Unit 2 Practice Quiz

Question 1

Which of the following is the prenatal diagnostic procedure that samples amniotic fluid?

Answer 1

Amniocentesis

Question 2

A blastocyst is a structure formed during prenatal development consisting of _____ cells and an inner mass of cells that finally develop into the embryo.

Answer 2

Trophoblast

Question 3

Congenital malformations are birth defects or developmental problems that are evident

Answer 3

at birth.

Question 4

An ectopic pregnancy has implantation directly occurring

Answer 4

outside the uterus.

Question 5

Which of the following structures is directly derived from the implanted blastocyst?

Answer 5

Embryo

Question 6

Which of the following is the CORRECT definition of histodifferentiation?

Answer 6

Development of specific tissue morphology

Question 7

Which of the following is the posterior part of the future digestive tract?

Answer 7

Hindgut

Question 8

The hypoblast layer is also considered part of which of the following structures?

Answer 8

Inferior layer of the bilaminar disc

Question 9

Where is the primitive streak located within the embryonic disc?

Answer 9

Middle

Question 10

Which of the following is the BEST term used for the embryonic layer located between the ectoderm and the endoderm?

Answer 10

Mesoderm

Question 11

Which of the following can be considered the process of reproductive cell production that ensures the CORRECT number of chromosomes?

Answer 11

Meiosis

Question 12

Which of the following is a viral infection that can serve as a teratogen and thus is transmitted by way of placenta from the pregnant woman to possibly cause injury to embryo?

Answer 12

Rubella

Question 13

Somites are paired cuboidal aggregates of cells directly differentiated from the

Answer 13

mesoderm.

Question 14

Which of the following is the BEST term used for a fertilized egg formed from the union of ovum and sperm?

Answer 14

Zygote

Question 15

What type of stain is tetracycline stain considered?

Answer 15

Intrinsic

Question 16

The pharyngeal or branchial apparatus includes the pharyngeal or branchial arches, the pharyngeal or branchial grooves and membranes, as well as the

Answer 16

pharyngeal pouches.

Question 17

The intermaxillary segment is a direct growth from which of the following paired processes on the inside of the stomodeum?

Answer 17

Medial nasal

Question 18

Which of the following initially primitive structures in the embryo is formed from the stomodeum?

Answer 18

Mouth

Question 19

Which numbered pharyngeal or branchial arch is the hyoid arch since it is located inferior to mandibular arch in the embryo?

Answer 19

Second

Question 20

Cervical cysts are developed when which of the following structures do NOT become obliterated upon maturation of the fetus?

Answer 20

Branchial or pharyngeal grooves

Question 21

Which of the following structure’s formation allows for the disappearance of Meckel cartilage?

Answer 21

Mandible

Question 22

Reichert cartilage is the cartilage within the second pharyngeal or branchial arch that eventually disappears, although parts of it form

Answer 22

a middle ear bone.

Question 23

Which of the following is considered a rudimentary embryonic pharyngeal or branchial arch?

Answer 23

Fifth

Question 24

Which pharyngeal or branchial arch in the embryo fuses with the fourth pharyngeal or branchial arch?

Answer 24

Sixth

Question 25

Where are the pharyngeal pouches located during development of the face and neck?

Answer 25

Between the pharyngeal or branchial arches

Question 26

How many pharyngeal pouches are present during development of the face and neck?

Answer 26

Four

Question 27

What is the largest number of pairs of pharyngeal or branchial arches that can be present during development of the face and neck?

Answer 27

Six

Question 28

Which of the following is considered the first pharyngeal or branchial arch?

Answer 28

Mandibular arch

Question 29

Which pharyngeal or branchial arch is responsible for parts of the future hyoid bone?

Answer 29

Third

Question 30

Where is the frontonasal process located during development of the face?

Answer 30

Cephalic end of the embryo

Question 31

Where is the tuberculum impar located in the embryo during development of the face and neck?

Answer 31

Midline

Question 32

From which pharyngeal or branchial arch during development of the face and neck does the epiglottic swelling develop?

Answer 32

Fourth

Question 33

The copula is formed from the third and fourth pharyngeal or branchial arches that later overgrows the _____ arches to form tongue base.

Answer 33

second

Question 34

The copula is formed from the third and fourth pharyngeal or branchial arches that later overgrows the _____ arches to form tongue base.

Answer 34

second

Question 35

Which of the following forms the base of the tongue during development?

Answer 35

Tuberculum impar

Question 36

Which of the following cell types is known to directly influence the ectomesenchyme?

Answer 36

Neural crest cells