Human Genetics Chapter 8 PT
_____ affect(s) thinking and causes delusions and hallucinations, usually beginning in young adulthood.
=A) Schizophrenia B) Eating disorders C) Mood disorders D) Sleep disorders
Twin and heritability studies of eating disorders indicate a ____ genetic contribution
=A) considerable B) low C) negative D) decreasing
Genes that regulate the neurotransmitter dopamine are the focus of research in which of the following?
=A) eating disorders B) depression C) bipolar disorder D) ADHD
Studies of interactions between hypocretin and orexin are associated with which of the following diseases?
=A) narcolepsy B) ADHD C) eating disorders D) FASPS
An individual with familial advanced sleep phase syndrome (FASPS) is likely to ____.
=A) promptly fall asleep at the same time each night B) fall asleep several times during the day C) also suffer from cataplexy D) have above average intelligence
Which of the following statements is true regarding behavioral traits and disorders?
A) Behavioral traits are not influenced by the environment. =B) Some genes are implicated in more than one behavioral disorder. C) Behavioral traits are never inherited. D) Behavioral disorders are usually influenced by only one gene.
Which of the following statements is true regarding IQ?
A) Environmental impact on IQ increases with age =B) A variant of a neural cellular adhesion molecule (N-CAM) gene correlates strongly with high IQ. C) Very few chromosomal disorders affect intelligence D) None of the above are true
___ has two identifying characteristics: tolerance and dependence.
A) Intelligence B) Depression C) Schizophrenia =D) Drug addiction
Which of the following statements is true regarding anorexia nervosa?
A) Only females suffer from this disorder =B) Anorexia has the highest risk of death of any psychiatric disorder C) Genes whose products control appetite are not implicated in eating disorders D) All of the above are true regarding anorexia nervosa
Which of the following statements is true in the U.S. population?
A) Phobias are less prevalent than schizophrenia. B) Attention deficit hyperactivity disorder is less prevalent than autism =C) Eating disorders are less prevalent than Alzheimer disease D) Drug addiction is less prevalent than eating disorders.
Which of the following statements is true regarding schizophrenia?
A) Schizophrenia is related to low levels of serotonin or norepinephrine B) Chromosome 4 has been implicated in the occurrence of schizophrenia C) Schizophrenia is sometimes misdiagnosed as autism =D) None of these statements is true regarding schizophrenia.
_____ describe(s) the onset of withdrawal symptoms upon stopping the use of the drug.
A) Tolerance B) Signal transduction C) Phobias =D) Dependence
True or False. There are no legal addictive drugs.
A) True =B) False
Alcoholism variants may be associated with the A1 allele of a ____ receptor gene.
A) apolipoprotein =B) dopamine C) leptin D) melanocortin-4
Major depressive disorder is ____.
A) associated with a single chromosomal site B) less common than bipolar disorder =C) likely caused by deficits of serotonin, norepinephrine, or both D) all of the above are true regarding major depressive disorders
Endorphins _____.
A) bind to receptors on human neurons B) are the human equivalent of opiates C) provide pain relief =D) All of the above are true regarding endorphins.
The genes for narcolepsy were first identified in ____.
A) cats =B) dogs C) humans D) fruit flies
Which of the following environmental factors may increase the risk of developing schizophrenia?
A) fetal oxygen deprivation B) herpes virus infection at birth C) traumatic brain injury in the mother =D) all of these
A genetic contribution to schizophrenia is suggested by the _____.
A) high heritability of this condition B) high concordance between identical twins =C) both a and b D) there is no evidence of a genetic influence
Because people tend to earn similar scores in all areas of IQ tests, psychologists hypothesized that a _____ must underlie the four basic skills that IQ encompasses.
A) neurotransmission =B) global intelligence ability (g) C) neuron variation D) test-taking skill
Behavioral disorders may result from mutations in genes affecting _____
A) neurotransmission B) signal transduction C) neuron variation =D) any of the above
Twin and adoptive studies suggest that the heritability of IQ ____.
A) stays the same through all age groups B) decreases with age =C) increases with age D) does not follow any particular trend
The cells that produce factors to support and nurture neurons are called ____.
A) synaptic cells =B) neuroglia C) neurotransmitter cells D) support cells
Tolerance describes _____.
A) the severity of withdrawal symptoms when a person stops taking a drug =B) the need to take more of a drug to achieve the same effects as time goes on C) the need to take less of a drug to achieve the same results D) a measure of the toxicity of a drug
The fatty sheath that coats the neuron extensions called axons is called _____.
A) the synapse =B) myelin C) a neurotransmitter D) myoglobin
