Embryo

Question 1

De que capas se desarrolla el skeletal system?

Answer 1

Mesoderm y neural crest cells

Question 2

En que semana el paraxial mesoderm se convierte en somita?

Answer 2

3rd week

Question 3

What is mesenchyma?

From what type of cells it is derived?

Answer 3

Loosely organized connective tissue

Mesodermal cells and neural crest cells

Question 4

Genes that play essential role in the migration and differentiation of neural crest cells

Answer 4

Homeobox genes

Question 5

En que semana comienza aparecer el cartilago?

Answer 5

5th week

Question 6

Area of condense mesenchyme where cartilage develops

Answer 6

Chondrification centers

Question 7

Way of bone developments where mesenchymal cells form bone directly

Answer 7

Ossification or intramembranous formation

Question 8

Type of bone development where bone replaces cartilage

Answer 8

Endochondral ossification

Question 9

Majos type of collagen found in bone EM

Answer 9

Type 1 fibers

Question 10

Cual es el primary center of ossification?

Cuando comienza la ossificacion?

Answer 10

Diaphysis

End of embryonic period

Question 11

Secondary center of ossification?

Parte que aporta al crecimiento del hueso?

Answer 11

Epiphysis

Epiphyseal cartilage plates
-cuando estos se osifican en hueso NO crece más

Question 12

Homopoietic cells

Answer 12

Encargadas de blood formation in bone marrow

Question 13

Semana en que el sclerotoma comienza a change position para rodear el neural tube and notochord

Answer 13

4th week

NO es migración activa si no differential growth

Question 14

Semana en que chondrification centers aparecen en cada mesenchymal vertebra

Answer 14

6th week

Question 15

At birth, each vertebra consist of?

Answer 15

3 bony parts connected by cartilage

Question 16

Neurocentral joints

Answer 16

Cartilago que une los 3 bony parts de las vertebras al nacer. Permite que los vertebral arches crezcan segun el spinal cord enlarges

Question 17

Hemivertebra

Answer 17

Fallo en formacion de uno de los ossification centers de la vertebra

Por lo tanto no se desarrolla bien

Causa SCOLIOSIS

Question 18

Rachischisis

Answer 18

Fallo en la fusion de los neural folds.

Puede ser causada por falta de induccion por parte del notochord o teratogenos

Question 19

Acrania

Answer 19

Calvaria esta ausente

Associada con anencephaly

Question 20

Craniosynostosis

Answer 20

Sellamiento prematuro de alguna de las suturas craniales

Question 21

Scaphocephaly

Answer 21

Type of craniosynostosis en que el sagittal suture se cierra de forma prematura

Question 22

Muscular system se desarrolla del ___________ excepto por los musculos de ______________ que vienen del ___________________

Answer 22

Mesoderm

Iris

Neuroectoderm

Question 23

Genes MyoD and Myf-5

Answer 23

Encargados del desarrollo de musculos epa e hypaxiales

Question 24

Muscle growth durung development results from the fusion of _____________ and ____________

Answer 24

Myoblast and myotubes

Question 25

Smooth muscle from the gut differentiate from __________________

Smooth muscle of the walls of blood and lymph vessels diferentiate from __________

Answer 25

Splanich mesoderm

Somatic mesoderm

Question 26

Zona del limb en desarrollo en que se produce retinoic acid (vitamin A) wich initiates the expression of_____?

Answer 26

Zone of polarizing activity (ZPA)

SHH