Why are scientists moving slowly regarding the therapeutic use of stem cells?
a. There are limited sources of stem cells.
b. Countries have been unable to come up with a universal policy for conducting such research.
c. Stem cells can migrate from where they were implanted into other tissues of the body.
d. All of the above
D
You might also like to view...
In DSM-5, clinical disorders are defined largely in terms of
a. compulsive behaviors b. symptomatic behaviors. c. necessity of inpatient therapy. d. comorbidity.
Maltreatment during childhood is associated with reduced volume of both the mid-sagittal area and hippocampus, two brain regions involved in ______.
A. learning B. memory C. intelligence D. both learning and memory
The learned ability to respond differently to various stimuli is known as
a. stimulus degeneralization. b. stimulus discrimination. c. positive transfer of responding. d. negative transfer of responding.
Which of the following is a brain difference that has been associated with an increased risk for addiction?
A. high activity in the insular cortex when preparing for a reward or loss B. reduced gray matter in parts of the temporal lobe involved in learning C. an increased P300 dip in event-related potential recordings following an unexpected stimulus D. brain patterns that have been associated with strong impulse control