Test 3
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3 planes of symmetry
• horizontal plane • coronal plane • sagittal plane
what is neural induction?
process by which ectoderm gives rise to skin and neural tissue
what is gastrulation?
process of blastula embryo transforms into 3 layers (gastrula)
when will gastrulation occur in frog zygote?
begin at a 256-cell stage in the frog
what organizer tissue induces all germ layers and accomplishes neural induction?
dorsal blastopore lip (DBL)
what is a neural tube?
a structure that forms during early embryonic development and eventually gives rise to the brain and spinal cord
4 steps of the formation of the neural tube
• bending/ invaginating the ventral midline • elevating the neural folds • pivoting the neural folds align them • fusing the neural folds across the dorsal
what are the 3 sections of the primary brain vesicles
• prosencephalon • mesencephalon • rhombencephalon
what is prosencephalon?
forebrain
what is a mesencephalon?
midbrain
what is rhombencephalon?
hindbrain
what are 2 types of neuronal migration?
• radial migration • tangential migration