Spom 1 Embryology

Front 1

What system grows at a faster rate than the body as a whole from the fetal stage onwards?

Back 1

Muscular system

Front 2

The formation of what does not require epiblast?

Back 2

syncytiotrophoblast

Front 3

During what phase of fertilization does the nucleus enter the cytoplasm of the egg?

Back 3

Fusion

Front 4

The most common site of abnormal implantation is what?

Back 4

Fallopian tube

Front 5

Name structures that if the embryonic endoderm was defective would be affected?

Back 5

Digestive system-Gi tract and all associated glands

Front 6

The total range of developmental possibilities that a cell is capable of realizing is referred to as?

Back 6

Potency

Front 7

What is the least common cause of congenital anomalies?

Back 7

Chromosomal abnormalities

Front 8

Congenital anomilies occur at the highest rate during which developmental time period?

Back 8

3-10 weeks post fertilization

Front 9

What phase of fertilization initiates the zona reaction in the egg?

Back 9

Fusion

Front 10

The hypoblast of the embryonic disc gives rise to the?

Back 10

Pre-chordal plate

Front 11

What structure is not derived from cells that migrate into and proliferate in the primitive streak?

Back 11

Notochord process

Front 12

During development, cavitation within which cell layer produces the body (coelomic) cavity?

Back 12

Lateral plate mesoderm

Front 13

during embryonic folding, the transverse folding of the somatopleure forms?

Back 13

the body wall of the embryo

Front 14

Persistance of the primitive streak cells in the developing embryo can cause which of the following anomalies?

Back 14

saccrococcygeal teratoma

Front 15

During delivery, two male twins present sharing the same placenta and chorionic sac but having their own amniotic sacs, these twins most likely resulted from

Back 15

division of the inner cell mass from one fertilized egg

Front 16

If the epaxial myotome (epimere) did not form, which of the following muscles would most likely fail to develope?

Back 16

splenius capitus and cervicis

Front 17

What is not derived from the cartilaginous rod, interzone, or perichondrium during limb development?

Back 17

Muscle tendons

Front 18

What system has the greatest decrease in growth from birth to adulthood when compared to total body weight?

Back 18

CNS

Front 19

Spontaneous abortions occur at the highest rate during which of the following developmental time periods?

Back 19

First 2 weeks post fertilization

Front 20

The cause of most congenital anomalies can be attributed to?

Back 20

Unknown factors

Front 21

During which phase of fertilization does the sperm release its enzymes?

Back 21

Acrosomal reaction

Front 22

During development cavitation, within which cell layer produces the chorionic cavity?

Back 22

Extraembryonic mesoderm

Front 23

During development, the notochord does what?

Back 23

Causes the neural plate to role up to form a neural tube

Front 24

During embryonic folding, the transverse folding of the splanchopleure and its fusion in the ventral midline

Back 24

establishes the gut of the embryo

Front 25

What congenital condition is most likely to occur if the axial mesoderm in the tail region of the embryo fails to form?

Back 25

sirenomelus

Front 26

The dermatome pattern seen in the skin is derived from?

Back 26

Somite

Front 27

During vertebrae development, the bodies of the vertebrae are derived from

Back 27

the dense and loose sclerotome of one somite

Front 28

If the ventral muscle mass in the limb bud was damaged, which of the following developing muscles would be affected?

Back 28

Pronator teres

Front 29

What structure is not derived form interzone that forms in the mesodermal rod during limb development?

Back 29

Joint capsule