Question 1

The development of primary sex characteristics (egg maturation and sperm production) are found on which side of the HPG axis?

Accepted Answer

Gonadarche refers to the maturation of the gonads (ovaries and testes), which is responsible for the development of primary sex characteristics like egg maturation and sperm production, as part of the hypothalamic-pituitary-gonadal (HPG) axis.

Question 2

What two factors are thought to relate to the secular trend?

Accepted Answer

Improved nutrition and overall health are considered key factors in the secular trend, which refers to the long-term pattern of growth and development changes observed in populations over time.

Question 3

The adolescent growth spurt peaks around age ________ for girls and ________ for boys.

Accepted Answer

The adolescent growth spurt typically peaks around age 12 for girls and age 14 for boys, as girls generally begin puberty earlier than boys.

Question 4

Patrick is 16 years old and beginning to experience his first growth spurt as an adolescent. This means he is

Accepted Answer

Patrick is 16 years old and beginning to experience his first growth spurt as an adolescent. This means he is experiencing late maturation.

Question 5

Who is most likely to be going through their peak growth spurt?

Accepted Answer

Girls typically experience their peak growth spurt around ages 11-13, so 12-year-old Lily is most likely going through hers.

Question 6

Because puberty leads to a number of rapid physical changes, it also may also influence a teen's body image. In particular, _________ tend to add muscle mass and height and become more satisfied with their bodies, while ________ tend to add more fat tissue and become less satisfied with their bodies.

Accepted Answer

During puberty, boys typically gain muscle mass and height, which often leads to increased body satisfaction. In contrast, girls tend to gain more fat tissue, which can lead to decreased body satisfaction.

Question 7

Which of the following statements is FALSE concerning early-maturing girls?

Accepted Answer

Early-maturing girls often face challenges such as increased peer pressure and emotional stress, which can negatively impact their academic performance, making it less likely for them to do well in school.

Question 8

Which of the following statements is FALSE concerning early-maturing boys?

Accepted Answer

Early-maturing boys often affiliate with older adolescents, not younger ones, as they are perceived as more mature and may engage in activities typical of older age groups.

Question 9

It is becoming more and more noticeable to Dierdre's sixth-grade class that she is entering puberty at an earlier age than most of her age mates. Based on research examining early maturation, Dierdre may be likely to

Accepted Answer

Research indicates that early maturation in girls is often associated with an increased risk for substance abuse, as well as other challenges such as lower self-esteem and higher levels of stress.

Question 10

Tomek seems to be gaining muscle and going through puberty at an earlier age than most of the other boys in his sixth-grade class. Based on research examining early maturation, Tomek may be likely to

Accepted Answer

Early maturing boys may experience emotional and social challenges, such as feeling hostility and distress, due to the mismatch between their physical development and emotional maturity.

Question 11

The process in which fatty deposits in the brain insulate axons is called

Accepted Answer

Myelination is the process where fatty deposits, known as myelin, form around axons in the brain, insulating them and increasing the speed of electrical communication between neurons.

Question 12

Which of the following biological changes occurs in the brain during adolescence?

Accepted Answer

During adolescence, the brain undergoes significant changes including synaptogenesis (formation of new synapses), myelination (increased insulation of nerve fibers), and synaptic pruning (elimination of excess synapses).

Question 13

As with other aspects of physical development, _________ tend to show decreases in gray matter (due to synaptic pruning) earlier than _________.

Accepted Answer

Girls tend to show decreases in gray matter earlier than boys due to synaptic pruning, which is a part of brain development.

Question 14

The processes of myelination, synaptogenesis, and synaptic pruning are especially evident in which area of the brain?

Accepted Answer

The prefrontal cortex undergoes significant development during childhood and adolescence, involving myelination, synaptogenesis, and synaptic pruning, which are crucial for cognitive functions such as decision-making and impulse control.

Question 15

Baird and colleagues' (1999) study examining facial expressions and emotions found that

Accepted Answer

The study by Baird and colleagues (1999) found that adults had more activity in their frontal lobes, which are associated with rational thought, while adolescents had more activity in their amygdalas, which are linked to emotional processing.

Question 16

The amygdala is the area of the brain associated with ________, and the frontal lobe is the area of brain associated with ________.

Accepted Answer

The amygdala is primarily involved in processing emotions, while the frontal lobe is associated with rational thinking and decision-making.

Question 17

In addition to the prefrontal cortex and amygdala, there is also evidence that new neurons are formed throughout adolescence and into adulthood in areas such as the ___________, which is heavily involved in storing memory of facts and relations between places and events.

Accepted Answer

The hippocampus is known for its role in forming new memories and spatial navigation, and it is one of the areas where neurogenesis occurs throughout life.

Question 18

During adolescence, changes in the levels of dopamine make adolescents less responsive to rewards. As a result, they may

Accepted Answer

During adolescence, the changes in dopamine levels can lead to increased risk-taking behavior as adolescents seek out more novel and engaging stimuli to achieve the same level of reward response.

Question 19

Which of the following brain changes contributes to an increase in impulsive behavior during adolescence?

Accepted Answer

All of the listed factors contribute to increased impulsive behavior during adolescence: the prefrontal cortex is still maturing, connections between it and the limbic system are not fully developed, and neurotransmitter levels are changing.

Question 20

Data from national surveys indicate that nearly ________ of adolescents have had sex by high school graduation.

Accepted Answer

National surveys indicate that nearly two-thirds of adolescents have had sex by the time they graduate from high school.

Quiz 13: Physical Development in Adolescence