Question 1

The specialized organ that provides nourishment and filters away waste products from the developing baby is called the _________.

Accepted Answer

The placenta is a specialized organ that connects the developing fetus to the uterus and provides nourishment to the developing baby. It also filters away waste products from the baby's blood. The uterus is the muscular organ that holds the developing baby, but it does not provide nourishment or filter waste products. The umbilical cord connects the developing baby to the placenta and transfers nutrients and oxygen, but it is not the specialized organ that filters waste products. The embryo is the early stage of development before the fetus forms and it does not have a specialized organ for nourishment and waste filtration.

Question 2

Greta's child has facial deformities,a smaller than normal head,heart defects,mental retardation,learning difficulties,and delayed growth.If these defects can be traced to a teratogen used by Greta when she was pregnant,which was she most likely abusing?

Accepted Answer

Alcohol is known to be a teratogen and can cause a range of birth defects such as facial abnormalities, smaller head size, heart defects, mental retardation, learning difficulties, and delayed growth. Nicotine, cocaine, and marijuana can also have negative effects on fetal development, but they are not typically associated with as many or as severe birth defects as alcohol.

Question 3

Brittany and Abby Hensel are ___________.

Accepted Answer

Brittany and Abby Hensel are conjoined twins, meaning they are physically attached to each other.

Question 4

What are some of the common consequences to a child whose mother smoked while pregnant?

Accepted Answer

Smoking during pregnancy can lead to lower birth weight and shorter stature in the child, as well as increased risk of premature birth, respiratory problems, and developmental delays. Options A, C, and D are not common consequences of maternal smoking during pregnancy.

Question 5

Which of the following describes the way in which monozygotic twins occur?

Accepted Answer

Monozygotic (identical) twins occur when a single fertilized egg splits completely into two separate zygotes. The resulting embryos will have the exact same genes and be the same sex.

Question 6

Emily and her husband are thrilled as they peer into Emily's uterus by means of an ultrasound.The physician reports that the pregnancy appears normal,and that their baby's fingers,toes,heart,and circulatory system are developing as expected.The couple learns that the baby is one inch long.Given this information,the current stage of prenatal development is the_________.

Accepted Answer

The answer of Emily and her husband are thrilled as...

Question 7

The prenatal period during which tremendous growth occurs and the organs continue to develop and become functional is called the _______________ period.

Accepted Answer

The fetal period occurs during weeks 9-38 of gestation and is characterized by tremendous growth and development of organs becoming functional. The germinal period occurs during the first two weeks after conception, and the embryonic period occurs from weeks 3-8 of gestation. While "gestational" is a term that generally refers to the entire period of pregnancy, it does not specifically refer to the period of rapid growth and organ development during the fetal period.

Question 8

Abby and Brittany Hensel ________.

Accepted Answer

The answer of Abby and Brittany Hensel ________.
...

Question 9

Tameeka is at a point in her pregnancy during which the major organs and structures of her baby are first developing.Which period of prenatal development is Tameeka currently experiencing?

Accepted Answer

During the embryonic period, which occurs from weeks 3-8 of pregnancy, the major organs and structures of the baby are formed. This is a critical period of development, as any disruptions or damage during this time can have significant effects on the baby's health and development.

Question 10

_______________develop when two eggs each get fertilized by two different sperm,resulting in two zygotes in the uterus at the same time.

Accepted Answer

Dizygotic twins, also known as fraternal twins, develop when two different eggs are each fertilized by two different sperm, resulting in two zygotes. This is different from monozygotic twins, which develop from a single fertilized egg that splits in two, resulting in two genetically identical individuals.

Question 11

Mary and Juan are twins who developed from two separate fertilized ova that were fertilized by two different sperm.What type of twins are they?

Accepted Answer

Mary and Juan are dizygotic twins or fraternal twins because they developed from two separate fertilized ova that were fertilized by two different sperm. Monozygotic twins, also known as identical twins, develop from one fertilized egg that splits into two embryos. Maternal twins and wombmates are not recognized scientific terms for describing twins.

Question 12

Isabelle's baby was born blind,deaf,and with heart defects.Most likely Isabelle was exposed to _________ during her pregnancy.

Accepted Answer

Rubella infection during pregnancy can cause a congenital rubella syndrome which can result in various birth defects including blindness, deafness, and heart defects in the baby. Mercury exposure can cause developmental delays and neurological problems, syphilis can cause a range of problems including deafness, but it is not typically associated with blindness and heart defects. Radiation exposure during pregnancy can also increase the risk of birth defects, but it is not a common cause.

Question 13

Conjoined twins are _________.

Accepted Answer

Conjoined twins are monozygotic twins that occur when a single fertilized egg develops into two embryos but does not fully separate, resulting in two individuals joined together.

Question 14

The germinal period ________.

Accepted Answer

The germinal period refers to the first two weeks after fertilization, during which the zygote undergoes rapid cell division and eventually forms a blastocyst that implants in the uterine lining.

Question 15

Which of the following describes the embryonic period?

Accepted Answer

The embryonic period is the period during which the major organs and structures of the organism first develop. This stage generally lasts from the third week to the eighth week after fertilization.

Question 16

Monozygotic twins ______________.

Accepted Answer

Monozygotic (identical) twins come from the same fertilized egg, so they have identical genetic material.

Question 17

Ashley and Mary-Kate are twins who are genetically identical.What type of twins are they?

Accepted Answer

Ashley and Mary-Kate are genetically identical, which means they developed from a single fertilized egg that split into two embryos. This makes them monozygotic twins.

Question 18

Which of the following terms is used to describe any substance,such as a drug,chemical,or virus that can bring about a birth defect?

Accepted Answer

A teratogen is a substance that can cause birth defects. Critical period refers to a specific time during development when certain factors have a major impact on development. Carcinogen refers to a substance that can cause cancer. Biohazard refers to any substance that poses a threat to human health, such as infectious agents or toxic chemicals.

Question 19

Marisa is at a point in her pregnancy when the zygote is moving down her uterus,and the placenta and umbilical cord are beginning to form.Which period of prenatal development is Marisa currently experiencing?

Accepted Answer

The answer of Marisa is at a point in her...

Question 20

Times when certain internal and external influences have a major impact on development are called ______.

Accepted Answer

Critical periods refer to specific times in development when certain external or internal influences have a major impact on the developing individual. These periods are also characterized by a heightened sensitivity to certain stimuli, and if these stimuli are missing or inadequate, it can have lasting effects on development. Examples of critical periods include the development of language in early childhood and the formation of attachments in infancy.

Quiz 7: A: Development Across the Lifespan