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