Question 1

The mesoderm will give rise to the:

Accepted Answer

The mesoderm is the middle layer of the three primary germ layers in the early embryo. It gives rise to the circulatory system, among other systems such as the skeletal and muscular systems.

Question 2

Muscles, the skeleton, arteries, veins and the urinary system all have in common:

Accepted Answer

The mesoderm is the middle layer of the three primary germ layers in the early embryo. It gives rise to muscles, the skeleton, the circulatory system (including arteries and veins), and the urinary system.

Question 3

The nervous system begins to appear in the __________ week.

Accepted Answer

The nervous system begins to appear in the third week of embryonic development.

Question 4

The __________ supplies the embryo with all its needs, carries off all its wastes and protects it from harm.

Accepted Answer

The placenta is responsible for supplying the embryo with all its needs, including nutrients and oxygen, as well as removing waste products. It also acts as a barrier, protecting the developing embryo from harmful substances such as bacteria and toxins. The uterus provides a home for the developing embryo, while the amniotic sac surrounds and cushions the embryo. The chorion is a part of the placenta, but does not supply the embryo with nutrients or protect it from harm on its own.

Question 5

The placenta is composed of tissue from:

Accepted Answer

The answer of The placenta is composed of tissue from:
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Question 6

Marnie is a nursing student currently studying pregnancy. Her husband hears her pacing in her study mumbling, "Ectoderm, mesoderm, endoderm, ectoderm, mesoderm, endoderm…" What is Marnie apparently studying?

Accepted Answer

Marnie is studying the three primary germ layers (ectoderm, mesoderm, endoderm) that form during embryonic development, which are crucial for cellular differentiation in human embryos.

Question 7

The neural tube is formed from the:

Accepted Answer

The neural tube is formed from the neural plate, which is a structure that arises from the ectoderm during early embryonic development.

Question 8

Basimah is in her fifth week of pregnancy. At what stage of development is the child growing within her?

Accepted Answer

At five weeks of pregnancy, the child is in the embryonic stage. The zygote stage lasts for the first two weeks after conception, while the embryonic stage lasts from three to eight weeks. The fetal stage then begins and lasts until birth. Therefore, the correct answer is the embryonic stage.

Question 9

The __________ is a fluid filled uterine bag that surrounds the embryo.

Accepted Answer

The amniotic sac is the fluid-filled sac that surrounds and protects the embryo in the uterus.

Question 10

Juno is curious about the development of her baby's fingernails. She might be happy to know these will develop from the:

Accepted Answer

The ectoderm is the outermost layer of cells in the developing embryo and gives rise to structures such as the skin, hair, nails, and nervous system.

Question 11

The neural plate forms from the ectoderm in a process called:

Accepted Answer

Neural induction is the process by which the ectoderm is instructed to form the neural plate, which is the precursor to the central nervous system.

Question 12

Cellular differentiation in the embryo occurs in the __________ period.

Accepted Answer

Cellular differentiation occurs during the embryonic period, which is the period of development from approximately the third week after fertilization until the end of the eighth week. The germinal period refers to the first two weeks after fertilization, during which the zygote undergoes rapid cell division and travels through the fallopian tube to the uterus. The blastocyst is the stage of development that occurs after the zygote has undergone several rounds of cell division and develops into a hollow ball of cells, which occurs during the germinal period. The fetal period refers to the period of development from the ninth week after fertilization until birth, during which the fetus grows and develops further.

Question 13

The brain is derived from the __________ layer of the embryo.

Accepted Answer

The brain is derived from the ectoderm layer of the embryo, which is the outermost layer that also forms the nervous system and skin.

Question 14

The embryonic period of development lasts from the:

Accepted Answer

The embryonic period of development lasts from the third through the eighth week after conception.

Question 15

The process termed cellular differentiation, which takes place during the embryonic period, leads directly to the development of the:

Accepted Answer

Cellular differentiation during the embryonic period results in the formation of the three primary germ layers: ectoderm, mesoderm, and endoderm, which are essential for the development of all tissues and organs in the body.

Question 16

The process by which stem cells become specific tissue types, such as skin or neurons occurs in the __________ period.

Accepted Answer

The process by which stem cells differentiate into specific tissue types, such as skin or neurons, primarily occurs during the embryonic period. This is when the basic structures of the organism are formed and cells begin to specialize.

Question 17

The placenta has two separate sets of __________, one going to and from the mother, and the other traveling to and from the baby.

Accepted Answer

The placenta contains two separate sets of blood vessels: one set connects to the mother's blood supply, and the other connects to the baby's blood supply, facilitating nutrient and gas exchange.

Question 18

The layer of the embryo that gives rise to the lungs, liver, and pancreas is called the:

Accepted Answer

The endoderm is the innermost layer of the embryo and it gives rise to the lining of the digestive and respiratory systems, including the lungs, liver, and pancreas.

Question 19

The germinal period lasts for __________ following fertilization.

Accepted Answer

The germinal period lasts for two weeks following fertilization. During this time, the zygote travels down the fallopian tube and undergoes cell division to form a blastocyst. The blastocyst implants into the uterine wall at the end of the germinal period.

Question 20

The outer layer of the embryo is the __________, which gives rise to the skin, hair, and nervous system.

Accepted Answer

The ectoderm is the outermost layer of the embryo, which develops into the skin, hair, and nervous system.

Quiz 3: Pregnancy and Prenatal Development