Anatomy Ch 25
By undergoing meiosis, each primary spermatocyte ultimately gives rise to how many sperm cells?
4
Sperm are moved from the testis into the epididymis by
testicular fluid moved by cilia and smooth muscle cells.
The usual site of embryo implantation is the
uterus
Fingerlike placental structures where oxygen and nutrients from the maternal blood supply diffuse into the embryonic blood.
chorionic villi
The placenta consists of which two structures?
chorionic villi and decidua basalis
Which of the following organs does not contribute secretion(s) during the male sexual response?
corpus cavernosum
Involuntary contraction of this smooth muscle layer wrinkles and thickens the walls of the scrotum to prevent heat loss.
dartos muscle
Tubular organ that is transected during a vasectomy.
ductus deferens
Of the following tubular structures, which is the only one that lies partly outside the testis?
efferent ductule
Which of the following statements about pelvic inflammatory disease is incorrect?
It inhibits ovulation.
Sperm become motile in the
epididymis.
Erection is caused by
erectile bodies filling with blood
The opening of the oviduct is surrounded by these structures.
fimbriae
The female uterine cycle begins
first day of menstruation
The ovarian cortex consists of
follicles and connective tissue.
The capillaries within a chorionic villus of the placenta contain blood
from the fetus.
The cells that secrete estrogens in females are
granulosa cells
Which of the following occurs when the testes do not descend into the scrotum before birth?
Viable sperm will not be produced.
The function of the pampiniform plexus of veins is to
help cool blood.
The acrosomal reaction occurs
just before fertilization.
The female homologue of the male scrotum is the
labia majora.
The prepuce of the clitoris is formed by the
labia minora
In breast cancer, the cancer cells usually originate from the
lactiferous ducts.
In an adult woman who has never been pregnant, the breasts have poorly developed or no
lobules of acini/alveoli.
Which of the following is not contained in the fluid secreted by the seminal glands?
macrophages
The vaginal fornix
surrounds the tip of the cervix.
A woman has developed a cancerous lump in each breast, and the skin of the breasts is dimpled. What structure(s) is/are causing the dimpling?
suspensory ligaments of the breast
This multinucleate embryonic structure invades the uterus, digesting cells and maternal blood vessels to make way for development of the placenta.
syncytiotrophoblast
All of the following are adaptations for keeping the testes cool except the
testicular artery.
Which of the following is the primary sex organ in the male?
testis
A difference between a primary follicle and a primordial follicle is that
the primordial follicle has only a single layer of flat follicular cells, whereas the primary follicle is comprised of cuboidal follicle cells which multiply.
At what point during fetal development are the decidua basalis and chorionic villi collectively referred to as the placenta?
the start of fourth month
The structural basis of the blood-testis barrier is
the tight junctions between sustentocytes.
In addition to the remaining granulosa cells, which of the following cell types make up the corpus luteum?
theca cells
The most common site of ectopic pregnancy is the
uterine tube
In females, the paramesonephric ducts give rise to the
uterine tubes and uterus.
The largest region of the uterus is its
body.
The typical (diploid) cells of the body have 46 chromosomes; how many chromosomes does each gamete have?
23
The seminal vesicles
are glands that secrete most of the volume of the semen.
Hypospadias
a condition in which the opening of the urethra is on the underside of the penis instead of at the tip.
The zona pellucida is
a protective shell around the oocyte that sperm must penetrate for fertilization to occur.
A varicocele
all of the above are correct
The function of the cremaster muscle is to
alter the position of the testes in the scrotal sac with increases in ambient temperature.
Inguinal hernias
always enter the inguinal canal
In which part of the uterine tube does fertilization usually occur?
ampulla
The ________ is the fluid-filled cavity in a mature ovarian follicle.
antrum
An episiotomy during childbirth is performed to
minimize tearing of the central tendon and muscles of the pelvic floor.
Most support of the uterus is provided by the
muscles of the pelvic floor.
Which testicular cells help deliver sperm to the epididymis by contracting rhythmically?
myoid
This layer of the uterus contracts during parturition to expel the baby.
myometrium
Tubules that connect testicular lobules with the efferent ductules of the epididymis.
rete testis
Which of the following anchors the uterus into its anteverted position in the pelvis?
round ligament
All of the following are functions of the sustentocytes in the seminiferous tubules except
secretion of testosterone.
The ________ phase of the uterine cycle occurs after ovulation.
secretory
The correct sequence of sperm-transporting tubules that transport spermatozoa to the epididymis is
seminiferous tubule to straight tubule to rete testis to efferent ductule.
The milk-producing cells in the breast are
simple cuboidal epithelial cells in alveoli.
One factor that propels an oocyte through the uterine tube is
smooth muscle contraction (peristalsis).
During the proliferative phase of the uterine cycle, these vessels grow and proliferate.
spiral arteries
The epithelium lining the vagina is
stratified squamous.