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NWHSU Mash GA2Q4ESN

NWHSU Mash GA 2 Quiz 4 Embryology Skeletal and Nervous System

QuestionAnswer
T/F The primary center of ossification in the scapula forms both the body and most of the acromion T
T/F The clavicles articulate with the presternal cartilage which later joins the manubrium of the sternum. F -suprasternal cartilages
T/F In the foot, secondary centers of ossification appear only in the proximal epiphyses of the phalanges T
T/F Ribs have a single center of chondrification at nine weeks. F -seven weeks
T/F Secondary centers of ossification form in the epiphyses of long bones between 5 weeks of fetal development and the 20th year (depending on the specific bone). F -birth to 20 years
T/F The clavicle has the last primary center of ossification to appear in the body. F - secondary (ossifies first, closes last)
T/F The patella is completely cartilaginous at birth T
T/F Concerning the metacarpals and metatarsals of digits 2-5, secondary centers of ossification appear only in distal epiphyses. T
T/F The sternum develps by endochondral and intramembrous ossification. F -clavicle
T/F Ossification (primary) of a rib takes place from a single center located near the angle. TRUE
T/F Ossification (primary) of a rib takes place from a single loction at the head. F -near angle
T/F In general, the limbs reach the cartilagenous state at 10 weeks of embryonic development. F -6-7weeks
T/F Concerning the metacarpals and metatarsals of digits 2-5, secondary centers of ossification appear only in proximal epiphyses. False (distal epiphyses)
Describe in detail the anomaly known as "lobster claw". abnormal cleft between the 2nd and 4th metarcarpals and soft tissues, 3rd metacarpals and phalange are usually absent, thumb, and index finger can be fused.
Congenital malformation caused when mesenchyme between phalanges fails to breakdown. syndactyly
Specifically, what is the embryonic cause of a) cleft sternum b) supernumerary rib a) failure of sternal bands to fuse b)overdevelopment of costal process (in area other than thoracic) leading to an increased number of ribs (C7 or L1)
congenital malformation in which a small bone attaches hands or feet to the trunk. meromelia
anomaly with no limb development amelia
Besides ganglia and a small contribution to pia and arachnoid list 4 derivatives of the neural crest. odontoblasts, melanocytes, satelite cells, chomaffin cells of the adrenal medulla,
Besides ganglia, Schwann cells, and the cartilages of the brachial arches: list 4 derivatives of the neural crest. melanocytes, odontoblasts, satelite cells, chromaffin cells of adrenal medulla, small contribution to pia and arachnoid
the thalamus and hypothalamus develop from what embryonic components? Include secondary brain vesicle and plate. alar plates of diencephalon
Component that forms astrocytes and oligodendrocytes but NOT ependymal cells. gliablasts
Primordium for the cerebellum. rhombic lips formed by dorsal part of alar plates
Functional classification (use 3 letters) of the columns in the basal plate of the myelencephalon. GSE, SVE, GVE
Functional classification (use 3 letters) of the columns in the basal plate of the metencephalon. GSE, SVE, GVE
Functional classification (use 3 letters) of the columns in the basal plate of the mesencephalon. GSE, GVE
Brain vesicle which forms only the pons and cerebellum metencephalon
Briefly discuss how dorsal roots of spinal nerves develop. from the neural crest
What develops from the corpus striatum? future caudate and lenticular nuclei
The primordium of the cerebral cortex. pallium
the epithalamus develops from what embryonic components? Include secondary brain vesicle and plate. diencephalon, roof plate
The bilateral longitudinal groove in the developing spinal cord used to seperate basal and alar plates sulcus limitans
Briefly discuss the differentiation of the microglia. from mesenchyme
Myelination in the spinal cord begins about ______(1st, 2nd, 4th, or 8th) month of fetal development. Additionally, at birth the cord ends at the _____vertebral level. 4th, L3
Anomaly produced when any area of the neural tube fails to close; nervous tissue remains flattened and exposed to surface. rachischisis
Anomaly usually due to aqueductal stenosis hydrocephalus
Created by: AnatomyMash on 2013-03-23



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