PsychCh4

The sequence in which the fastest groth occurs at the top of the body--the head--with physical growth in size, weight, and feature differentiation gradually working from top to bottom.

The sequence in which growth starts at the center of the body and moves toward the extremities.

A period of rapid physical maturation involving hormonal and bodily changes that take place primarily in early adolescence.

A girl's first menstruation

Very early onset and rapid progression of puberty.

Powerful chemical substances secreted by the endocrine glands and carried through the body by the bloodstream.

the main class of male sex hormones

The main class of female sex hormones

An androgen that is a key hormone in a boys' pubertal development

An estrogen that is a key hormone in girls' pubertal development

Specialization of functions in one hemisphere of the crebral cortex or the other

Brain area where fibers connect the brain's left and right hemispheres.

The highest level of the frontal lobes that is involved in reasoning, decision making, and self-control

The seat of emotions in the brain.

A condition that occurs when an infant stops breathing, usually during the night, and suddenly dies without an apparent cause.

Severe malnutrition caused by an insufficient protein-calorie intake, resulting in a shrunken, elderly appearance.

Severe malnutrition caused by a protein-deficient diet, causing the feet and abdomen to swell with water.