UG-embryology Flashcards
where in the 18-day old embryo do the kidneys originate from? A-paraxial mesoderm B-splanchnopleuric mesoderm C-somatopleuric mesoderm D-Intermediate mesoderm
D
what is the destiny of the pronephros?
A-it will eventually become the definitive kidney
B-it will eventually become the definitive ureter/ collecting system
C-it will eventually become the cloaca
D-non-its transitionary and non-functional
D
which structure becomes the definitive kidney? A-pronephros B-mesonephros C-metanephros D-wolffian ducts
C
why are horseshoe kidneys in the pelvis?
A-failure of reciprocal induction causes failure to ascend
B-the blood supply arises from iliac arteries instead of the aorta
C-isthmus gets trapped by the inferior mesenteric artery
D-lack of testosterone causes failure to ascend
C
the trigone of the bladder is formed by…?
A-fusion of mesonephric (Wolffian) ducts
B-fusion of paramesonephric (Mullerian) ducts
C-thickening of the urogenital sinus
D-condensation of urachus
A
what are the definitive structures of the mesonephric (Wolffian) ducts?
A-bladder, prostate and external genitalia
B-ureter, major and minor calyces
C-fallopian tubes, uterus and upper 1/3 of vagina
D-seminal vesicles, vasa defferentia and epididymis
D
what are the definitive structures of the paramesonephric (Mullerian) ducts?
A-bladder, prostate and external genitalia
B-ureter, major and minor calyces
C-fallopian tubes, uterus and upper 1/3 of vagina
D-seminal vesicles, vasa defferentia and epididymis
C
which of the following is a remnant of the Mullarian (paramesonephric) ducts in the male? A-appendix testis B-Tunica vaginalis C-Tunica albuginea D-Gubernaculum
A
which of the following is a remnant of the Wolffian (mesonephric) ducts in the female? A-ovarian cyst B-garter's cyst C-cervical os D-round ligament
B
which hormone is responsible for the differentiation of the mesonephric ducts into the male internal sexual organs? A-SRY protein B-testosterone C-dihydrotestosterone D-antimullarian hormone
B
which hormone is responsible for the differentiation of the male external genitalia? A-SRY protein B-testosterone C-dihydrotestosterone D-antimullarian hormone
C
which of the following statements is correct in the developing female external genitalia?
A-genital tubercle becomes the clitoris
B-genital swelling becomes the labia minora
C-urethral folds become the labia majora
D-cloacal membrane becomes the urethral orifice
A
Which of the following statements is correct in the developing male external genitalia?
A-genital tubercle becomes scrotum
B-genital swelling becomes the penis (corpus cavernosum)
C-urethral folds become the corpus spongiosum (urethra)
D-the cloacal membrane becomes penile glans
C
where is the entire UG system derived from?
intermediate mesoderm
what does the intermediate mesoderm form either side of the developing aorta?
a urogenital ridge
what does the nephrogenic cord (part of UG ridge) develop into?
- pronephros
- mesonephros
- metanephros
when does the pronephros develop?
week 4
what happens to the pronephros as the mesonephros develops?
it degrades
which weeks does the mesonephros function between?
6-10
what is the mesonephros made up of?
- mesonephric (wolffian) duct
- mesonephric tubules
what does the metanephros form?
mature kidney
when is the metanephros formed?
week 5
what is the metanephros made up of?
- ureteric bud
- metanephric blastema
what does the ureteric bud give rise to (4)?
urine-secreting system including: ->collecting ducts ->minor and major calyces ->renal pelvis ->ureter
