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Sexual differentiation: Quiz


Question 1: The amount and distribution of body ________ differs between the sexes.
HairAbdominal hairBreastHuman skin

Question 2: In a male fetus, testes produce steroid and protein ________ essential for internal and external anatomic differentiation.
HormoneProgesteroneTestosteroneEndocrine system

Question 3: In females, in addition to breast differentiation, estrogen also widens the pelvis and increases the amount of body ________ in hips, thighs, buttocks, and breasts.
Fatty acidTrans fatFatLipid

Question 4: In the first weeks of life, a ________ has no anatomic or hormonal sex, and only a karyotype distinguishes male from female.
Prenatal developmentUmbilical veinEmbryologyFetus

Question 5: Male levels of testosterone directly induce growth of the penis, and indirectly (via DHT) the ________.
Reproductive systemTesticleProstateSeminal vesicle

Question 6: Early in fetal life, ________ migrate from structures known as yolk sacs to the genital ridge.
PubertyEmbryoGerm cellCell (biology)

Question 7: Visible differentiation occurs at puberty, when estradiol and other hormones cause ________ to develop in girls.
BreastPenisRectumFemale ejaculation

Question 8: This seems to be the case in humans as well; sex hormone levels in male and female fetuses and infants differ, and both ________ and estrogen receptors have been identified in brains.
Progesterone receptorGlucocorticoid receptorAndrogen receptorRetinoblastoma protein

Question 9: In males, testosterone directly increases size and mass of muscles, vocal cords, and ________, enhancing strength, deepening the voice, and changing the shape of the face and skeleton.
BoneHuman skeletonHuman skullHead and neck anatomy

Question 10: In some ________ and circumstances, other androgens may be present in high enough concentrations to cause partial or (rarely) complete masculinization of the external genitalia of a genetically female fetus.

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