Podcast
Questions and Answers
During gastrulation, what is the primitive streak?
During gastrulation, what is the primitive streak?
- A thickened axial band of cells in the caudal half of the embryo (correct)
- The shallow primitive groove flanked by 2 primitive folds
- The migration of the superficial cells of the epiblast through the primitive streak
- The transformation of blastula to gastrula by formation of three germinal layers
What is the process of delamination during gastrulation?
What is the process of delamination during gastrulation?
- The transformation of blastula to gastrula
- The staining of specific areas of cells with non-toxic dyes
- The formation of the hypoblast (endoderm) from the lower layer of the germinal disc (correct)
- The migration of cells through the primitive streak to occupy a new position
What is involution during gastrulation?
What is involution during gastrulation?
- The formation of the primitive streak in the embryo
- The migration of the superficial cells of the epiblast
- The transformation of blastula to gastrula by formation of three germinal layers
- The migration of cells through the primitive streak to occupy a new position (correct)
What does gastrulation involve?
What does gastrulation involve?
Where does gastrulation occur in vertebrates?
Where does gastrulation occur in vertebrates?
What do blasula-maps reveal about vertebrates?
What do blasula-maps reveal about vertebrates?
During embryonic development, which cells form the ectoderm?
During embryonic development, which cells form the ectoderm?
What is the function of the notochord during embryonic development?
What is the function of the notochord during embryonic development?
Which layer forms the fetal membranes in mammals and birds?
Which layer forms the fetal membranes in mammals and birds?
From which cells does the notochord originate?
From which cells does the notochord originate?
What do the fetal membranes offer the embryo?
What do the fetal membranes offer the embryo?
What does organogenesis mean?
What does organogenesis mean?
Which layer forms the yolk sac in birds?
Which layer forms the yolk sac in birds?
What happens to the absorbed yolk sac at hatching in birds?
What happens to the absorbed yolk sac at hatching in birds?
Which layer together with somatic mesoderm forms somatopleure?
Which layer together with somatic mesoderm forms somatopleure?
What forms some cellular components of the born organism?
What forms some cellular components of the born organism?
