Question | Answer |
2 cell stage occurs in how many hours? | 36 |
4 cell stage occurs in how many hours? | 40 |
A 12 to 16 cell mass is the? | morula |
Type of cell that can become any cell in the body? | totipotent |
Type of cell that can become many types of cells but not all? | pluripotent stem cell |
Type of cell facilitating communication with endothelial blood vessel cells? | adult neural stem cells |
Thickened band of pluripotential cells in the bilaminar disc is knows as the ______ | primitive streak |
What week does the bilaminar embryonic disc form? | 2 |
What week does the primitive streak form? | 2 |
What week does the neural groove form? | 3 |
What week do the neural fold form? | 3 |
What week is the first menstrual period missed? | 3 |
What is the conspicuous knot of specialized ectodermal cells on the primitive streak? | primitive node |
What structure in the adult are notochordal remnants? | nucleus pulposus of the IV disc |
Persistant notochord may develop into what kind of tumors? | chordomas |
Neural groove appears in what week of development? | 3 |
What week do the neural folds begin to fuse? | 4 |
What is the term used for the future brain in the embryo? | encephalon |
What are the 3 major divisions of the embryonic brain? | prosencephalon, mesencephalon, rhombencephalon |
What week are the 3 distinct forms of the brain formed? | 3 |
What is neurulation? | fustion of the neural folds forming the neural tube |
What week does neurulation occur? | 4 |
What week is the neural canal formed? | 4 |
The neural canal becomes the future what? | ventricular system |
What 2 flexures change ventral to dorsal folding? | mesencephalic and cervical flexure |
What is the term given to autonomic and sensory impairment with thickening and expansion of the meninges? | neural crest syndrome |
What are the 5 identifiable division of the embryonic brain? | telecephalon, diencephalon, mesencephalon, metencephalon, myelencephalon |
What are the 3 poles of the brain? | frontal, occipital, temporal |
What are the 4 surfaces of the brain? | Sup, Inf, Lat, Med |
What are the 5 lobes of the brain? | Frontal, Occipital, Temporal, Parietal, Incilar |
What is included in the Diencephalon? | thalamus, hypothalamus, subthalamus, epithalamus |
Most congenital malformations occur in what weeks of development? | 3-5 |
What is the term for all forms of developmental malformations occurring in the median plane of the back? | spinal syraphism |
What is the most common CNS malformaion? | spina bifida |
What term is used for a bony spinal defect superficial to the normal spinal cord? | spina bifida occulta |
What term is used when a membrane surrounding the spinal cord herniates through a bony defect? | spina bifida cystica |
What defect involves only the meninges in the cyst? | meningocele |
What defect involves the spinal cord and roots in the meninges in the cyst? | myelomeningocele |
What is an increase of cerbrospinal fluid in the ventricular system? | hydrocephaly |
What is a conspicuous malformation of the brain that is incompatible with life? | anencephaly |
What is the spongy brain mass left in anencephaly? | area cerbrovasculosa |
Anencephaly would occur in what week of development? | 5 |