Ch 10 Definitions: Sexual Behavior Flashcards

1
Q

X chromosome

A

one of the two types of chromosomes;

XX will usually develop into females

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2
Q

Y chromosome

A

one of two types of sex chromosomes;

XY will usually develop into males

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3
Q

karyotype

A

a profile of chromosome number and appearance
in the nucleus of a cell
as seen under a light microscope

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4
Q

Turner Syndrome

A

a condition caused by XO genotype,

characterized by frequent abnormalities of the ovaries and infertility

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5
Q

Klinefelter syndrome

A

a condition in males caused by XXY genotype,

characterized by frequent problems with fertility, secondary sex characteristics, and verbal skills

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6
Q

gonads

A

the internal organs, ovaries in females and testes in males,
that produce reproductive cells (eggs and sperm) and secrete sex hormones

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7
Q

external genitalia

A

the external sexual organs,
including the penis and scrotum in males
and the labia, clitoris, and lower third of vagina in females

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8
Q

intersex

A

a condition in which elements of both male and female development occur in the same fetus

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9
Q

ovaries

A

female gonads;

the source of ova and sex hormones

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10
Q

testes

A

male gonads;

source of sperm and sex hormones

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11
Q

sex-determining region of the Y chromosome (SRY)

A

a gene located on the short arm of the Y chromosome that encodes for testis-determining factor

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12
Q

testis-determining factor

A

a protein encoded by the SRY gene on the Y chromosome that turns the primordial gonads into testes

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13
Q

Müllerian system

A

the internal system that develops into a uterus, fallopian tubes, and upper 2/3 of the vagina in the absence of the anti-Müllerian hormone

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14
Q

Wolffian system

A

the internal system that develops into seminal vesicles, vas deferens, and prostate gland in males

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15
Q

testosterone

A

an androgen produced primarily in the testes

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16
Q

anti-Müllerian hormone

A

a hormone secreted by fetal testes that causes the degeneration of the Müllerian system

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17
Q

androgen

A

a steroid hormone that develops and maintains typically masculine characteristics

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18
Q

androgen insensitivity syndrome (AIS)

A

a condition in which a genetic male fetus lacks functional androgen receptors, which leads to the development of female external genitalia and typically female gender identity and sexual behavior

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19
Q

gender identity

A

the sense of being male or female, independent of genetic sex or physical appearance

20
Q

5-alpha-dihydrotestosterone

A

an androgen secreted by the testes that masculinizes the external genitalia

21
Q

congenital adrenal hyperplasia (CAH)

A

a condition in which a fetus is exposed to higher-than-normal androgens, resulting in masculinization of external genitalia and some cognitive behaviors in affected females

22
Q

secondary sex characteristics

A

characteristics related to sex that appear at puberty, including
deepening of the voice and facial hair growth in males
and widening hips and breast development in females

23
Q

estrogen

A

a steroid hormone that develops and maintains typical female characteristics

24
Q

estradiol

A

an estrogen hormone synthesized primarily in the ovaries

25
Q

gonadotropin-releasing hormone (GnRH)

A

a hormone released by the hypothalamus that stimulates the release of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) by the anterior pituitary gland

26
Q

follicle-stimulating hormone (FSH)

A

a hormone released by the anterior pituitary that stimulates the development of
eggs in the ovaries
and sperm in the testes

27
Q

luteinizing hormone (LH)

A

a hormone released by the anterior pituitary that signals
the male testes to produce testosterone
and that regulates the menstrual cycle in females

28
Q

5-alpha-reductase deficiency

A

a rare condition in which a child is born with ambiguous genitalia but develops male secondary sex characteristics at puberty

29
Q

organization

A

the permanent effects of sex hormones on body structures

30
Q

activation

A

reversible effects of sex hormones on body structures and functions

31
Q

Sexually dimorphic

A

structurally different in males and females

32
Q

otoacoustic emissions

A

sounds emitted by the cochlea of the inner ear that show sex differences

33
Q

sexually dimorphic nucleus of the preoptic area (SDN-POA)

A

a nucleus in the preoptic area of the hypothalamus that is larger in male rats than in female rats

34
Q

interstitial nuclei of the anterior hypothalamus

A

a collection of four small nuclei in the anterior hypothalamus, two of which
(INAH-2 and INAH-3)
appear to be sexually dimorphic

the size of INAH-3 might be associated with male sexual orientation

35
Q

spinal nucleus of the bulbocavernosus (SNB)

A

motor neurons in the spinal cord that innervate the male rat’s bulbocavernosus muscles in the penis

36
Q

transsexuality

A

having a gender identity that is inconsistent with biological sex

37
Q

sexual orientation

A

a stable pattern of attraction to members of a particular sex

38
Q

premenstrual syndrome

A

a condition in which some women experience physical and psychological symptoms immediately prior to the onset of menstruation

39
Q

premenstrual dysphoric disorder (PMDD)

A

a condition in which premenstrual mood changes are usually severe

40
Q

postpartum depression

A

a condition in which mothers who have recently given birth experience feelings of depression due to their rapidly changing hormonal environment

41
Q

estrus

A

a regularly occurring period of sexual desire and fertility in some mammals

42
Q

major histocompatibility complex (MHC) gene

A

a gene that encodes our immune system’s ability to recognize intruders;
might account for preferences for body odors

43
Q

oxytocin

A

a hormone, released by the posterior pituitary gland,
that stimulates uterine contractions, releases milk,
and participates in social bonding, including romantic love and parenting behavior

44
Q

monogamy

A

the custom of having one mate at a time or for life

45
Q

erectile dysfunction

A

the inability to achieve and maintain an erection long enough for satisfactory sexual activity