With the help of suitable diagrams describe the process of neurulation in frog.
How does it differ from neurulation in chick?
- Neurulation in Amphibians ie frog - The first step in the neurulation process is the flattening and thickening of dorsal ectoderm to form neural plate. The plate of cells differs from the rest of ectoderm cells in that they have changed shape and appear more columnar. The edges of the neural plate then rise above along the rest of the neural plate to form neural folds (Fig. b) . The neural folds are now found along the two flanks of a central depression called neural groove. The neural groove extends along the entire mid dorsal line of the embryo. Eventually the neural folds meet in the middle above the deepening neural groove and fuse to form the neural tube (Fig.d. e). At the time of rolling of neural plate to form the neural tube, the neuroepithelial cells at the lateral folds of the neural plate develop constrictions at their apical edges. This changes the shape of columnar epithelial cells inlo pyramidal cones. As the surface area of apical end of neural epithelial cells becomes smaller relative to the basal surface, the rolling up of the
____ ________ ____ ________ _________ ___ ___ ________ _________ ___.
_________ __________ ________ ____ _________ _____ _____ __________ _____.
_________ ______ __________ ____ _________ ____ _______ _____ _______.
___ ____ _____ __________ ___ ________ _______ _______ _______ __________.
_________ ________ ____ ______ ___ ___ __________ _______ _______.
_______ _______ _________ _______ ______ ______ _________ _____.
_________ ______ _________ _________ ______ ____ ______ __________ _______.
_________ _____ ____ ____ ________ ______ _______.
_________ _________ __________ ________ __________ ______ _______.
___ ___ _____ _____ ____ __________ _______ ____ __________ _______ ____.
__________ ___ ___ ______ ____.
_____ ______ __________ ____ ____.
_______ ___ ________ ________ _____ ___ ______ _____ ___ _______ ______.
_______ _______ _____ _____ ________ _______ _________ ____ _______ ____.
_______ _______ ______ _________ ___ _____ _________ _______ ____ __________.
_______ _______ __________ _______ ____ ________.
___ _________ ____ _____ _____ ___.
______ _____ __________ ____ __________ ___ _______.
_____ _______ __________ _________ ____ _______ _________ ________ _________ ____.
_______ _______ _____ _________ ____ ______ _______.
______ _________ ____ _______ __________ ______ ____ ___ _____.
_______ _____ _______ _________ __________ _______ __________ __________ ______ __________ _________ ____.
______ _______ ________ ________ _________ _________ _________ ________ __________ _______.
__________ ___ _______ ______ ________ _________.
_______ _______ ___ __________ ___ ____ ______ __________ __________ _____ _________.
___ _____ _____ ____ ______.
_______ ____ _________ ________ ______ ___ __________ ______.
__________ ________ ________ ____ _______ ___ _________ ___.
______ _______ ___ ____ ___.
________ _______ _____ _________ _______ ________ ___ _________ __________ ________.
______ ________ ____ ________ _____ ________ ___.
___ ________ _____ ________ _________ _____ ________ ____ _________ ________ _______ ______.
____ ____ _____ _______ ___ ____ _____ ________ _____ _________ _______.
___ ________ _____ _________ ___ _______ ____.
____ _______ _________ ___ __________ ___ _______ ______ _____ _______ __________ ___.
__________ ___ ___ __________ __________ ____ ______ _________ ______.
________ ________ ________ _________ __________ ____ ____ ______.
____ ___ _____ ________ ___ _________ _______ _______ _______ _______ __________ _____.
_____ _______ _________ _____ ________ _____ __________ ________ ________ ______ ___.
_________ __________ ______ ______ _______ ______ ______ ______ _______ ____.
____ ____ _________ ______ __________.
_______ __________ ________ ______ ___ ________ ________.
__________ ___ _________ ________ _____ _______ __________ ______ _____ _________.
_____ ______ __________ ________ ______ __________ _____ __________ _______ _____ __________ _________.
________ ___ _____ __________ _________ _________ __________ ______.
______ _______ __________ ________ __________ ______ ________ __________ _______ ______ ________ ___.
_____ _____ _____ _____ _________ ____ __________.
______ _______ _____ ________ __________ ________ ______ _________ _______.
___ ____ _____ ___ __________ ________ _____ _______ ________ _______ _______.
_____ ____ _______ __________ ______ _________ _______.
______ __________ ________ _________ ________ ___ __________.
______ _________ _______ ___ ____ _______ ___ ______.
______ ______ _______ ________ ______ ________.
____ ________ _____ ___ _______.
__________ ________ __________ _______ ______ _____ ______ ________ _____ ____.
_______ _________ _____ ______ _____ _____ _____.
__________ __________ _______ ____ _________ _____ _______ ______ ______ __________ _____.
_____ _________.
- Solved Assignments
- Study Notes
- Guess Papers
- Question Papers
✓ Unlock up to 60% of the answer
✓ No payment required