Human Sexual Response Flashcards
role of hormones in sex behavior
enhance it, do not cause it
females given androgens during gestation show…
decreased female behavior and increased male behavior
the “sex center” is located …
in the preoptic area of anterior hypothalamus
what is the result of lesions in the PON of the anterior hypothal (in terms of sex behavior)
will no longer exhibit sex behavior no matter what hormones you give the individual
**not yet shown in humans
what are the 2 main physiologic response in both men and women during sex?
myotonia (↑ tension, rhythmic contractions, rigidity)
vasocongestion (↑blood flow 2’ to vasorelaxation)
What are the 4 stages of sexual response
excitement/arousal, plateau, orgasm, resolution
what changes in the stages of sexual response occur in men as they age?
excitement phase gets longer
erection starts int the ___ phase and is maintained during the __ phase
excitation
plateau and orgasmic
erection is controlled by (sympathetics or parasympathetic) system
para
erection is caused by
increased blood blow:
- pelvic N carries parasymp impulses and causes vasodilation of arterioles
- ↑NOS activity → ↑NO/cGMP → vasodilatation
AND decreased venous drainage
the neuronal pathways that regulate erections are found in the
sacral spinal cors (S2-S4)
What part of the brain is involved in erection
lymbic system of cerebral cortex
What changes to the penis occur during plateau phase
cowers gland secretion
color deepens
testes increase in size and are elevated toward the abdomen
condition in which the penis or clitoris does not return to its flaccid state
priapism
ejaculation is coordinated by
lumbar spinal cord (L1-L2)
N that controls ejaculation
pudental
caused by rhythmic contractions of smooth muscle of the epidiymis, vas deferens, seminal vesicles and prostate
emission
accompanies the feeling of orgasm
ejaculation
retrograde ejaculaiton is prevented by
contraction of urethral (internal and external) sphincters
emission vs ejacultion
emission puts semen in the urethra and ejaculation shoots it out! pow! pow!
what changes occur to the breasts during sex?
nipple becomes erect and boobies get bigger
into what phase will the nipples stay erect/
thru plateau
changes to the vagina during excitement phasw
increased lubrication, expansion of vag (inc length and width), uterus elevates
changes to the vagina during plateau phase
vasocongestion causes narrowing of the vagina
“tenting effect” to help sperm get into uterus
changes going on during female orgasm
uterine contractions and rectal sphincter contraction
what is going on during the resolution phase in females
uterine contractions continue but with less force and at a lower frequency
differences in vagina during sex of a nulliparous and a parous woman
nulliparous can get semen pooling and this does not happen in parous (they have wastage of semen)
will retain semen in the vagina in a parous woman
orgasmic platform
what is the “problem” seen with sperm transport in the female reproductive tract
uterine contractions, oviduct contractions, and ciliary movement all push the semen out
most of the sperm are dead within ____ of being in the female
10 hrs
