities in personality, intelligence, and certain mental health conditions. These findings provide evidence supporting: