1) D
2) E 3) B 4) C 5) A 6) E 7) D 8) C 9) C 10) D 11) D 12) E 13) C 14) B 15) C 16) F 17) T 18) F 19) F 20) F 21) F 22) T 23) T 24) F 25) F 26) D 27) B 28) A 29) E 30) C 31) B 32) C 33) A 34) B 35) A 36) D 37) C |
Essay Answers:
1) 1- The sclerotomes of somites (paraxial mesoderm). 2- The somatic layer of lateral plate mesoderm. 2) The axial skeleton consists of the bone of the head (cranium or skull), neck (hyoid bone and cervical vertebrae), and trunk (ribs, sternum, vertebrae, and sacrum). The appendicular skeleton consists of the bones of the upper and lower limbs, including those forming the pectoral (shoulder) and pelvic girdles. 3) Ossification is a process in which the mesenchymal cells and cartilages convert to bone during development. Its type are: membranous ossification and endochondral ossification. 4) 1- Neurocranium: membranous neurocranium and cartilaginous neurocranium. 2- Viscerocranium: membranous viscerocranium and cartilaginous viscerocranium. 5) The suture is a narrow region in the skull in which two bones meet while the fontanel is a region in the skull in which more than two bones meet. 6) Spina bifida is failure of the vertebral arches to fuse in the lumbosacral region. Spina bifida occulta: a type of spina bifida that involve the boney vertebral arch. Spina bifida cystica: a type of spina bifida that the neural tube fails to close. |