Sexual Behavior Flashcards
Lordosis
Female exhibiting hind limb strength to support male hurdle
Intromission
Process of inserting the penis into the vagina during sexual intercourse.
Sexual behavior DOG (male + female). discuss intercourse behavior as well . also dismount behavior
Pheromones present in the urine + secretions of anal glands and vulva
Soliciting behavior then run away (female)
Mounting (male), female will allow
Male penis cannot withdraw. copulatory lock.
rear to rear dismount
Female vagina contract while penis eject prostatic fluid
Sexual behavior (Ungulates). discuss male + female from prior to intercourse
(Horse)
Male:
- female in estrus release pheromone that is sensed by male nasopalatine duct. elicit freshmen response
-erection, mounting, intromission, ejaculation
Female
- Urine
- Mounting, female then male
- firm standing for mounting
Define : Nasopalatine
the organ congruent with the vomeronasal duct. responsive to pheromones.
After castration, males still express mounting behavior longer after intromission and ejaculation. why?
Motivational state (brain) sensory (generals)
If eliminate testosterone, how can you rescue full male reproductive behavior (PRIMATES)
Provide DHT + small amounts estradiol
For male. what is response to absence of testosterone ? when given androgen? what is role of androgen?
Male still have sexual behavior in absence of testosterone. When given androgens, male behavior increases in freq.
What is the man response to sexual encounter ?
-Acute androgen rise
-Uncoupling of frontal cortex from amygdala
=increased chance of risky behavior
What is name of stage when NON primate female expresses sexual behavior? what does this stage identify
Estrus. This is at time of ovulation.
Humans have no estrus !
What happens in terms of sexual behavior
when these females are ovariectomized
There is a prompt decrease int female RECEPTIVITY and PROCEPTIVITY.
Define Receptivity (libido)
Receiving a male
Proceptivity (libido)
Behavior that solicits male attention
What happens when estradiol given to ovariwctomized female
rescue of receptivity and proceptivity
How does estradiol change sexual attractiveness of female
Increase mixture of aromatic aliphatic acids produced from microbial action on the vaginal secretions
How does the vagina turn on/off sexual interest in male.
increased levels of PROGESTERONE can decrease sex-attractant properties of vaginal secretions.
Note that some males are oblivious to changes in odor
What are males attracted to in female? vice versa
Testosterone and estrogen
Postmenopausal women do not usual suffer complete loss of libido. Define libido
Libido is proceptivity and receptivity of female.
Define coital
Sexual intercourse
Give 4 stages of Human Sexual response
- excitement
- Plateau
- orgasm
- resolution (cum)
Explain the neuronal response in flaccid state. State whole pathway of each NT
Sympathetic Adrenergic neurons release NE , increases IP3»_space; Ca+ , increase SM contraction/ constriction.
Ca binds calmodulin, cross bridge formation between actin & myosin = tension
Explain the neuronal response in erect state. State whole pathway of each NT
parasymp. Cholinergic neuron release Ach= inhibit sympt. nueron. + increase cAMP, decrease Ca = no more tension
NO releasing neurons:
promote synthesis of cGMP 2nd messenger which promote uptake of Ca+ from cytosol (=decrease Ca).
Define erectile tissues + arteries in male
Corpus cavernosa , corpus spongiosum, smooth muscle layers of the arteriolar and arterial walls
Define sinusoid? How & why does play role in erection
The sinusoid is the cancerous tissue that fills with blood. fills from compression of venous plexuses and contraction of ischiocavernosus tissue.
=increase pressure and rigidity
Stages of ejaculation.
activation, neuronal, response
Emission:
stimulation of penis> sympathetic innversation= contraction of epididymis, vas deferens, bladder neck
=release SV into urthera
Ejaculation:
SV enter urethra> parasympathetic> activation of rhythmic contraction> blulbaurthra muscle, ischiocavernosus, pelvic floor muscle
= release SV out of urethra.
