Male Reproductive Behavior Flashcards
Exam 2
what is the underlying causes of behavior are competing intrinsic drives or motivations
drive theory
what is the drive theory supported by
animal models in which sex drive could be reduced with castration and restored with androgens
males have evolved to maximize what?
reproductive fitness
number of possible offspring produced in a given breeding season
potential rate of reproduction
do males of females have a higher PRR
males
time and energy invested in the production and care of offspring; subdivided into mating effort and parental care
parental investment
do males or females invest more in mating effort
males
do males or females invest more in parental care
females
ratio of males to females available to mate at any given time
operational sex ratio
differences in what lead to males being competitive and females being choosy
OSR
what regulates the production of male gametes
H-P-G axis
hypothalamus-> blank-> blank
anterior pit
testes
GnRH-> blank-> blank
LH, FSH
T,E, and DHT
sperm production is
constant
Seven Up means
Seminiferous tubules
epididymis
vas deferens
ejaculatory duct
nothing here
urethra
penis
male sex behavior begins after what when testes become active
puberty
removal of testes does what
dampens or removes male sex behavior
inference: hormones responsible for regulating spermatogeneis could also regulate
male sex behavior
rodent sex behavior can be divided into two categories
appetitive and consummatory phase
motivation; libido; courtship; all behaviors males use to gain access to females
appetitve phase
copulation; performance; behaviors directly involved in joining sperm and egg
consummatory phase
penis becoming engorged and enlagred
erection
male assuming a copulatory position
mounting
penis entering the vagina during a mount
intromission
expulsion of semen from the male’s body
ejaculation
erection, mounting, intromission, ejaculation is part of what phase
consummatory phase
in the experiment: male rats castrated as adults and treated as follows
what reverses effects of castration on performance in rats
DHT
in the experiment: male rats castrated as adults and treated as follows
what reverses effects of castration on motivation in rats
E
in the experiment: male rats castrated as adults and treated as follows
it appears that both what are required for full male sex behavior
androgens (T and DHT) and estrogens
behavior is mediated by
the cns
what are the 4 regions of the brain involved in male sex behavior
preoptic area
olfactory bulbs
vomeronsal organ
amygdala
the poa is critical for what?
integrating environmental, physiological and physiological information prior to and during copulation
in virtually all species, lesions of the POA in adult males eliminates
sexual performance
implants of what into the poa of castrated males restores what?
T
copulation
what senses chemosensory cues; nerves lead to olfactory bulbs
vomeronasal organ
the amygdala receives projections from the main and acessory what?
olfactory bulbs
what is critical for integrating sensory info important for sex behavior
amygdala
neurotransmitter implicated in neural circuitry or arousal, reward, and motivation
dopamine
dopamine increases in the what? during and after copulation
POA
what modulates hormone-behavior interactions
social context
what is the most important social context for male sex behavior
estrous females
males do not respond to
non-estrous females
males respond less to females who
artificially brought into estrous
the coolidge effect (3)
- male rats will mate to satierty with a female over many hours
- once satiated, males will no longer copulate
- unless given a novel females, when males immediately being copulation again
