David Ranz
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Quiz am BCC Embryology 1, erstellt von David Ranz am 19/03/2019.

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David Ranz
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BCC Embryology 1

Frage 1 von 30

1

Haploid nuclei that fuse at fertilization are called:



Wähle eine der folgenden:

  • homunculi


  • mitotic figures

  • centrioles

  • nucleoli

  • pronuclei

Erklärung

Frage 2 von 30

1

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

Wähle eine der folgenden:

  • inner cell mass

  • hypoblast

  • trophoblast

  • blastocyst

  • all of the above

Erklärung

Frage 3 von 30

1

During implantation, the blastocyst:

Wähle eine der folgenden:

  • 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

Erklärung

Frage 4 von 30

1

Capacitation of the sperm:

Wähle eine der folgenden:

  • is caused by the zona pellucida

  • occurs in the male

  • prevents polyspermy

  • is essential for fertilization

  • removes the head of the sperm

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Frage 5 von 30

1

The early stages of cleavage are characterized by:

Wähle eine der folgenden:

  • 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

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Frage 6 von 30

1

The amniotic cavity develops:

Wähle eine der folgenden:

  • on the tenth day

  • within the outer cell mass

  • within the inner cell mass near the cytotrophoblast

  • in extraembryonic mesoderm

  • none of the above

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Frage 7 von 30

1

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

Wähle eine der folgenden:

  • syncytiotrophoblast

  • ectoderm

  • intraembryonic mesoderm

  • yolk sac (secondary)

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Frage 8 von 30

1

The first two intraembryonic germ layers to differentiate are the:

Wähle eine der folgenden:

  • ectoderm and hypoblast

  • epiblast and hypoblast

  • ectoderm and endoderm

  • ectoderm and mesoderm

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Frage 9 von 30

1

The blastocoele becomes the:

Wähle eine der folgenden:

  • amniotic cavity

  • extraembryonic coelom

  • primary yolk sac

  • chorionic cavity

  • secondary cavity

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Frage 10 von 30

1

The bilaminar germ disc:

Wähle eine der folgenden:

  • consists of epiblast and mesoblast

  • is derived from the outer cells of the morula

  • forms the embryo proper

  • synthesizes human chorionic gonadotropin, HCG

Erklärung

Frage 11 von 30

1

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

Wähle eine der folgenden:

  • first

  • second

  • third

  • fourth

  • fifth

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Frage 12 von 30

1

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

Wähle eine der folgenden:

  • somites

  • notochord

  • metanephric blastema

  • lens placode

  • none of the above

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Frage 13 von 30

1

Cells from the primitive streak DO NOT become:

Wähle eine der folgenden:

  • endoderm

  • intermediate mesoderm

  • paraxial mesoderm

  • lateral plate mesoderm

  • amnioblasts

Erklärung

Frage 14 von 30

1

The primitive streak:

Wähle eine der folgenden:

  • 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

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Frage 15 von 30

1

In the third week of human embryonic development:

Wähle eine der folgenden:

  • 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

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Frage 16 von 30

1

During development, the notochordal process:

Wähle eine der folgenden:

  • 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

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Frage 17 von 30

1

The following organs are derived from mesoderm EXCEPT:

Wähle eine der folgenden:

  • skeletal musculature

  • musculature of blood vessels

  • cardiac musculature

  • suprarenal cortex

  • suprarenal medulla

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Frage 18 von 30

1

Somites:

Wähle eine der folgenden:

  • 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

Erklärung

Frage 19 von 30

1

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

Wähle eine der folgenden:

  • 1

  • 2

  • 3

  • 4

  • 5

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Frage 20 von 30

1

The notochord is replaced by the:

Wähle eine der folgenden:

  • ependyma

  • nucleus pulposus

  • spinal canal

  • dorsal roots

  • spinal cord

Erklärung

Frage 21 von 30

1

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

Wähle eine der folgenden:

  • developing heart

  • connecting stalk

  • primitive streak

  • liver

  • septum transversum

Erklärung

Frage 22 von 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 _____.

Wähle eine der folgenden:

  • I

  • II

  • III

  • IV

  • VI

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Frage 23 von 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:

Wähle eine der folgenden:

  • 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.

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Frage 24 von 30

1

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

Wähle eine der folgenden:

  • malleus

  • mandibular process

  • sphenomandibular ligament

  • stylohyoid ligament

  • maxillary process

Erklärung

Frage 25 von 30

1

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

Wähle eine der folgenden:

  • philtrum

  • anterior portion of the palate

  • anterior portion of the upper jaws

  • upper incisor teeth

  • all of the above are correct

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Frage 26 von 30

1

The foramen cecum of the adult tongue:

Wähle eine der folgenden:

  • 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

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Frage 27 von 30

1

Each pharyngeal arch includes:

Wähle eine der folgenden:

  • derivatives of ectodermal neural crest cells

  • an aortic arch artery

  • a mesodermal core from paraxial mesoderm

  • a cranial nerve

  • all of the above

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Frage 28 von 30

1

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

Wähle eine der folgenden:

  • the malleus bone

  • facial nerve

  • glossopharyngeal muscle

  • the lower portion of the hyoid bone

  • anterior belly of digastric

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Frage 29 von 30

1

The tracheoesophageal septum separates the:

Wähle eine der folgenden:

  • laryngotracheal tube and nasopharynx

  • esophagus and nasopharynx

  • laryngotracheal tube and esophagus

  • laryngotracheal tube and oropharynx

  • esophagus and oropharynx

Erklärung

Frage 30 von 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?

Wähle eine der folgenden:

  • Amnioblast

  • Epiblast

  • Hypoblast

  • Cytotrophoblast

  • Syncytiotrophoblast

Erklärung

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