13-02 ALL EMBRYO I 2018 - Respi

Question 1

This divides foregut into pharyngeal gut of foregut & foregut proper

[embryonic gut]

Answer 1

respiratory diverticulum (aka “lung bud”)

[embryonic junction]

Question 2

This divides foregut & midgut parts/ derivatives

[embryonic gut]

Answer 2

ampulla of Vater

[embryonic junction]

Question 3

This divides midgut & hindgut parts/ derivatives

[embryonic gut]

Answer 3

“watershed area” (proximal 2/3rd’s & distal 3rd of transverse colon

[embryonic junction]

Question 4

This divides midgut into cephalic limb & caudal limb

[embryonic gut]

Answer 4

Yolk stalk of Yolk sac

[embryonic junction]

Question 5

Induces “lung bud” formation

[regulatory functions]

Answer 5

TBX-4

[vascular genes]

Question 6

Up regulates TBX-4

[regulatory functions]

Answer 6

Retinoic Acid

[vascular genes]

Question 7

Master gene for alveoli’s capillary vascular system formation

[regulatory functions]

Answer 7

vegf

[vascular genes]

Question 8

Arborization of primary bronchus to bronchial tree formation (from secondary bronchi to alveoli)

[regulatory functions]

Answer 8

FGF-8; EGF; TGF-b

[vascular genes]

Question 9

1st Pharynheal Arches (P.A.)

Answer 9

maxillae; mandible; incus; malleus

[adult derivatives: bone & cartilage formation (head & neck)]

Question 10

2nd Pharynheal Arches (P.A.)

Answer 10

superior half of Hyoid’s body & lesser horns of Hyoid; styloid process; & stapes

[adult derivatives: bone & cartilage formation (head & neck)]

Question 11

3rd Pharynheal Arches (P.A.)

Answer 11

inferior half of Hyoid’s body & greater horns of Hyoid

[adult derivatives: bone & cartilage formation (head & neck)]

Question 12

4th Pharynheal Arches (P.A.)

Answer 12

Thyroid & Epiglottic cartilages

mnemonic: 4T.E.=FORTE

[adult derivatives: bone & cartilage formation (head & neck)]

Question 13

5th Pharynheal Arches (P.A.)

Answer 13

will degenerate

[adult derivatives: bone & cartilage formation (head & neck)]

Question 14

6th Pharynheal Arches (P.A.)

Answer 14

corniculate; cuneiform; arytenoid; & cricoid cartilages

mnemonic: 6CACC=sex & cock

[adult derivatives: bone & cartilage formation (head & neck)]

Question 15

epithelia of internal linings of larynx, trachea, & bronchial tree

[adult derivative]

Answer 15

Endoderm

[specific germ layers]

Question 16

cartilages; muscular; & connective tissues of tracheobronchial tree

[adult derivative]

Answer 16

SPLANCHNIC Mesoderm of Lateral Plate Mesoderm

[specific germ layers]

Question 17

parietal pleura

[adult derivative]

Answer 17

SOMATIC Mesoderm of Lateral Plate Mesoderm

[specific germ layers]

Question 18

Visceral pleura

[adult derivative]

Answer 18

SPLANCHNIC Mesoderm of Lateral Plate Mesoderm

[specific germ layers]

Question 19

diaphragm

[adult derivative]

Answer 19

3rd to 5th Somites, Paraxial Mesoderm

[specific germ layers]

Question 20

MEMORIZE! Table for Maturation of the Lungs

Answer 20

MEMORIZE! Table for Maturation of the Lungs

Question 21

Swallow amniotic fluid irregularly

[developmental milestones]

Answer 21

10th week AOG

[app. earliest time appreciated during gestation]

Question 22

Micturate fetal urine irregularly

[developmental milestones]

Answer 22

8-11th week AOG

[app. earliest time appreciated during gestation]

Question 23

Swallow & Micturate regularly

[developmental milestones]

Answer 23

20th week AOG

[app. earliest time appreciated during gestation]

Question 24

Irregular respiratory movements

[developmental milestones]

Answer 24

14th-16th week AOG

[app. earliest time appreciated during gestation]

Question 25

Start of pulmonary surfactant production

[developmental milestones]

Answer 25

24th week AOG (end of 6th month AOG)

[app. earliest time appreciated during gestation]

Question 26

Enough production of pulmonary surfactant

[developmental milestones]

Answer 26

34th week AOG

[app. earliest time appreciated during gestation]

Question 27

“Physiologic Aspiration”

[developmental milestones]

Answer 27

G. 2 weeks before birth (for mature fetus)

[app. earliest time appreciated during gestation]

Question 28

most common tracheoesophageal fistula

Answer 28

“C” = 85.8% (refer to illustration)