Question : 11.Why it that the brain of an adolescent becomes capable : 1245395

11.Why is it that the brain of an adolescent becomes capable of processing information more efficiently than the brain of a child?

a.Because the brain has grown to its adult size by the time puberty occurs.

b.Because synaptic pruning begins to take place in adolescence.

c.Because not all of the cerebral lobes were “active” before puberty, but they are all working in adolescence.

d.Because the corpus callosum, a structure which used to block messages from going between the two cerebral hemispheres, atrophies and disappears during adolescence.

12.Which of the following individuals has just experienced menarche?

a.Mona, who has started developing breasts.

b.Gaspar, who recently experienced his first ejaculation of semen.

c.Lisa, who recently experienced her first menstrual cycle.

d.Johnny, whose testicles have enlarged and descended.

13.At about age ____, most boys reach spermarche, which is the first spontaneous ejaculation of sperm-laden fluid.

a.9c.13

b.11d.15

14.Pubertal changes that are related to reproduction are to ________ as pubertal changes that are not directly linked to the reproductive organs are to ________.

a.adrenal maturatives; pituitary maturatives

b.primary sexual characteristics; secondary sexual characteristics

c.pituitary maturatives; adrenal maturatives

d.secondary sexual characteristics; primary sexual characteristics

15.Young Tiffany is just starting puberty, and there are several changes occurring in her body. Which of the following would be an example of change in a secondary sexual characteristic?

a.development of her ovariesc.development of her vagina

b.development of her breastsd.development of her uterus

16.Which of the following is an accurate differentiation between a young man’s initial and later ejaculations?

a.Initial ejaculations contain relatively few sperm, while later ejaculations contain enough sperm to fertilize an egg.

b.Initial ejaculations only occur during sleep (nocturnal emissions) while later ejaculations can occur either while sleeping or awake.

c.Initial ejaculations contain no sperm cells, while later ejaculations (typically starting around 15 years of age) do contain sperm cells.

d.Initial ejaculations contain a high content of urine combined with semen, while later ejaculations are almost exclusively semen.

17.The key player in the physical changes that are experienced as puberty begins is the

a.pituitary gland.c.gonads (testes or ovaries).

b.adrenal gland.d.thalamus.

18.Which of the following chemicals, when released in the body, will initiate the biochemical changes that produce body hair?

a.phytogensc.androgens

b.prolactinsd.estrogens

19.Which of the following statements is the most accurate with regard to the timing of the onset of puberty in youngsters?

a.The timing of puberty is regulated by environmental forces, but these environmental forces are strongly influenced by genetics.

b.Puberty is something that is uniquely determined by environmental factors, and genetics play no part in when these changes emerge.

c.The timing of puberty is regulated by genetics, but these genetic forces are strongly influenced by environmental factors.

d.Puberty is something that is uniquely determined by genetics, and environmental influences play no part in when these changes emerge.

20.Which statement is true?

a.Estrogen is found only in females, and androgens are found only in males.

b.Estrogen is found only in males, and androgens are found only in females.

c.During puberty, estrogen and androgens are released at the same levels in adolescent males and females.

d.During puberty, estrogen and androgens are released at different levels in adolescent males and females.