The ratio of intracellular to extracellular fluids in the body of an average male is:
Which of the following body compartments is correctly matched with its location in the body?
xtracellular-fluid in tissue spaces, blood vessels, and lymphatic vessels
When sodium ions are reabsorbed in response to the action of aldosterone, potassium ions are:
Alkalosis is a pH of arterial blood
Meiosis is necessary because
otherwise the fertilized ovum will have too much genetic material.
The epithelium of the seminiferous tubules consists of
spermatogenic cells and sustentacular cells.
The hormone responsible for the development and maintenance of male secondary sex characteristics is
The level of testosterone in the blood is increased by
LH causing the interstitial cells to release testosterone
A Pap smear is used to detect abnormal cells in the
Fertilization normally occurs in the
Which of the following terms is/are correctly defined?
Ovulation-rupture of an ovarian follicle and release of a secondary oocyte and first polar body Vestibule-space enclosed by the labia minora Orgasm-pleasurable sense of physiological and psychological release All of the above
A mammary gland contains ____ lobes.
fifteen to twenty
Factors that may suggest prostate cancer include
cellular changes observed in a biopsy sample. elevated PSA level in the blood. enlargement of the prostate gland. all of the above.
The cells that result from meiosis are diploid
Each epididymis emerges from the bottom of a testis
An increase in the level of FSH at approximately day 14 causes ovulation.
The development, maintenance, and regulation of the male and female reproductive systems are the functions of:
During the female reproductive cycle, menstruation is triggered when:
blood levels of estrogens and progesterone drop.
Within the mammary glands, milk is produced by _____ glands.
Embryonic stem cells are derived from the
inner cell mass of the blastocyst.
The fetus is protected from certain infections, to which the mother is immune, by
antibodies from the mother's immune system.
The hormone measured in a pregnancy test is
A blastomere is a _____ and a blastocyst is _____.
cell produced by cleavage; a hollow ball of cells
The major body part(s) derived from ectoderm is/are
nervous system and skin.
The major body parts derived from endoderm are the epithelial lining of the
digestive tract. respiratory tract. urinary bladder. all of the above.
The major body parts derived from mesoderm are the
muscle tissue, bone tissue, and bone marrow.
Preimplantation genetic diagnosis works because
a cell can be removed from an 8-celled human embryo and the remaining 7 cells can continue developing.
Progesterone in semen stimulates the movement of sperm cells.
Factors that can cause congenital malformations by affecting an embryo during its periods of rapid growth and development are called teratogens.
The ductus arteriosus allows fetal blood to bypass the lungs.
Some factors that help to stimulate the newborn's first breath are increasing CO2, decreasing pH, decreasing O2, decreasing body temperature, and mechanical stimulation.
In an adult, a solid, cordlike structure called the ______ ______ represents the former umbilical vein.
The process of growing old is called _____.
What term refers to the continuous process by which an individual changes during life?
What chemical stimulates the sperm's tail movement for propulsion through the uterus and uterine tube?
he time from fertilization to birth is called the
and the time after birth is called the
What is the number one leading cause of death in the United States in 2007?
aging is the breakdown of structures and slowing of functions.
aging is the appearance of new substances or new activities
Correct Sequence of Embryonic Stages
zygote, morula, blastocyst,embryoblast.
The production of immature oocytes in the ovary.
Which two hormones influence the endometreum to thicken?
Progesterone and estrogen
What stimulates the secondary oocyte to complete meiosis?
When a sperm cell penetrates the oocyte membrane
The secondary oocyte is a haploid?
If fertilization does not occur the corpus luteum becomes a
Which hormone prevents degeneration of the corpus luteum
Human Chorionic gonadotropin
Gonadotropic releasing hormones is released by the
When does a mature oocyte complete meiosis 1?
Just prior to ovulation
Decreasing levels of _______ lead to sloughing or shedding f the endometrial lining.
Meiosis 2 is identical to mitosis.
The exchange of DNA between adjacent homologous chromatids is known as what?
How many cekks are formed in meiosis?
During Meiosis, DNA must replicate twice.
differing orientations of chromosomes along the cell equator during meta phase 1, resulting in gametes with different combinations, or parental chromosomes is known as?
How many chromosomes do daughter cells contain at the end of meiosis?
What is exchanged during crossing over?
which of the following is not a unique characteristic of meiosis when compared with mitosis?
How many nuclear divisions occur in Meiosis?
The process of homologous pairing along the length of chromosomes during meiosis is known as what>
During Meiosis, homologous pairs of chromosomes can exchange pieces of DNA after the synapse
a single cell division that results in 2 diploid cells
completion of meiosis produces
4 haploid daughter cells
Dna replication occurs prior to both meiosis and mitosis?