Which of the following statements about somite formation in the frog Xenopus is NOT TRUE? Select one:
a. Xenopus somites form every 50 minutes.
b. The dystroglycan cell adhesion complex is important for muscle cell elongation and alignment in Xenopus. c.
When cxcr4 is knocked down somite segmentation is completely perturbed.
d.Xenopus somites become progressively larger as the posterior axis elongates
. e. The extracellular matrix, laminin, is typically found around the somites and in the boundaries between somites.
The Somitogenesis in frog Xenopus
includes various changes in the cellular shapes which later leads
to the formation of somites starting from cells in the anterior end
towards posterior end. While moving there is deposition of
extracellular matrix in the form of laminin and fibronectin. This
causes segmentation of cells due to which formation of myotome
fibers (somites) occurs every 50 minutes.
The extracelleular matrix substance known as Dystroglycan is vital
in cytoskeletal organization, cell signaling, cellular stability
etc.
It has been found that the cells within the PSM become
progressively more elongated in the mediolateral axis as they near
the transition zone where somite formation will take place.
Therefore, the correct option is:d.Xenopus somites become progressively larger as the posterior axis elongates
Which of the following statements about somite formation in the frog Xenopus is NOT TRUE? Select...
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