Deck 5: Male Reproductive Behavior

Question 1

In parthenogenic whiptail lizards, "male" sex behavior is exhibited to

A) increase the fertility of recipient of this behavior.
B) decrease boredom and make fun of sexually reproducing species.
C) allow sexual selection to occur.
D) None of the above

Answer 1

A

Question 2

In the context of alternative male mating strategies, a "sneaker" male is a

A) species of snake that has a hemipenis.
B) female that leaves the nest at night to copulate with the dominant male.
C) male that has muted coloration, often with immature or female characteristics, that sneaks to mate with females rather than directly competing with other males.
D) male that has sexually selected brightly colored feet that attract the female's attention.

Answer 2

C

Question 3

The POA (preoptic area) is necessary for

A) circadian rhythms.
B) male sexual behavior.
C) female sexual behavior.
D) pre-visual acuity.

Answer 3

B

Question 4

Which hormone(s) will reinstate sexual behavior (i.e., sniffing, mounting, intromission) in the male rat following castration?

A) Testosterone
B) Estradiol
C) Dihydrotestosterone (DHT)
D) Both a and b

Question 5

Erection and ejaculation in the male rat must be controlled by the _______ because _______.

A) olfactory system; lesions eliminate sexual behavior
B) amygdala; lesions eliminate sexual behavior
C) spinal cord; transection eliminates erections and ejaculations
D) spinal cord; transection does not eliminate erections and ejaculations

Question 6

Male red-sided garter snakes mate

A) immediately after hibernation, when their testes are regressed and androgen levels are low.
B) approximately six weeks after emerging from hibernation, thus allowing time for sperm to mature.
C) monogamously with a female.
D) with a female only when she is ovulating.

Question 7

Erection of the human male penis is controlled by the

A) parasympathetic nervous system.
B) flow of blood into the corpora cavernosa and corpus spongiosum.
C) bulbocavernosus and ischiocavernosus muscles.
D) Both a and b

Question 8

Which statement is most likely true?

A) Oxytocin release during orgasm may promote sexual satiety.
B) The parasympathetic nervous system controls ejaculation.
C) The sympathetic nervous system controls human male penile erection.
D) Testosterone is necessary for human male penile erection.

Question 9

What are the two phases of male reproductive behaviors?

A) Appetitive and consummatory
B) Cognitive and consummatory
C) Appetitive and conducive
D) Attachment and consummatory

Question 10

Which of the following is not a component of the consummatory phase during male rodent sexual behavior?

A) Mounting
B) Courtship
C) Ejaculation
D) Intromission

Question 11

Which behavior is not interrupted by lesions of the MPOA?

A) Thermoregulatory behavior
B) Locomotor behavior
C) Drinking
D) Territorial behavior

Question 12

Which region is essential for male mating behavior?

A) POA
B) VMN
C) AN
D) CTN

Question 13

In human males, which statement is true?

A) Hormones have no effect on sexual motivation or performance.
B) Although not necessary, hormones can have pronounced effects on sexual motivation.
C) Hypogonadal men will never copulate or obtain an erection.
D) Male sex offenders generally have high testosterone and regressed gonads.

Question 14

A castrated male rat that continues to copulate likely has high concentrations of the neurotransmitter _______ present in the MPOA.

A) serotonin
B) dopamine
C) endorphin
D) norepinephrine

Question 15

In birds, androgens are converted into estrogens in the __________ to mediate copulatory behavior.

A) preoptic medial nucleus (POM)
B) lateral geniculate nucleus (LGN)
C) area X
D) lateral amygdala (LA)

Question 16

Individual differences in the frequency of human and rodent sexual behavior are correlated with blood levels of androgens.

A) True
B) False

Question 17

During restoration of sex behavior in castrated male rodents, what is the order of appearance of behavior?

Question 18

List two neural sites involved in the regulation of male sex behavior.

Question 19

Define the appetitive versus consummatory phases of male sexual behavior.

Question 20

How does a lesion of the preoptic area (POA) affect male sexual behavior?

Question 21

List and describe the three components of male rodent sexual behavior.

Question 22

Compare and contrast the role of gonadal hormones in the mediation of copulatory behavior in a male rodent and male primate of your choice.

Question 23

Describe the use of optogenetic stimulation in studies of male sexual behavior.

Question 24

In humans, is male sexual behavior (including motivation and performance) dependent on testosterone? What is the evidence for or against your contention?

Question 25

What are immediate early genes? Explain how they have been used to study the neural circuitry of male sexual behavior.