Question 1

Which of the following statements about the placenta is correct?

Accepted Answer

A)  Oxygenated blood flows from the placenta to the fetus through the umbilical arteries. 
B)  Maternal and fetal blood mix in the placenta. 
C)  The placenta secretes hormones necessary for the continuation of pregnancy. 
D)  The placenta effectively screens nicotine,alcohol and most drugs,thus protecting the fetus. 
A)  Oxygenated blood flows from the placenta to the fetus through the umbilical arteries. 
B)  Maternal and fetal blood mix in the placenta. 
C)  The placenta secretes hormones necessary for the continuation of pregnancy. 
D)  The placenta effectively screens nicotine,alcohol and most drugs,thus protecting the fetus. C

Question 2

What key developmental task initiates the beginning of the embryonic stage?

Accepted Answer

A)  The placenta becomes functional 
B)  The beginning of the fetal heartbeat 
C)  The formation of the germ layers 
D)  The development of a yolk sac 
A)  The placenta becomes functional 
B)  The beginning of the fetal heartbeat 
C)  The formation of the germ layers 
D)  The development of a yolk sac C

Question 3

Which statement about the amnion is accurate?

Accepted Answer

A)  The amnion is filled with fluid that supplies the embryo with nutrition. 
B)  The amnion begins to develop at the time of conception. 
C)  The fetus "breathes" and swallows the fluid in the amniotic sac. 
D)  The fluid volume in the amnion remains stable because it is fed by the maternal blood supply. 
A)  The amnion is filled with fluid that supplies the embryo with nutrition. 
B)  The amnion begins to develop at the time of conception. 
C)  The fetus "breathes" and swallows the fluid in the amniotic sac. 
D)  The fluid volume in the amnion remains stable because it is fed by the maternal blood supply. C

Question 4

Which extraembryonic membrane eventually forms the fetal side of the placenta?

Accepted Answer

A)  Amnion 
B)  Chorion 
C)  Allantois 
D)  Yolk sac 
A)  Amnion 
B)  Chorion 
C)  Allantois 
D)  Yolk sac

Question 5

The progressive thinning of the cervical walls is called cervical ____________________.

Accepted Answer

The answer of The progressive thinning of the cervical walls...

Question 6

What are the germ layers,and from what do they arise?

Accepted Answer

A)  The germ layers are an inner cell mass that flattens to form the embryonic disc. 
B)  The germ layers are an inner cell mass that separates from the trophoblast to create the amniotic cavity. 
C)  The germ layers are shoots sent out by the trophoblast to gain nourishment from the endometrium. 
D)  The germ layers are three layers that arise from the embryonic disc and produce all the organs and tissues of the body. 
A)  The germ layers are an inner cell mass that flattens to form the embryonic disc. 
B)  The germ layers are an inner cell mass that separates from the trophoblast to create the amniotic cavity. 
C)  The germ layers are shoots sent out by the trophoblast to gain nourishment from the endometrium. 
D)  The germ layers are three layers that arise from the embryonic disc and produce all the organs and tissues of the body.

Question 7

Which of the following is one of the factors thought to contribute to the onset of labor?

Accepted Answer

A)  An increase in progesterone 
B)  A decline in estrogen 
C)  The release of oxytocin 
D)  Fetal movement 
A)  An increase in progesterone 
B)  A decline in estrogen 
C)  The release of oxytocin 
D)  Fetal movement

Question 8

What role is served by the ductus venosus?

Accepted Answer

A)  It shunts blood from the right into the left atrium. 
B)  It shunts blood around the liver. 
C)  It shunts blood from the right ventricle to the pulmonary artery. 
D)  It shunts blood around the kidneys. 
A)  It shunts blood from the right into the left atrium. 
B)  It shunts blood around the liver. 
C)  It shunts blood from the right ventricle to the pulmonary artery. 
D)  It shunts blood around the kidneys.

Question 9

A woman giving birth for the first time is called a ____________________.

Accepted Answer

The answer of A woman giving birth for the first...

Question 10

The stage of development that begins at fertilization and lasts for 16 days is called the

Accepted Answer

A)  fetal stage. 
B)  zygotic stage. 
C)  embryonic stage. 
D)  pre-embryonic stage. 
A)  fetal stage. 
B)  zygotic stage. 
C)  embryonic stage. 
D)  pre-embryonic stage.

Question 11

The fine hair covering the fetus's body is called ____________________.

Accepted Answer

The answer of The fine hair covering the fetus's body...

Question 12

What is the name of the blackberry-like cluster of cells that enter the uterine cavity 3 to 4 days after ovulation?

Accepted Answer

A)  Blastomere 
B)  Morula 
C)  Blastocyst 
D)  Zygote 
A)  Blastomere 
B)  Morula 
C)  Blastocyst 
D)  Zygote

Question 13

Blood returns to the fetus from the placenta via the

Accepted Answer

A)  umbilical arteries. 
B)  umbilical vein. 
C)  lacunae. 
D)  chorionic villi. 
A)  umbilical arteries. 
B)  umbilical vein. 
C)  lacunae. 
D)  chorionic villi.

Question 14

During lactation,the release of which hormone forces milk into the ducts?

Accepted Answer

A)  Prolactin 
B)  Oxytocin 
C)  Estrogen 
D)  Progesterone 
A)  Prolactin 
B)  Oxytocin 
C)  Estrogen 
D)  Progesterone

Question 15

If the ductus arteriosus fails to close at birth,what symptoms would you expect to see and why?

Accepted Answer

A)  Respiratory difficulty,because blood is bypassing the lungs 
B)  Increased levels of toxins in the blood,because blood is bypassing the liver 
C)  Decreased urine output,because blood is bypassing the kidneys 
D)  Decreased nutrition,because blood is bypassing the stomach 
A)  Respiratory difficulty,because blood is bypassing the lungs 
B)  Increased levels of toxins in the blood,because blood is bypassing the liver 
C)  Decreased urine output,because blood is bypassing the kidneys 
D)  Decreased nutrition,because blood is bypassing the stomach

Question 16

Most of the organs are developed during which stage of pregnancy?

Accepted Answer

A)  First trimester 
B)  Second trimester 
C)  The last week of the first trimester 
D)  Third trimester 
A)  First trimester 
B)  Second trimester 
C)  The last week of the first trimester 
D)  Third trimester

Question 17

The umbilical cord contains

Accepted Answer

A)  two umbilical arteries and one umbilical vein. 
B)  two umbilical arteries and two umbilical veins. 
C)  one umbilical artery and one umbilical vein. 
D)  one umbilical artery and two umbilical veins. 
A)  two umbilical arteries and one umbilical vein. 
B)  two umbilical arteries and two umbilical veins. 
C)  one umbilical artery and one umbilical vein. 
D)  one umbilical artery and two umbilical veins.

Question 18

Which of the following statements about the first stage of labor is correct?

Accepted Answer

A)  It is the shortest stage of labor. 
B)  It begins after the rupture of fetal membranes. 
C)  It is the stage in which the top of the baby's head first appears. 
D)  It ends when the cervix is fully dilated. 
A)  It is the shortest stage of labor. 
B)  It begins after the rupture of fetal membranes. 
C)  It is the stage in which the top of the baby's head first appears. 
D)  It ends when the cervix is fully dilated.

Question 19

The mesoderm gives rise to

Accepted Answer

A)  cardiac muscle. 
B)  the epidermis. 
C)  the nervous system. 
D)  the thyroid gland. 
A)  cardiac muscle. 
B)  the epidermis. 
C)  the nervous system. 
D)  the thyroid gland.

Question 20

A fertilized egg is called a ____________________.

Accepted Answer

The answer of A fertilized egg is called a ____________________....

Exam 24: Pregnancy Human Development

Which of the following statements about the placenta is correct?

What key developmental task initiates the beginning of the embryonic stage?

Which statement about the amnion is accurate?

Which extraembryonic membrane eventually forms the fetal side of the placenta?

The progressive thinning of the cervical walls is called cervical ____________________.

What are the germ layers,and from what do they arise?

Which of the following is one of the factors thought to contribute to the onset of labor?

What role is served by the ductus venosus?

A woman giving birth for the first time is called a ____________________.

The stage of development that begins at fertilization and lasts for 16 days is called the

The fine hair covering the fetus's body is called ____________________.

What is the name of the blackberry-like cluster of cells that enter the uterine cavity 3 to 4 days after ovulation?

Blood returns to the fetus from the placenta via the

During lactation,the release of which hormone forces milk into the ducts?

If the ductus arteriosus fails to close at birth,what symptoms would you expect to see and why?

Most of the organs are developed during which stage of pregnancy?

The umbilical cord contains

Which of the following statements about the first stage of labor is correct?

The mesoderm gives rise to

A fertilized egg is called a ____________________.

Orientation to the Human Body

Chemistry of Life

Cells

Tissues

Integumentary System

Bones Bone Tissue

Skeletal System

Joints

Muscular System

Nervous System

Sense Organs

Endocrine System

Blood

Heart

Vascular System

Lymphatic Immune Systems

Respiratory System

Urinary System

Fluid,electrolyte Acid-Base Balance

Digestive System

Nutrition Metabolism

Human Microbiome

Reproductive Systems

Heredity

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