Goldstein Discussion Vocab Terms

Goldstein Discussion Vocab Terms - Zone of Polarizing...

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Vocab Terms Sonic Hedgehog (SHH): morphogen – plays a key role in regulating the growth of digits on limbs and organization of the brain – controls cell division of adult stem cells Fibroblast Growth Factor (FGF): involved in proliferation and differentiation of wide variety of cells and tissues – present in basement membranes Somites : masses of mesoderm distributed along the two sides of the neural tube and that will eventually become dermis, skeletal muscle, and vertebrae – highly involved with rib formation Cloaca : the opening at the end of the intestinal tract that excretes urine and feces Axial skeleton : the portion of the skeleton that contains the skull, ribcage, and vertebral column
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Unformatted text preview: Zone of Polarizing Activity : area of mesenchyme that contains signals which instruct the developing limb bud to form along the anterior/posterior axis AER and ZPA are dependent on each other Hypopheses : feature of the cervical region Apical ectodermal ridge (AER): thickened layer of ectodermal cells at the distal tip of a developing limb bud works with the zone of polarizing activity crucial organizing region during limd development all other vertebrae except amphibians use this ridge Contralateral : on the other side Mesenchyme : mesodermal tissue that develops into connective and skeletal tissues...
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