Embryology

Question 1

From which embryological structure does the definitive kidney develop?

Answer 1

Metanephros

Question 2

What does the ureter develop from?

Answer 2

Ureteric Bud

Question 3

Intermediate Plate Mesoderm develops what

Answer 3

Urogenital System (Kidneys and Repro)

Question 4

Lateral Plate Mesoderm develops

Answer 4

Body Cavity

Question 5

Paraxial Mesoderm develops

Answer 5

Somites

Question 6

What is Allantois

Answer 6

Outpouching of endoderm at hindgut that extends into body stalk

Question 7

What is Cloaca

Answer 7

single posterior opening

Question 8

The Cloaca gets divided into

Answer 8

Rectum Posteriorly and Urogenital Sinus Anteriorly

Question 9

Urogenital septum divides the cloaca into rectum

Answer 9

posteriorly and urogenital sinus anteriorly

Question 10

Allantois gets obliterated at birth to form

Answer 10

Urachus

Question 11

Urogenital sinus forms

Answer 11

Urinary Bladder

Question 12

How many sets of kidneys develop sequentially during nephrogenesis

Answer 12

3 Sets

Question 13

How many sets of kidneys develop sequentially during nephrogenesis

Answer 13

3 Sets

Question 14

When does intermediate mesoderm become pronephros

Answer 14

Early in fourth week

Question 15

What makes up the Pronephros

Answer 15

Pronephric duct + rudimentary pronephric tubules

Question 16

Pronephric duct drains into

Answer 16

Cloaca

Question 17

When does the Pronephros mainly degenerate by

Answer 17

5th Week

Question 18

In week 4 what does the pronephric duct become

Answer 18

Mesonephric Duct

Question 19

Mesonephric tubules drain into

Answer 19

Mesonephric Duct

Question 20

Mesonephros functions as kidney for how many weeks

Answer 20

4

Question 21

What is the Metanephros also known as

Answer 21

Definitive Kidney

Question 22

When does the metanephros start to develop from

Answer 22

Week 5

Question 23

When does the metanephros start to function from

Answer 23

Week 9

Question 24

The metanephros consists of

Answer 24

Ureteric Bud that comes off Mesonephric Duct

Metanephric Mesoderm

Question 25

What is the most caudal part of intermediate mesoderm

Answer 25

Metanephric mesoderm

Question 26

Much of the mesonephros will be incorporated into the

Answer 26

developing gonad

Question 27

The mesonephric tubules become the

Answer 27

Rete Testis

Question 28

The mesonephric duct becomes the

Answer 28

Vas Deferens

Question 29

In females the mesnephros become the

Answer 29

ovary but tubules and mesonephric duct degenerate

Question 30

The ureteric bud undergoes repeated branching where

Answer 30

Distal end

Question 31

The stalk of the ureteric bud becomes the

Answer 31

Ureter

Question 32

The expanded cranial end of ureteric bud becomes

Answer 32

renal pelvis

Question 33

The first 4 generations of branches of ureteric bud become confluent to become

Answer 33

major calyces

Question 34

The next 4 generations of ureteric bud form

Answer 34

minor calyces

Question 35

The remaining generations after the first 8 generations of ureteric bud become

Answer 35

Collecting Tubules

Question 36

The ureteric bud and metanephric mesoderm do what to each other

Answer 36

reciprocally induce each other

Question 36

The ureteric bud and metanephric mesoderm do what to each other

Answer 36

reciprocally induce each other

Question 37

The nephron is made up of

Answer 37

Renal Corpuscle and PCT + Loop of Henle + DCT

Question 38

The uriniferous tubule is made up of

Answer 38

Nephron and Collect Duct

Question 39

Nephron develops from

Answer 39

Metanephric Mesoderm

Question 40

Collecting Duct and Calyces, Pelvis and Ureter develop from

Answer 40

Ureteric Bud

Question 41

Hilum of kidney rotates from

Answer 41

Ventral to Medial (90 Degrees)

Question 42

Ascent of kidneys stop when they come in contact with

Answer 42

Adrenal Glands

Question 43

Intermediate Mesoderm develops into

Answer 43

Rudimentary Pronephros in Neck Week 4

Question 44

Ureteric Bud grows out of caudal end of

Answer 44

Mesonephric Duct and branches to form Renal Pelvis, Calyces and Collect Duct

Question 45

The ureteric bud and metanephric mesoderm do what to each other

Answer 45

Reciprocally induce each other

Question 46

Final position of hilum

Answer 46

Medial