Development Of The Urinary System Flashcards
The urinary system:
a) develops from the mesoderm
b) interacts during the development with the genital system
c) is of pure ectodermal origin
d) does not function before birth
A,b,
The development of the urinary system is characterized by:
a) three-phase system of organs that develop in time- and cranio-caudal succession
b) mainly of mesodermal origin
c) the interaction of somites and nonsegmented mesoderm
d) no production of urine before birth
A,b,c
The nephrogenic cord:
a) comes from ectodermal cells
b) give rise to all three types of organs during the urinary system development
c) is located only in the branchial region
d) disappears at the 3rd week of embryonic development
B
Pronephros:
a) produces urine before birth
b) appears in humans as rudimentary only
c) it develops in the 3rd week by decomposition of the pronephric part of nephrogenic cord
d) develops in the cranial and cervical section in extent of seven segments
B,c,d
During the pronephros development:
a) its extent cannot be defined exactly because at the time of origin of cervical
segments, the cranial segments become extinct
b) blocks of the desintegrated nephrogenic cord luminize to form tubules of pronephros
c) the pronephric duct is formed
d) urine is produced in the amniotic fluid
A,b,c
The pronephric duct:
a) stretches dorso-laterally through almost whole body
b) opens in the cloaca
c) is of ectodermal origin
d) contributes to the notochord development
A,b
Mesonephros:
a) develops from the nephrogenic cord
b) develops in the region ranging from the 6th cervical to 3rd lumbar somites
c) regresses before the 4th week of embryonic development
d) is of ectodermal origin
A,b
During the mesonephros development:
a) large amount of segments luminize in S-shaped mesonephric tubules
b) mesonephros disappear before the 3rd week of the embryonic development
c) the pronephros appears
d) the lining of urinary passages is formed by entoderm
A
Wolffian duct:
a) is fully luminized
b) drains the fluid secreted by mesophros
c) functions to drain the secreted fluid into the amniotic sac after extinction of
cloacal membrane
d) is of ectodermal origin
A,b,c
Wolffian duct:
a) originates within the segmented paraxial somitic mesoderm
b) functions to drain the secreted fluid into cloaca
c) is of entodermal origin
d) appears before the end of 2nd week of embryonic development
B
Metanephros:
a) are the definitive kidneys
b) have an ectodermal origin
c) start to develop directly from the pronephros
d) start to develop in the 2nd week of development
A
Metanephros:
a) are the primitive kidneys that develop in the cranial and cervical region and disappear completely
b) are of mesodermal origin
c) start to develop in the form of a diverticle from the Wolffian duct
d) start to develop in the 3rd week of development
B,c
The metanephric bud:
a) grows against sacral region of the nephrogenic cord
b) is a diverticle of the Wolffian duct
c) luminizes in a narrow canaliculus
d) is a part of pronephros
A,b,c
The metanephric bud:
a) is a diverticle of the pronefros
b) luminizes in a narrow canaliculus
c) forms the primordium of the ureter and the primitive pelvis
d) regresses completely before the end of the 3rd week of the embryonic development
B,c
The metanephric bud:
a) grows and branches in many collecting tubules
b) contributes to the formation of the draining urinary system
c) becomes covered by the tissue of the nephrogenic cord
d) regresses completely before the end of the 3rd week of the embryonic development
A,b,c
