Exam 20: The Reproductive System

Parasympathetic stimulation of the uterine muscle is involved in the process of parturition.

Indicate which item in the following answer code best matches the description in each question by writing the appropriate letter in the blank. -Secretes estrogen but not progesterone

The normal sequence of developmental stages is

The fimbriae and their cilia usually guide the secondary oocyte into the oviduct following ovulation.

Which of the following is a female accessory sex organ?

The embryonic ____________________ gives rise to the glans penis in males and the clitoris in females.

Match the three levels of sexual distinction between males and females by writing the appropriate letters in the blanks. a.Apparent anatomic sex of the individual b.Combination of sex chromosomes at the time of conception c.Development of testes or ovaries -Gonadal sex

Spermatogenesis is directly controlled by

Fetal testes secrete testosterone, and fetal ovaries secrete estrogen.

In a sexually mature individual, pulses of GnRH are secreted once a day.

Indicate which item in the following answer code best matches the description in each question by writing the appropriate letter in the blank. -Site of final maturation of sperm for motility and fertility in the male

Use this figure to answer the corresponding questions.Names and numbers can be used more than once. -The ____________________ (labeled # ____) contains a plug of mucus that helps prevent bacteria from entering the body cavity.

Erection is a vascular phenomenon that involves decreased sympathetic and increased parasympathetic activity to the penile arterioles, resulting in arteriolar vasodilation and filling of the erectile tissue with blood.

Testosterone is directly responsible for differentiating the external genitalia into the penis and scrotum.

The ____________________ sex characteristics refer to the many external characteristics not directly involved in reproduction that distinguish males and females.

A high local concentration of testosterone within the seminiferous tubules is essential for sustaining sperm production.

The Sertoli cells provide nourishment for the developing sperm cells.

A reduction in the secretion of ____ may serve as the trigger for the onset of puberty.

Indicate which description matches the item by writing the appropriate letter in the blank. a.Special milk produced during the first five days postpartum b.Evacuated from the uterus as "afterbirth" c.Super-rich endometrial tissue at the implantation site d.The two-cell layered trophoblastic tissue that forms the fetal portion of the placenta e.The intervening membrane between the developing oocyte and surrounding granulosa cells -Decidua

RU 486 is a progesterone antagonist.