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Terms in this set (21)
when does the average male begin puberty?
9-13 and 1/2
how long does male puberty last?
whats the first most noticeable change in males during puberty?
a boys' testicles begin to grow.
several months after the first sign of puberty, what begins to rise and what is the result in the rising figure?
testosterone; the hormone allows the penis and scrotum to grow
when does the penis stop growing?
at about 18 years of age
Promotes maturation of the testes and secondary sexual characteristics; It promotes muscle growth, hair growth, and deepening of the voice.
chemistry of testosterone
testosterone is part of a group of organic compounds known as steroids.
what can misusage of anabolic steroids do to a human body?
Steroid abuse can cause a variety of health problems, such as cancer, liver damage, and even the growth of breasts in men.
anabolic (building up) + steroids (natural compound)
artificially produced hormones
Follicle-stimulating hormone (FSH).
Stimulates the testes to produce sperm cells
Luteinizing hormone (LH).
Stimulates the testes to produce more testosterone
Gonadotropin-releasing hormone (GnRH).
Stimulates the production of FSH and LH
pubic hair starts to grow above the base of the penis after a boys genitals begin to grow. over the next few years the hair spreads and becomes dense to surround the genitalia. after it spreads to the thighs and upwards to the belly button.
Facial and Body Hair
after the first signs if pubic hair facial hair begins to grow. an increase in the amount and thickness of hair on the back, arms, legs, buttocks, and underarms will gradually grow.
Hair under the arms.
voice box; passageway for air moving from pharynx to trachea; contains vocal cords
hormones signal the larynx (in both males and females) to enlarge. It's simple physics: The larger the voice box grows and the thicker the vocal cords, the lower the voice goes. This stage of puberty usually begins months or even years before the appearance of facial hair and about the time of peak growth in overall height.
boys growth spurt
- start later; last longer
- start age 12.5
1. long legs, broad shoulders
2. gain more muscle, aerobic efficiency
how much taller is the average male compared to an average female?
about 4 inches taller
In males, hands and feet begin to grow first, then arms and legs, and finally, a lengthening of the spine ends the growth process. On average, most young men reach maximum height by 17.5 years of age.
end of puberty
When a male has completed puberty, his bones are heavier than those of a woman, and he has up to twice the muscle mass. Shoulders have widened, jaws are larger; in short, when puberty ends, boys look like men. But most importantly from a biological point of view, puberty has enabled young men to participate in reproduction.
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