Test 5 Flashcards
(104 cards)
______________ began at age 15 and lasted a few months
adolescence 100 years ago
____________ now lasts a decade or more
adolescence
______________ is when separate period of development has now been identified
emerging adulthood
What is the age of puberty?
8-14
How long does puberty typically last?
3-5 years
after puberty, many more years are required to achieve this
psychosocial maturity
__________ is when puberty begins before age 8 and happens between 1 and 5000 people
precocoius puberty
signaling that ovulation has begun
menarche
pregnancy is biologically possible, but ovulation and menstruation are often irregular for how long?
4 years after menarche
what is the average age of menarche for normal-weight girls
12.5 years
____________ is boys first ejaculation
spermarche
How early can erection occur?
infancy
____________ signals sperm production
ejaculation
What is the average age for spermarche?
just under 13
_______________ is the paired sex glands (ovaries in females, testicles in males).
gonads
What do gonads produce?
hormones and gametes
________ is a sex hormone, considered the chief estrogen.
estradiol
____________ is a sex hormone, best known of the androgens
testosterone
__________ is when a day-night cycle of biological activity occurs approximately every 24 hours
circadian rhythem
__________ cause a phase delay in sleep-wake cycles
hormones
what work together to make teens increasingly sleep-deprived with each year of high school
biology (circadian rhythms) and culture (parties and technology)
What are the reason for variation?
- genes
- gender
- secular trend
- fat
- stress
_____________ account for about 2/3 of variation in age of puberty
genes
what have a marked effect on age of puberty onset
genes on the sex chromosome