Aşağıdaki hücrelerden hangisi kapanmakta olan nöral tüpün kenarlarından ayrılarak vücuda dağılan hücrelerden köken alır?
A) Oligodendrosit
B) Pituisit
C) Pinealosit
D) Protoplazmik astrosit
E) Schwann hücresi
Cevap E
Nöral kristadan köken alan yapılar şunlardır;
Baş ve yüzün kemik, dermis ve bağ dokusu,
Kafa çiftleri (5, 7, 9, 10) ganglionları
Tiroid bezinin C hücresi
Kalbin konotrunkal bölmesi
Odontoblastlar
Arka kök (spinal) ganglionu
Sempatik zincir ve preaortik ganglion
GIS’nin parasempatik ganglionları
Adrenal bezin medula
Schwann hücreleri
Leptomeninksler
Melanositler
Neural crest derivatives
1-Ectomesenchyme (also known as mesectoderm): odontoblasts, dental papillae, the chondrocranium (nasal capsule, Meckel’s cartilage, scleral ossicles, quadrate, articular, hyoid and columella), tracheal and laryngeal cartilage, the dermatocranium (membranous bones), dorsal fins and the turtle plastron (lower vertebrates), pericytes and smooth muscle of branchial arteries and veins, tendons of ocular and masticatory muscles, connective tissue of head and neck glands (pituitary, salivary, lachrymal, thymus, thyroid) dermis and adipose tissue of calvaria, ventral neck and face
2-Endocrine cells: chromaffin cells of the adrenal medulla, glomus cells type I/II.
3-Peripheral nervous system: Sensory neurons and glia of the dorsal root ganglia, cephalic ganglia (VII and in part, V, IX, and X), Rohon-Beard cells, some Merkel cells in the whisker, Satellite glial cells of all autonomic and sensory ganglia, Schwann cells of all peripheral nerves.
4-Enteric cells: Enterochromaffin cells.
5-Melanocytes, iris muscle and pigment cells, and even associated with some tumors (such as melanotic neuroectodermal tumor of infancy).