Chapter 27/28
Which of the following is considered a primary sex organ in females?
Sperm is produced in the _____ of the testes.
seminiferous tubules
Sperm is stored in the ______.
Which of the following does not add substances to seminal fluid?
The number of chromosomes in a human gamete is ____; this is referred to as the _______ chromosome number.
23; haploid
The dartos and cremaster muscles are important to the integrity of the male reproductive system. Which of the following is true about the role they play?
They regulate the temperature of the testes.
Which of the following glands are responsible for 60% of the synthesis of semen?
seminal vesicles
The cells that produce testosterone in the testis are called ________.
interstitial cells
Surgical cutting of the ductus deferens as a form of birth control is called a(n) ________.
It is necessary for the testes to be kept below body temperature.
A 38-year-old male is upset about his low sperm count and visits a "practitioner" who commonly advertises his miracle cures of sterility. The practitioner is a quack who treats conditions of low sperm count with megadoses of testosterone. The patient experiences a huge surge in libido. Would this treatment result in a higher or lower sperm count, and why?
Lower sperm count. High levels of testosterone inhibit the release of GnRH, inhibiting FSH release, resulting in inhibition of spermatogenesis.
The release of _____ encourages interstitial cells to release _____.
luteinizing hormone; testosterone
Which of the following female sex hormones is most responsible for estrogenic effects?
The _____ connects the uterus to the vagina.
Human egg and sperm are similar in that ________.
Same number of chromosomes
The constancy of the chromosome number from one cell generation to the next is maintained through ________.
Select the correct statement about male sexual response
Erection is the result of vascular spaces in the erectile tissues filling with blood.
The secretions of the bulbourethral glands neutralize traces of acidic urine in the urethra and serve as a lubricant during sexual intercourse
Which of the following is false regarding the vagina of an adult female?
The pH of the adult vagina is alkaline
During the secretory phase of the uterine cycle:
the endometrium prepares for implantation
The primary function of the uterus is to ________.
receive, retain, and nourish a fertilized ovum
Fertilization generally occurs in the ________.
fallopian tubes
The Pap smear is a test to detect cancerous changes in cells of the cervix.
The soft mucosal lining of the uterus is the endometrium
Which of the following can be cured?
What is the role of the corpus luteum?
to produce hormones that maintain the uterine lining during the first months of pregnancy
In humans, separation of the cells at the two-cell state following fertilization may lead to the production of twins, which in this case would be ________.
Effects of estrogen include ________.
growth of the breasts at puberty
Normally menstruation occurs when ________.
blood levels of estrogen and progesterone decrease
Which hormone is absolutely necessary for ovulation to occur?
Which of the following statements about the female reproductive process is not true?
Rebuilding the endometrium is under the control of prolactin.
Men have only one ___ but have two of all the rest of these.
Prostate gland
The small paired structures at the base of the penis that produce a lubricating secretion are the
bulbourethral glands.
Polyspermy in humans results in
a nonfunctional zygote.
The reproductive system
nourishes gametes
stores and transports gametes
produces gametes
The following is a list of structures in the male reproductive system:

1. ductus deferens

2. urethra

3. ejaculatory duct

4, 1, 3, 2
The genetic sex of a child is determined by
the sperm.
Which male hormone inhibits the secretion of FSH?
The fertilized egg is known as the ____________.
Sperm freshly deposited in the female vagina are incapable of fertilizing an egg. What must happen first?
The result of polyspermy in humans is ________.
a nonfunctional zygote
The correct sequence of preembryonic structures is ________.
zygote, morula, blastocyst
The period from fertilization through week eight is called the embryonic period.
Which of the following is the primary germ layer that forms the basis for the digestive, respiratory, and urogenital systems, and associated glands?
Which hormone maintains the viability of the corpus luteum?
human chorionic gonadotropin
Which of the following is true in reference to what may pass through the placental barriers?
nutrients, respiratory gases, wastes, and alcohol
A blastocyst is a hollow ball of cells, while the morula is a solid ball of cells.
The foramen ovale and the ductus arteriosus are both examples of:
pulmonary bypass shunts, which serve to bypass the lungs.
Which of the following is the longest stage of labor, lasting 6-12 hours or more?
Dilation stage
Which of the following structures is derived from the ectoderm?
brain and spinal cord
The umbilical arteries carry ________.
waste products to the placenta
At what period of fetal development are all body systems present in at least rudimentary form?
8 weeks post fertilization
In which stage of labor does crowning occur?
An episiotomy is an incision made to widen the vaginal orifice, aiding fetal expulsion.
What does the foramen ovale become at birth?
Fossa ovalis
Which of the following is not a correct matching of a fetal structure with what it becomes at birth?
ductus arteriosus-ligamentum teres
The birth control pill is the most common and most effective birth control method.