Syndactyly and esophageal atresia develop because of a lack of embryonic cell
A. apoptosis
B. fusion
C. migration
D. differentiation
E. invagination
A
Syndactyly and esophageal atresia result from a lack of apoptosis, which is supposed to occur during the formation of the fingers or esophagus. Fingers are formed by programmed death of cells in the embryonic limb bud, and if these cells do not die, the fingers remain fused to each other. Apoptosis in the central part of the solid foregut strand of cells leads to the formation of the esophageal lumen, and if it does not occur, the esophagus remains atretic.
You might also like to view...
How does a xeromammogram differ from a mammogram?
A) The xeromammogram shows a three-dimensional image of the breast rather than a one-dimensional image. B) The xeromammogram is produced by nuclear medicine technology rather than by x-ray technology. C) The xeromammogram image is printed on dry paper rather than on x-ray film. D) The xeromammogram uses a magnetic field to scan the breast rather than x-ray beams.
Medial means toward the midline or center of the body
Indicate whether the statement is true or false.
Which of the following is NOT a type of direct transmission?
A. Transmission by means of inanimate objects B. Contact between body surfaces C. Droplet spread D. Fecal-oral spread
Write the correct meaning for PP:
What will be an ideal response?