Human Embryology Final 1997

Front 1

The extraembrynic mesoderm is derived from:

Back 1

Cytotrophoblast and Hypoblast

Front 2

Syncytiotrophoblast lines these structures (4)

Back 2

Placental membrane, intervillous space, tertiary villi, and placental septae

Front 3

The flap type valve of the foramen ovale is formed by the

Back 3

lower part of the septum primum

Front 4

the celiac trunk and superior and inferior mesenteric arteries come from

Back 4

vitelline arteries

Front 5

The smooth wall of the left atrium comes from

Back 5

pulmonary veins

Front 6

Is incorporated into the right venticle as infundibulum

Back 6

bulbous cordis

Front 7

Posterior (dorsal) roots of the spinal nerve are derived from

Back 7

neural crest

Front 8

This causes gagging and choking of infants when fed and excess air in the stomach. It is not associated with polyhydraminos

Back 8

tracheo-esophageal fistula

Front 9

Is associated with defective diaphragmatic musculature

Back 9

Diaphragmatic eventration

Front 10

Defective pleuropericardial membranes are associated with

Back 10

congenital pericardial defects

Front 11

Is invaded by bronchial lung buds

Back 11

pericardioperitoneal canals

Front 12

The largest contribution to the adult diaphragm comes from:

Back 12

Septum Transversum

Front 13

Condition in which the myenteric ganglion cells are absent distal to the dilated segment of the colon

Back 13

Aganglionic Megacolon (Hirschprung's disease)

Front 14

Enlargement of the facial region during childhood results principally from from an increase in the size of:

Back 14

paranasal sinues

Front 15

Muscles of facial expression arise from

Back 15

hyoid arch, second branchial arch

Front 16

The pineal gland is formed from

Back 16

ectoptic skeletal muscle

Front 17

The spincter pupillae muscle is formed from:

Back 17

optic cup neuroectoderm

Front 18

Somitomeres come from

Back 18

paraxial mesoderm

Front 19

Name four structures of placodal origin

Back 19

nerve fibers of olfactory epithelium, lens, otocyst, membranous labyrinth

Front 20

Name four glands that come from ectoderm (4)

Back 20

Sebaceous gland, sweat gland, parotid gland, pituitary gland

Front 21

Mental retardation is often a consequence of intrauterine exposure to

Back 21

cytomeglovirus

Front 22

The primary sex cords are derived from

Back 22

celomic mesothelium

Front 23

Failure of the lateral palatine process to fuse with the intermaxillary segment produces

Back 23

an incomplete anterior cleft

Front 24

The male bladder develops from:

Back 24

the vesical portion of UG sinus

Front 25

The membranous urethra in the male

Back 25

pelvic portion of the UG sinus

Front 26

Contributes to the formation of both the bladder and the rectum

Back 26

urorectal septum

Front 27

Gives rise to the epithlium of the uterus

Back 27

paramesonephric ducts

Front 28

Gives rise to the corpora cavernosa of the clitoris

Back 28

Phallus

Front 29

The urethral plate is composed entirely of

Back 29

endodermal tissue

Front 30

Anterior lens epitheium is formed from

Back 30

surface ectoderm

Front 31

The ciliary muscles are formed from

Back 31

mesenchyme

Front 32

The optic nerve axons are formed from

Back 32

neural tube

Front 33

Induces otocyst (otic vesicle) development

Back 33

neural tube

Front 34

Forms the epithelium of the tympanic cavity

Back 34

endoderm