David Ranz
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Quiz sobre BCC Embryology 1, criado por David Ranz em 19-03-2019.

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BCC Embryology 1

Questão 1 de 30

1

Haploid nuclei that fuse at fertilization are called:



Selecione uma das seguintes:

  • homunculi


  • mitotic figures

  • centrioles

  • nucleoli

  • pronuclei

Explicação

Questão 2 de 30

1

The first week of human development is characterized by formation of the:

Selecione uma das seguintes:

  • inner cell mass

  • hypoblast

  • trophoblast

  • blastocyst

  • all of the above

Explicação

Questão 3 de 30

1

During implantation, the blastocyst:

Selecione uma das seguintes:

  • implants in the endometrium

  • usually attaches to endometrial epithelium at its embryonic pole

  • usually implants in the posterior wall of the body of the uterus

  • causes change in the endometrial tissues

  • all of the above are correct

Explicação

Questão 4 de 30

1

Capacitation of the sperm:

Selecione uma das seguintes:

  • is caused by the zona pellucida

  • occurs in the male

  • prevents polyspermy

  • is essential for fertilization

  • removes the head of the sperm

Explicação

Questão 5 de 30

1

The early stages of cleavage are characterized by:

Selecione uma das seguintes:

  • formation of a hollow ball of cells

  • formation of the zona pellucida

  • increase in the size of the cells in the zygote

  • increase in the number of cells in the zygote

  • none of the above

Explicação

Questão 6 de 30

1

The amniotic cavity develops:

Selecione uma das seguintes:

  • on the tenth day

  • within the outer cell mass

  • within the inner cell mass near the cytotrophoblast

  • in extraembryonic mesoderm

  • none of the above

Explicação

Questão 7 de 30

1

During the second week of development, the trophoblast differentiates into:

Selecione uma das seguintes:

  • syncytiotrophoblast

  • ectoderm

  • intraembryonic mesoderm

  • yolk sac (secondary)

Explicação

Questão 8 de 30

1

The first two intraembryonic germ layers to differentiate are the:

Selecione uma das seguintes:

  • ectoderm and hypoblast

  • epiblast and hypoblast

  • ectoderm and endoderm

  • ectoderm and mesoderm

Explicação

Questão 9 de 30

1

The blastocoele becomes the:

Selecione uma das seguintes:

  • amniotic cavity

  • extraembryonic coelom

  • primary yolk sac

  • chorionic cavity

  • secondary cavity

Explicação

Questão 10 de 30

1

The bilaminar germ disc:

Selecione uma das seguintes:

  • consists of epiblast and mesoblast

  • is derived from the outer cells of the morula

  • forms the embryo proper

  • synthesizes human chorionic gonadotropin, HCG

Explicação

Questão 11 de 30

1

The primitive streak first appears at the beginning of the _____ week.

Selecione uma das seguintes:

  • first

  • second

  • third

  • fourth

  • fifth

Explicação

Questão 12 de 30

1

Which of the following structures is believed to be a primary organizer or inducer during organogenesis?

Selecione uma das seguintes:

  • somites

  • notochord

  • metanephric blastema

  • lens placode

  • none of the above

Explicação

Questão 13 de 30

1

Cells from the primitive streak DO NOT become:

Selecione uma das seguintes:

  • endoderm

  • intermediate mesoderm

  • paraxial mesoderm

  • lateral plate mesoderm

  • amnioblasts

Explicação

Questão 14 de 30

1

The primitive streak:

Selecione uma das seguintes:

  • is derived from the outer cells of the morula

  • is formed during the second week in development

  • persists as the cloacal membrane

  • is the site of involution of epiblast cells to form mesoderm

  • was done in a bathing suit, for those who remember streaking

Explicação

Questão 15 de 30

1

In the third week of human embryonic development:

Selecione uma das seguintes:

  • the amnion appears

  • a bilaminar embryonic disc is formed

  • the body stalk moves ventrally and joins with the yolk sac stalk to form the umbilical cord

  • the neural plate is induced by the notochordal process and associated mesoderm

  • the uteroplacental circulation is established

Explicação

Questão 16 de 30

1

During development, the notochordal process:

Selecione uma das seguintes:

  • arises from involuting endodermal cells

  • extends from the prochordal plate to the primitive node

  • is involved in the induction of the primitive gut

  • becomes the appendicular skeleton

Explicação

Questão 17 de 30

1

The following organs are derived from mesoderm EXCEPT:

Selecione uma das seguintes:

  • skeletal musculature

  • musculature of blood vessels

  • cardiac musculature

  • suprarenal cortex

  • suprarenal medulla

Explicação

Questão 18 de 30

1

Somites:

Selecione uma das seguintes:

  • differentiate into myotomes which give rise to skeletal muscle in trunk and limbs

  • differentiate into sclerotomes which give rise to vertebrae

  • arise from segmentation of the paraxial mesoderm

  • differentiate into myotomes which give rise to skeletal muscle of the limbs

  • all of the above are correct

Explicação

Questão 19 de 30

1

Almost all of the internal organs are well laid down at _____ months.

Selecione uma das seguintes:

  • 1

  • 2

  • 3

  • 4

  • 5

Explicação

Questão 20 de 30

1

The notochord is replaced by the:

Selecione uma das seguintes:

  • ependyma

  • nucleus pulposus

  • spinal canal

  • dorsal roots

  • spinal cord

Explicação

Questão 21 de 30

1

After folding of the head region, the structure lying just caudal to the pericardial cavity is the:

Selecione uma das seguintes:

  • developing heart

  • connecting stalk

  • primitive streak

  • liver

  • septum transversum

Explicação

Questão 22 de 30

1

The fact that general and special sensory information from the posterior part of the tongue is carried by glossopharyngeal nerve indicates that this part of tongue is from branchial arch _____.

Selecione uma das seguintes:

  • I

  • II

  • III

  • IV

  • VI

Explicação

Questão 23 de 30

1

As a resident in pediatrics, you are called to see a newborn who has a unilateral cleft lip and a unilateral cleft of the primary palate. This condition is most likely the result of:

Selecione uma das seguintes:

  • failure of fusion of the mandibular prominences

  • failure of fusion of the medial nasal processes

  • failure of fusion of the maxillary prominence with the medial nasal prominence

  • failure of fusion of the lateral palatine processes with the nasal septum

  • failure of fusion of the paired lateral palatine processes.

Explicação

Questão 24 de 30

1

Which of the following structures is NOT part of the first branchial arch?

Selecione uma das seguintes:

  • malleus

  • mandibular process

  • sphenomandibular ligament

  • stylohyoid ligament

  • maxillary process

Explicação

Questão 25 de 30

1

Which structures are derived from the intermaxillary segment of the embryonic face?

Selecione uma das seguintes:

  • philtrum

  • anterior portion of the palate

  • anterior portion of the upper jaws

  • upper incisor teeth

  • all of the above are correct

Explicação

Questão 26 de 30

1

The foramen cecum of the adult tongue:

Selecione uma das seguintes:

  • marks the point of embryonic evagination of the thymus gland

  • divides the tongue into two parts, an anterior one-third and a posterior two-thirds

  • marks the point of embryonic evagination of the thyroid gland

  • develops into taste buds

  • has no embryologic significance

Explicação

Questão 27 de 30

1

Each pharyngeal arch includes:

Selecione uma das seguintes:

  • derivatives of ectodermal neural crest cells

  • an aortic arch artery

  • a mesodermal core from paraxial mesoderm

  • a cranial nerve

  • all of the above

Explicação

Questão 28 de 30

1

Which of the following are associated with the 2nd pharyngeal arch?

Selecione uma das seguintes:

  • the malleus bone

  • facial nerve

  • glossopharyngeal muscle

  • the lower portion of the hyoid bone

  • anterior belly of digastric

Explicação

Questão 29 de 30

1

The tracheoesophageal septum separates the:

Selecione uma das seguintes:

  • laryngotracheal tube and nasopharynx

  • esophagus and nasopharynx

  • laryngotracheal tube and esophagus

  • laryngotracheal tube and oropharynx

  • esophagus and oropharynx

Explicação

Questão 30 de 30

1

A 28-year-old woman who does not know that she is pregnant undergoes a chemotherapy treatment at the end of her 1st week of pregnancy. Chemotherapy is associated with slowing the rate of mitosis in exposed cells, which is good in cancer treatment. However, this treatment may also have a negative influence on the implantation and growth of an embryo. In which of the following layers would a lowered rate of cell division be most likely to hinder implantation of the blastocyst?

Selecione uma das seguintes:

  • Amnioblast

  • Epiblast

  • Hypoblast

  • Cytotrophoblast

  • Syncytiotrophoblast

Explicação