Chapter 6 Flashcards
(21 cards)
Females exhibit greater selectivity than males in
mating-partner choice
During breeding seasons, male vertebrates are capable of
sexual behavior all the time
During breeding seasons, male vertebrates are capable of sexual behavior all the time.In contrast, females exhibit
great fluctuations in sexual behavior
Estrus and anestrus
Female can be both estrus and anestrus : when ready to mate female is estrus, the rest of the time the female is anestrus, estrus females are more attracted to males than when they are anestrus: estrus spend more time near and loocking for males than anestrus
Females find males more attractive when in
estrus
Males find females in __ more attractive than __ females
Males find females in estrus more attractive than anestrus females
Males prefer to mount
estrus females
Only __ females will permit mating to take place
estrus
__ are involved in expression of estrous behaviour in rats and dogs
the ovaries
Ovaries are the main source of estrogen + progesterone: impact on periphery but also on CNS
in females, hormones associated with __ maturation affect nervous system underlying mating behaviour
Hormones associated with ova maturation affect nervous system underlying mating behavior
(Hormones associated with ova maturation affect nervous system underlying mating behavior)
length estrous cycle
4 or 5 days
estrous cycle can be divided into 3 stages:
Diestrus (48 h)
Vaginal Proestrus (12 h)
Vaginal Estrous (36h)
length of diestrous component of estrous cycle
about 48h
what happens during diestrus 1
follicles are developped
what characterizes Diestrus 2:
Fully developed egg with granulosa and theca cells: but not released
what is the length of vaginal proestrus
12h
what happens during vaginal proestrous
This is when ovulation occurs and egg is released into fallopian tube
what is the length of vaginal estrous
about 36h
what happens during vaginal estrous
The corpea luteum (remainder of follicle after egg was released)
This structure can further develop if there is further copulation
If there is no copulation will degrade
Corpus luteum is important in secreting progesterons and plays a role into implantation of egg into uterine wall
The female is ready to mate at which stage of estrous cycle
vaginal estrous
