PSY210 midter,

Growth Hormone

• Around 80% is secreted during sleep, in children and adolescents

• Secreted by the pituitary gland in the brain, brain to liver (this triggers the releases of other hormone somatomedin, which grows muscles and bone)

Epiphyses

The ends of a bone,

When end cartilage turns into bone before birth

Secular Growth

Changes in physical development from one generation to the other

Cephalocaudal

Head to tail( general neuronal maturation from head to tail)

Proximodistal

Close in to further out.

(Maturation from the center of the body to the extremities

primary sex characteristics,

Sexual maturation includes changes in which refer to organs that are directly involved in reproduction.

secondary sex characteristics

Sexual maturation also includes changes in which are physical signs of maturity that are not linked directly to the reproductive organs.

For girls

puberty begins with the growth of the breasts and the growth spurt, followed by the appearance of pubic hair

Menarche

the onset of menstruation, typically occurs at about age 13

For boys

puberty usually commences with the growth of the testes and scrotum, followed by the appearance of pubic hair, the start of the growth spurt, and growth of the penis

Supermarche

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