Embryology
During gastrulation, which of the following germ layers is formed?
a) Ectoderm
b) Mesoderm
c) Endoderm
d) All of the above
d) All of the above
Which cell type produces collagen fibers in connective tissue?
a) Chondrocytes
b) Fibroblasts
c) Osteocytes
d) Macrophages
b) Fibroblasts
Which bone is located in the upper arm?
a) Radius
b) Ulna
c) Humerus
d) Clavicle
c) Humerus
During lateral folding of the embryo, which structure becomes incorporated into the embryo to form the primitive gut tube?
a) Amniotic cavity
b) Chorionic cavity
c) Yolk sac
d) Allantois
C) Yolk sac
Which type of epithelium lines the urinary bladder?
a) Stratified squamous epithelium
b) Simple columnar epithelium
c) Transitional epithelium
d) Pseudostratified columnar epithelium
c) Transitional epithelium
4. Neural crest cells contribute to the formation of all the following structures EXCEPT:
a) Células de Schwann
b) Médula suprarrenal
c) Núcleo pulposo
d) Melanocitos
c) Núcleo pulposo
Which junction prevents the passage of molecules between adjacent epithelial cells?
a) Desmosome
b) Gap junction
c) Tight junction
d) Hemidesmosome
c) Tight junction
No During the third week of development, which structure is primarily responsible for inducing the formation of the neural plate?
a) Prechordal plate
b) Notochord
c) Oropharyngeal membrane
d) Somites
B) notochord
Type II pneumocytes are primarily responsible for:
a) Gas exchange
b) Phagocytosis of debris
c) Surfactant production
d) Formation of the air-blood barrier
c) Surfactant production
Failure of closure of the anterior neuropore most likely results in:
a) Spina bifida occulta
b) Myelomeningocele
c) Anencephaly
d) Encephalocele
c) Anencephaly
Which collagen type is the main structural component of reticular fibers?
a) Type I
b) Type II
c) Type III
d) Type IV
c) Type III