PSYC 370 Brain and Behaviour II Sex and Hormones
Questions With Complete Solutions
As far as genitals, what is the difference between partial and
complete AIS? Correct Answer Female (Complete) or
ambiguous (partial)
How do the female external genitals develop? Correct Answer
Absence of testosterone, develops into clit, labia and vagina
opening
How do the male external genital develop? Correct Answer
Gonadal testosterone metabolized to DHT which induces the
development of the scrotum and penis
How do the Mullerian ducts develop? Correct Answer
Hormones aren't needed. There is not mullerian inhibiting
substance, so they develop and the wolffian ducts degenerate in
the absence of testosterone
How do the wolffian ducts develop? Correct Answer Need
tesiticular hormones. Mullerian inhibiting substance inhibits the
development of the M ducts, which shrink and degenerate.
Androgens cause the development of the Wolffian ducts
How do we know that the VMH is implicated in female sexual
behaviours? Correct Answer • VMH lesions block lordosis
• Electrical stimulation of VMH facilitates lordosis •
Ovariectomy reduces female sexual behavior
, - restored when estrogen and progesterone are placed directly
into the VMH
• VMH neurons are active during copulation - indexed by
increased c-fos in VMH
What are activation effects of hormones on sexual development?
Correct Answer Activation of reproduction-related responses in
mature individuals
What are female rodent indicators of receptivity? Correct
Answer Lordosis
What are male-type behaviours in rodents? Correct Answer
Mounts
Intromission
Pelvic thrusting
Ejaculation
Post-ejaculatory refractory period
What are organizational effects of hormones on sexual
development? Correct Answer Influence development of
anatomical and physiological characteristics that differentiate
the sexes
occur primarily during prenatal development
What are primary sex characterisitics? Correct Answer
Gonads, internal sex organs, external genitalia
Questions With Complete Solutions
As far as genitals, what is the difference between partial and
complete AIS? Correct Answer Female (Complete) or
ambiguous (partial)
How do the female external genitals develop? Correct Answer
Absence of testosterone, develops into clit, labia and vagina
opening
How do the male external genital develop? Correct Answer
Gonadal testosterone metabolized to DHT which induces the
development of the scrotum and penis
How do the Mullerian ducts develop? Correct Answer
Hormones aren't needed. There is not mullerian inhibiting
substance, so they develop and the wolffian ducts degenerate in
the absence of testosterone
How do the wolffian ducts develop? Correct Answer Need
tesiticular hormones. Mullerian inhibiting substance inhibits the
development of the M ducts, which shrink and degenerate.
Androgens cause the development of the Wolffian ducts
How do we know that the VMH is implicated in female sexual
behaviours? Correct Answer • VMH lesions block lordosis
• Electrical stimulation of VMH facilitates lordosis •
Ovariectomy reduces female sexual behavior
, - restored when estrogen and progesterone are placed directly
into the VMH
• VMH neurons are active during copulation - indexed by
increased c-fos in VMH
What are activation effects of hormones on sexual development?
Correct Answer Activation of reproduction-related responses in
mature individuals
What are female rodent indicators of receptivity? Correct
Answer Lordosis
What are male-type behaviours in rodents? Correct Answer
Mounts
Intromission
Pelvic thrusting
Ejaculation
Post-ejaculatory refractory period
What are organizational effects of hormones on sexual
development? Correct Answer Influence development of
anatomical and physiological characteristics that differentiate
the sexes
occur primarily during prenatal development
What are primary sex characterisitics? Correct Answer
Gonads, internal sex organs, external genitalia
