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16 Cards in this Set

  • Front
  • Back
In humans, differentiation of gonads into male testes or female ovaries begins ______ to ______ weeks after conception
6-8
For a male fetus to develop male genitalia, the fetus must be stimulated by _________ during the critical period of development.
androgen
Research using brain imaging techniques has confirmed that the brain is sexually ____________.
dimorphic-(sex related differences in several brain structures)
At puberty, an increase in sex hormones influences the emergence of the ____________ sex characteristics.
secondary
The emergence of secondary sex characteristics is mediated by the __________________.
hypothalamic-pituitary-gonadal axis
Hormone replacement therapy affects estrogen levels or a combination of _________ and _______ is effective for alleviating hot flashes, mood swings, and vaginal dryness.
estrogen and progesterone
Sleep is divided into _ stages. During stage 1, _____ waves are replaced by theta waves.
5
alpha
In stage 2, _____ waves predominate but are interrupted by bursts of ______ and _____.
Theta
sleep spindles
k complexes
During stage 3, large slow _____ waves appear
Delta
During stage 4 _________ waves predominate EEg.
Delta
Stage ____ and ___ are referred to as "slow wave sleep."
3 and 4
The 5th sleep stage is characterized by _______ and is known as _____ sleep.
Rapid Eye Movements
REM
Sleepers typically pass through all five stages every ____ minutes.
90-100
In newborns _____ sleep precedes _______ sleep and takes up _______% of total sleep time.
REM
NREM
50
In adults REM sleep accounts for __% of sleep time
20
REM sleep deprivation is usually followed by a REM _____.
rebound