how many chromosomes do we have?
we have 23 pairs, 23rd pair it the sex chromosome.
XX-female XY- male
who determines the gender of a child?
having both female and male gonadal systems, NO human can be this.
internal sex organs
each embryo has both male and female internal sex organs, but once it develops one system the other disappears.
male systems; containing the epididymis, vas deferens, and seminal vesicles.
uterus, fallopian tubes, inner 1/3 of the vaginal canal.
external sex organs
when the sex tissue becomes either the female or male genitalia
secondary sex traits
body hair, breast development, muscle mass, fat deposition, proceed later in life during puberty.
are sex sex hormones and are structurally related to other steroids hormones produced by the body, made from cholesterol and are INSIDE the cell.
male sex hormone
female sex hormone
slat/water balance regualting hormone
as children they have reduced muslces strength, as they mature they are often taller than average, thin and less muscle, are infertile. Lower intelligence, speech problems.
X only. femaels
Shorter than average, infertile, extra skin on neck, side nipple, swelling of hands and feet. Normal intelligence, problem with math, memory.
Androgen Insensitivity Syndrome
XY male develops as a female, due to inoperative testosterone receptors. No uterus, no fallopian tubes, or deep third vaginal canal. Not noticeable until they hit puberty.
XY, Rare, only in Dominican Republic, New Guinea, Turkey.
Are born males but are born with external genitalia of females, however once they hit puberty the amount of testosterone they begin to develop the testes. `
death of neurons
where theenriched rats brain increased in size
"Stage theory of childhood cognitive development" 4 stages
the child interaction with the world and build a set of concepts about how it works, child doesn't know the physical object remain in existence, even when out of sight.
doesn't think abstractly and needs concrete examples and phsyical situation. Difficulty taking views points of others.
child start to conceptualize, creating logic. Abstract problem solving appears.
age 11 and up
child's cognitive are those of an adult and include advance conceptual reasoning.
emotional traits that organize the childs view of the world.
when do children begin to smile (even the blind)
when do children feel secure enough to interact with other children, even in the absence of their parents?
where infant cries and refused to consoled by others
where infant is sad and unresponsive
infant intentionally disregards and avoid the parent if the parent returns