Chapter 4 Pretest

Question 1

Epigenetics deals with how experiences can turn genes on and off. True or False?

Answer 1

True

Question 2

Twin studies of heritability have found that so-called identical (monozygotic) twins may be different in important ways. True or False?

Answer 2

True

Question 3

Kin selection – protecting those who are closely related to you – may provide an evolutionary explanation for altruism. True or False

Answer 3

True

Question 4

Studies of the human hippocampus suggest that, just as our bodies replace skin cells, we replace about 10% of neurons each year. True or False

Answer 4

False

Question 5

Axons make connections at random, but the connections that are not useful get pruned. True or False

Answer 5

False

Question 6

Neurotrophins control the survival of neurons in the brain. True or False

Answer 6

False

Question 7

Studies of professional musicians have found thicker gray matter in several cortical areas. True or False

Answer 7

True

Question 8

Adolescents show weaker responses in areas of the prefrontal cortex responsible for inhibiting behaviors. True or False

Answer 8

True

Question 9

When a mature mammalian brain is injured, there is a flurry of axons sprouting to replace damaged axons. True or False

Answer 9

False

Question 10

Phantom limbs develop when the relevant portion of the somatosensory cortex reorganizes and becomes responsive to alternative inputs. True or False

Answer 10

True