Chapter 27 Exam #4
Ovulation usually occurs on or about day _____ of a 28-day ovarian cycle
14
Which of the following agents can cause an infection that can ultimately develop into pelvic inflammatory disease in women?
Chlamydia trachomatis
A decrease in ________ is followed by the gradual degradation of the corpus luteum.
LH
Which pituitary secretion stimulates the testes to secrete androgens?
LH
Where does fertilization of an egg cell occur?
Luteinizing hormone (LH)
Which of the following statements regarding spermatogenesis and oogenesis is true?
Meiosis in oogenesis produces one mature egg from one primary oocyte.
Which of the following statements regarding sexual reproduction is true?
Sexual reproduction generates greater genetic variation than asexual reproduction.
Which of the following statements about the reproductive system of human females is true?
The corpus luteum secretes progesterone, which helps maintain the uterine lining during pregnancy
Reproductive systems with external fertilization are most common in
aqautic animals
The function of a sperm cell's acrosome is to
carry enzymes that help the sperm penetrate the egg.
Menstruation
coincides with the beginning of the pre-ovulatory phase of the ovarian cycle.
The embryo implants in the ________ of the uterus.
endometrium
After being produced in the testes, sperm mature further in a structure called the
epididymis
Sperm become capable of movement while in the _____
epididymis
If there is no fertilization, degeneration of the corpus luteum results in a drop in _____, which results in the sloughing off of the uterus's endometrium.
estrogen and progesterone
After ovulation, high levels of _____ inhibit _____ secretion.
estrogen and progesterone ... FSH and LH
Developing ovarian follicles primarily secrete _____.
estrogens
Which of the following STDs is caused by a virus that can also cause cancer?
genital warts
What is shed from the body in menstruation?
he thickened endometrium when fertilization has not occurred
If there is fertilization, secretion of _____ by the early embryo maintains the corpus luteum.
human chorionic gonadotropin
Fission is an asexual process
in which a parent separates into two individuals of approximately equal size
A rapid increase in the _____ level stimulates ovulation
luteinizing hormone
The secretion of androgens is regulated by a _____ feedback mechanism involving the _____ and _____.
negative ... hypothalamus ... pituitary gland
Where does fertilization of an egg cell occur?
oviduct
hat is the usual site of the fertilization of an egg cell?
oviduct
Hermaphrodites are animals that
possess both male and female reproductive systems.
Men who take very long, hot baths are likely to
produce fewer sperm
Which of the following produces a thick fluid containing fructose, which is used for energy by sperm?
seminal vesicles
Sperm develop in the _____.
seminiferous tubules
Human testes are positioned in an external sac rather than in the abdominal cavity
so the testes can be kept cooler than the body's interior.
The human egg is swept through the oviduct toward the uterus by
the beating of cilia in the oviduct.
Which of the following serves as an impenetrable barrier that prevents more than one sperm from fertilizing an egg?
the vitelline layer
The ovaries release increasing levels of estrogen and progesterone immediately after ovulation. This results in _____.
thickening of the endometrium and reduced production of FSH and LH, which feeds back to prevent further ovulation
True or false. The corpus luteum develops from the ruptured follicle during the luteal phase after ovulation and produces hormones that can aid in pregnancy.
true
Fertilization in the female reproductive tract typically occurs in the
upper part of the oviduct
Sperm exit a male's body via the _____.
urethra
A fertilized egg usually implants itself and develops in the _____.
uterus
Which of the following hormones stimulates the growth of an ovarian follicle?
FSH
Which pituitary secretion stimulates sperm production?
FSH
The anterior pituitary gland, under the control of the hypothalamus, produces _____, which stimulate _____.
FSH and LH ... egg maturation and ovulation
What is the function of the thickened endometrium?
It nourishes the early embryo during the process of implantation.
Which of the following is not a potential advantage of asexual reproduction?
It produces genetically diverse populations.
How are the ovulation cycle and the menstruation cycle coordinated?
The processes regulate each other through a system that involves four major hormones
Which of the following generates the ATP that is required for movement of the sperm's tail?
a mitochondrion in the neck and middle piece
Which hormone(s) is(are) directly responsible for triggering the development of the secondary sex characteristics of males, such as beard growth?
androgens
