Which of the following is true of sex chromosomes?
Factors coded on the Y chromosome control the development of the male sex glands
The Y chromosome contains the blueprint for the female foetus
The sex chromosomes are the largest among the 23 pairs
The mother donates her Y chromosome to form a male foetus
________ exert(s) a defeminising action during prenatal development
Testosterone
Anti-Müllerian hormone
Estradiol
Androgens
The size of the bed nucleus of the stria terminalis is an indicator of
Prenatal androgenisation
Sexual orientation
Ambivalent sexuality
Gender identity
The key factor that determines whether the undifferentiated gonads develop into testes is
The SRY gene located on the Y chromosome
The secretion of testosterone from the adrenal glands
The SRY gene located on the X chromosome
The secretion of androgens from the gonads
A pheromone is a
Chemical located on the tongue that detects sugar
Chemical that is released by one animal that affects the behaviour of another animal
Type of enzyme that deactivates cyclic nucleotides
Chemical that is released in the body that affects the behaviour of the individual that released it
Which of the following is true of pheromone action in humans?
Menstrual cycles are delayed by exposure to human sweat
Women are attracted to the underarm sweat from men
Men prefer the smell of t-shirts worn by women during their fertile phase
Men and women show decreased sexual behaviour after exposure to pheromones
A hormone that promotes the prenatal development of the Wolffian system is said to have a(n)
Defeminising effect
Activational effect
Masculinising effect
Feminising effect
The prenatal development of the internal reproductive structures of the female
Requires the suppression of the Müllerian system by the anti- Müllerian hormone
Requires secretion of estradiol by the pituitary gland
Is caused by secretion of progesterone
Requires no hormone
The genetic sex of a foetus is determined by
The hormones released by the pituitary gland during foetal development
A single gene on the X chromosome
The gonads
The sex chromosomes inherited from the father
The key event that starts sexual maturation at the onset of puberty is that
The ovaries and testes release gonadotropic hormones
Estradiol and testosterone are released from the hypothalamus
The hypothalamus secretes gonadotropin-releasing hormones
LH and FSH are released from the hypothalamus
Which of the following is known to speed up the onset of female puberty
Low levels of body fat
High plasma levels of leptin
Malnutrition
High plasma levels of Estradiol
An increased prevalence of homosexuality/bisexuality is noted in
Women with congenital adrenal hyperplasia
Women with Turner’s Syndrome
Men born during the late winter months to stressed mothers
Men born with congenital adrenal hyperplasia
The key effect of luteinising hormone (LH) is to:
Stimulate beard growth
Impair the growth of ovarian follicles
Induce ovulation
Guide the implantation of the fertilised ovum
A human female is more likely to initiate sexual activity with her partner
Just prior to menstruation
When estradiol levels are lowest
Just after a surge of testosterone from her adrenal glands
At a point in the menstrual cycle when estradiol levels are highest
The ________________ would not be considered a human sex organ
Ovaries
Adrenal gland
Testes
External genitalia
