23 Questions
What is a feature of some species of mammals related to testicular migration into the scrotal sac?
It is androgen-dependent
What is the consequence of failure to descend in the testicles?
Cryptorchidism
Which type of spermatocyte has entered meiosis II?
Secondary spermatocyte
What is the primary sex hormone secreted by the testes in males?
Testosterone
Which hormone exhibits negative feedback control of LH/FSH and GnRH in males?
Testosterone
What does the selected follicle release more of in the adult human female?
Estrogen
What is the fate of the first two pairs of kidneys during fetal development?
They degenerate
Which duct is retained in females during sex determination?
Paramesonephric duct
What does the inner cell mass differentiate into in a mammalian embryo?
Embryo proper
Which hormone plays a key role in the initiation of rhythmic uterine contractions during parturition?
Oxytocin
What is the main factor that controls the process of parturition?
'Ripening' of hormones
What is the first differentiated cell type in a mammalian embryo?
Trophectoderm
Which gonadal steroid does not typically mediate negative feedback at the hypothalamus and anterior pituitary?
Estradiol
What is the main hormone product of the testes?
Testosterone
Which hormone product of the ovaries is responsible for triggering a 'surge' release of LH/FSH?
Estradiol
What type of hormone is progesterone?
Progestin
Which hormone is not a product of the ovaries?
FSH
What triggers the luteal regression that marks the beginning of the follicular phase?
The absence of pregnancy
Which hormone surge causes the selected follicle to grow and secrete estrogen during the follicular phase?
FSH surge
What causes the massive release of gonadotropins during the follicular phase?
The high levels of estrogen
What happens to the somatic cells of the ovulatory follicle after the LH surge?
They transform into luteal cells
What causes the endometrial lining to be shed during the follicular phase?
The low levels of progesterone
What does the uterus prepare for under the influence of progesterone and estrogen during the luteal phase?
Pregnancy
This quiz covers topics related to reproduction principles in human physiology, including the hypothalamic-pituitary-gonadal axis, feedback regulation by gonadal steroids, and the main hormone produced by the testes, testosterone.
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