Looking at the concordance rates for autism found in twin studies and family studies, Newschaffer and colleagues (2007) believe that autism is primarily the result of ____
a. genetic factors
b. genetic and environmental factors
c. environmental factors
d. sociocultural factors
B
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Janine is trying to quit smoking because she knows it can have multiple negative effects on the embryo and fetus. Explain how cigarette smoking can slow fetal growth, leading to low-birth-weight babies.
What will be an ideal response?
When Jillian was two years old, her mother was discouraged that she would not sit through story hour. Now that she is in kindergarten, Jillian pays close attention to her teacher. What developmental process of the brain contributed to Jillian's change in behavior?
A. neuronal proliferation B. increased myelination C. dendritic arborization D. neurotransmitter synthesis
The process of synaptic pruning occurs most often __________
a. during early childhood into adolescence b. during mid-late adolescence and into adulthood c. after steep increases in synaptic density during toddlerhood and early adolescence d. during toddlerhood and in late adulthood
Remembering what dopamine does in the brain is an example of ______.
A. declarative memory B. nondeclarative memory C. short-term memory D. dendritic memory