A&P Chapter 16
Parturition occurs approximately how many days after a woman's last menstrual cycle
280 days
For a sperm cell to fertilize an ovum, sexual intercourse must occur no more than __ hours before ovulation
48
The entire process of spermatogenesis takes approximately
64-72 days
Normal healthy semen has an approximate pH level of
7.2-7.6
The portion of the male urethra that is surrounded by the prostate is called the membranous urethra
False
The two functional areas of the blastocyst are the morula and the trophoblast
False
Urine and sperm are able to pass through the urethra at the same time
False
Viable sperm cannot be produced at temperatures below body temperatures
False
When a year has passed without menstruation, a woman has reacher menarche
False
Male sex chromosomes are represented by
XY
During oogenesis, an oogonium directly gives rise to
a primary oocyte
Milky-colored fluid secreted from the prostate
activate sperm
Androgens such as testosterone are produced by the
interstitial cells
Which one of the following is NOT a component of semen
epididymal fluid
Maturing sperm gain their ability to swim while in the
epididymis
The stage of labor that involves the delivery of the infant is the
expulsion stage
Spermatogenesis produces
four sperm
The superior rounded region of the uterus above the entrance of the uterine tubes is called the
fundus
The enlarged tip of the penis is referred to as the
glans penis
Menopause, which ends childbirth ability, is considered to have occurred when a woman
has gone a year without menstruation
Which one of the following is NOT one of the secondary sex characteristics typical of males
increased sex drive
Fertilization usually occurs in the
uterine (fallopian) tubes
A fertilized egg is known as a
zygote
In a female, the labia minor are two outer, hair-covered folds of skin that enclose the delicate, hair-free folds called the labia majora
False
Oocytes are viable for 48-72 hours once ovulated from the ovary
False
Ovulation occurs during the secretory phase of the uterine (menstrual) cycle
False
Sperm are matures and ejaculated from the epididymis and ductus vas deferent during ejaculation
False
Spermatids are functional sperm
False
The endoderm gives rise to the nervous system and the epidermis of the skin
False
The hormone that causes secondary sex characteristics in males is progesterone
False
The innermost layer of the uterus is called the myometrium
False
Each spermatid and ovum have
23 chromosomes
The process of ovulation occurs in females approximately every
28 days
The uterine (menstrual) cycle us
28 days long
The presence of more oxytocin receptors in the uterus lead to weak, irregular contractions known as
Braxton Hicks
A primary oocyte undergoes meiosis and produces a secondary oocyte and a polar body
True
An erection results from blood filling the spongy erectile tissues of the penis
True
Beginning at the ninth week of development, the embryo is referred to as a fetus.
True
Estrogens cause the appearance of the secondary sex characteristics in females
True
Hypertrophy of the prostate gland makes urination quite difficult for males
True
One primary spermatocyte will undergo meiosis to ultimately form four sperm
True
Oocytes are carried toward the uterus by both cilia and peristalsis
True
Ovaries contain many tine saclike structures called ovarian follicles, each of which consist of an immature egg surrounded by one or more layers of follicle cells
True
Ovulation occurs when a vesicular (Graafian) follicles release an egg
True
Ovulation usually occurs on or about day 14 of the menstrual cycle
True
Progesterone is produced by the corpus luteum and is needed for maintenance if a female becomes pregnant
True
Sperm swim are sluggish in an acidic environment below a pH of 6
True
The acrosome helps a sperm penetrate the follicle cells that surround the egg
True
The bulbourethral glands are located inferior to the prostate gland and produce a clear mucous secretion that aids lubrication during sexual intercourse
True
The cervix typically dilates to about 10 cm during the dilation stage of labor
True
The cyclic changes that occur monthly in the ovary constitute the ovarian cycle
True
The diamond-shaped region of a female's external genitalia found between the anterior end of the labial folds, the anus posteriorly, and the ischial tuberosities is called the perineum
True
The ejaculatory duct passes through the prostate gland
True
The external genitalia of a female is also called the vulva
True
The males testes have both an endocrine and an exocrine function
True
The placenta and its attached fetal membranes, delivered during the placental stage of labor, are called the afterbirth
True
The process of childbirth is known as parturition
True
The rapid mitotic cell division that occurs after the fertilization of an egg is known as cleavage
True
When a woman is not pregnant, the endometrial lining of the uterus is sloughed off about every 28 days
True
The clusters of specific glands that produce milk when a woman is lactating are called
alveolar glands
The fluid-filled sac surrounding the fetus is the
amnion
From fertilization to week 8 of pregnancy, the conceptus is called
an embryo
Thick, clear mucus that cleanses the urethra of acidic urine is produced by the
bulbourethral glands
Parturition is another term for
childbirth
The external female structure that corresponds to the male penis the
clitoris
Which one of the following is NOT one of the secondary sex characteristics in young women
decreased fat deposits beneath the skin
During a vasectomy operation, what portion of the male reproductive duct system is cut to prevent the passage of sperm to the outside of the body
ductus (vas) deferens
Sperm that are ejaculated travel from the epididymis into the
ductus (vas) deferens
Spermatogenesis begins
during puberty
The placenta is usually functioning to deliver nutrients and oxygen to, and remove waste from, the embryonic blood by the __ of embryonic development
eighth week
Peristaltic waves squeeze sperm from the epididymis along to the outside of the male's body during
ejaculation
Which of the following is NOT a part of a male's testis
ejaculatory duct
The primary germ layer that gives rise to the mucosa and associated glands is the
endoderm
The inner mucosal layer of the uterus that is sloughed off approximately every 28 days is called the
endometrium
Which layer of the uterus serves as the site of implantation
endometrium
The hormone responsible for ovulation is
luteinizing hormone
The middle part of the male urethra that extends from the prostate to the penis is called the
membranous urethra
The first menstrual period, which usually occurs at approximately age 13, is called
menarche
The mammary glands are
modified sweat glands in both males and females
The tiny ball of 16 cells found freely floating in the uterine cavity is called a
morula
The process by which a mature egg is ejected from the ovary is called
ovulation
Labor is initiated by prostaglandins and
oxytocin
Circumcision for males removes
prepuce
Females are born with a supply of approximately 2 million
primary oocytes
The corpus lute is a special glandular structure of the ovaries that primarily produces
progesterone
The hormone produced by the placenta that causes the pelvic ligaments and pubic symphysis to relax, widen, and become more flexible to ease birth passage is called
relaxin
Which of the following cells could be fertilized
secondary oocyte
The exocrine function of the testes is
sperm production
The primitive stem cell of spermatogenesis, which is found on the periphery of each seminiferous tubule, is called
spermatogonia
The process in which perm are streamlined into a head, mid piece, and tail is called
spermiogenesis
Which one of the following is NOT true of the proliferative state of the menstrual cycle
the endometrium becomes thin and shiny in appearance
Days 15-28 of the uterine (menstrual) cycle are known as
the secretory phase