NWHSU Mash GA 2 Quiz 1 Embryo Ear, Eyes, Branchial Arches, Misc
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| Component that specifically forms from the saccule | Choclear duct
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| component that SPECIFICALLY develops from the utricle | Semicircular canals
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| During the development of the inner ear, surface ectoderm thickens to form the _________. This item soon invaginates to form an ______ which subsequently loses contact with the surface to form the _____. | Otic placode, otic pit, otic vessicle
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| component that forms the external auditory meatus | 1st pharyngeal cleft
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| Component that specifically forms the tubotympanic recess which then forms the tympanic cavity and auditory tube | 1st pharyngeal pouch
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| Describe the formation of the tympanic membrane (mention germ layer(s) and embryonic structure(s) involved) | Ectoderm from floor of 1st pharyngeal cleft, endoderm from expanded 1st pharyngeal pouch, mesoderm intervenes between ectodermal (cleft) and endodermal (pouch) layers
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| Name 3 muscular components formed from the 1st branchial arch | mm. of mastication, mylohyoid, ant. belly of digastric, tensor tympani, tensor veli palatine
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| Name the nerve of the 2nd branchial arch. | Facial (CN VII)
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| Give the (3) derivatives from the cartilage of the 2nd branchial arch | Stapes, styloid process, stylohyoid ligament
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| Give the derivatives from the cartilage of the 2nd branchial arch. | Stapes Styloid process Lesser horn and superior half of hyoid
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| Name 2 muscular components that develop from the 2nd branchial arch. (for a muscle group, do NOT list individual mm. of the group- just list the group) | mm. of facial expression, post. belly of digastric, stapedius, stylohyoid
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| Give the derivatives from the cartilage of the 3rd branchial arch | Greater horn and inf. portion of hyoid bone
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| Nerve of the 3rd pharyngeal arch | CN 9 glossopharyngeal
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| Name the muscular components formed from the 4th branchial arch. | Cricothyroid Levator veli palantmi Constrictors of pharynx
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| Give the derivatives from cartilages of the 4th and 6th branchial arches. | Cartilages of larynx
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| Give the derivatives from the cartilage of the 6th branchial arch | Cartilages of the larynx
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| What is the fate of the preotic myotomes? | Form eye muscles
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| Give 3 derivatives from the hypomere of the cervical myotomes. | Scalenes Infrahyoid Geniohyoid
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| Give the specific hypomere derivative(s) of thoracic myotomes | Intercostal mm., subcostal m., abdominal obliques
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| Give the specific epimere derivative(s) of thoracic myotomes. | Deep intrinsic back muscles thoracic area
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| List the hypaxial (aka hypomere) derivative(s) of the lumber myotomes | Quadratus lumborum
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| Make a short flow diagram showing the differentiation of a somite. | Somites differentiate into Sclerotomes and Dermatomes, Myotomes develop partly from Dermatomes
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| The hypomere is innervated by ___________ of spinal nerves and forms _________ ( flexor, extensor ) muscles of the vertebral column. | Primary ventral rami Flexor
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| Give hypomere derivatives of the sacrococcygeal myotomes | Skeletal mm. of anus and sex organs, muscles of pelvic diaphragm
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| Name vessels which develop and remain in the adult to supply the pigment layer of the retina. | Short post.ciliary a.
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| As the eye develops, the short posterior ciliary arteries RUN (i.e., are located in) in the ______ and SUPPLY the ____________ | Choroid layer, pigment layer of retina
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| Concerning the post. 4/5ths of the INNER layer of the optic cup: a) give its specific name b) what vessel in the ADULT remains to supply it? | a) neural retina b) central artery of retina
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| What SPECIFIC part of the eye forms from the following? a) outer layer of the optic cup ( posterior 4/5ths )- b) inner layer of the optic cup ( anterior 1/5th )- | a) Pigment layer of retina b) Inner layer of ciliary bodies and iris
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| During the development of the eye, the optic cup is attached to the diencephalon by the narrow ____________ which later contains the fibers of the optic nerve. In addition, a space termed the ______ separates the inner and outer layers of the optic cup. | Optic stalk Intraretinal cleft
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| List the origin (neuroectoderm, surface ectoderm, mesenchyme, or endoderm) of the following components associated with the eye: a) conjunctival epithelium b) lacrimal gland epithelium c) iridopupillary membrane | a) surface ectoderm b) surface ectoderm c) surface ectoderm
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| List the origin (neuroectoderm, surface ectoderm, mesenchyme, or endoderm) of the following components associated with the eye: d) sphincter and dilator pupillae e) sclera f) lens | d) neuroectoderm e) mesenchyme f) surface ectoderm
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| List the origin (neuroectoderm, surface ectoderm, mesoderm/mesenchyme, or endoderm) of the following eye components: a) lens- b) neural retina- | a) surface ectoderm b) neuroectoderm
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| Name the germ layer (neuroectoderm, surface ectoderm, mesenchyme, or endoderm) responsible for: a) corneal epithelium b) choroid layer | a) surface ectoderm b) mesenchyme
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| Name the germ layer responsible for: a) uveal layer of iris- b) choroid layer- | a) Mesoderm b) Mesoderm
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| The uveal iris forms what part of the iris (outermost part, inner layer, pigment layer, entire iris)? | Outermost part
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| What causes coloboma? ( BE SPECIFIC ) | Failure of choroid fissure to fuse/close
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| What SPECIFIC components develop from the neural layer of the retina? | Primary rods and cones, secondary bipolar cells, tertiary ganglion cells
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| Draw a small diagram showing the most usual appearance of coloboma in the ADULT eye. | Unfinished development Of the choroid fissure , draw partial circle without bottom connecting
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| Name the adductor muscles of the eye. | superior rectus m., inferior rectus m., medial rectus m.
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| The TWO most effective methods of birth control are: | Anatomy lectures, small children (was on MASH, may be a joke but I included it - hee hee)
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| Hypaxial (aka Hypomere) muscles are (pre or postaxial) in position to what axis | preaxial, spinal
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| Six elevations termed ... appear on each side of the 1st pharyngeal cleft. Specifically, the elevations evetually form the | hillocks, auricle
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| Name the muscular derivatives of the occipital myotomes | Tongue muscles
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| What are the derivatives of the hyaloid artery | Central artery of the retina, hyaloid canal of the vitreous body
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| During development, name given to the thin layer of mesenchyme located immediately anterior to the pupil; it layer disappears. | Iridopupillary membrane
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