NWCC GA2 MASH #1 EMBRYO
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| Give the (3) derivatives from the cartilage of the 2nd branchial arch | show 🗑
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| show | Skeletal mm. of anus and sex organs, muscles of pelvic diaphragm
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| What is the fate of the preotic myotomes? | show 🗑
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| show | CN 9 glossopharyngeal
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| As the eye develops, the short posterior ciliary arteries RUN (i.e., are located in) in the ______ and SUPPLY the ____________ | show 🗑
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| Name the germ layer (neuroectoderm, surface ectoderm, mesenchyme, or endoderm) responsible for: a) corneal epithelium b) choroid layer | show 🗑
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| show | 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 | show 🗑
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| show | a) pigment layer of retina b) inner layer of ciliary body, inner layer of iris
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| show | Primary rods and cones, secondary bipolar cells, tertiary ganglion cells
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| show | Short post.ciliary a.
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| show | 3rd
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| Name given to the distal 1/3rd of the bulbus cordis | show 🗑
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| Name the adult derivatives of the middle 1/3rd of the bulbus cordis | show 🗑
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| show | Myocardial mantle
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| show | Septum primum
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| Forms the auricles | show 🗑
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| show | The superior and inferior endocardial cushions grow and fuse across forming the atrioventricular septum which separates the primary atrioventricular canal in the right and left atrioventricular canals
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| show | Oblique vein of left atrium
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| Forms the trabeculated part of the left ventricle ONLY | show 🗑
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| Foramen ovale forms within this embryonic structure | show 🗑
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| show | mm. of facial expression, post. belly of digastric, stapedius, stylohyoid
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| Give the derivatives from the cartilage of the 6th branchial arch | show 🗑
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| Give the derivatives from the cartilage of the 3rd branchial arch | show 🗑
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| show | a) neural retina b) central artery of retina
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| Name the 3 embryonic arterial networks formed by the end of the 3rd week. | show 🗑
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| SPECIFICALLY is formed by the ORIGINAL embryonic COMMON atrium | show 🗑
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| Embryonic component responsible for forming the myocardium (do NOT list mesenchyme or mesoderm) | show 🗑
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| Name give to the middle 1/3rd of the bulbus cordis | show 🗑
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| Embryonic component forms NONtrabeculated part of right ventricle | show 🗑
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| show | Conus cordis
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| Defects contributing to the Tetralogy of Fallot (circle all that apply): a) pulmonary stenosis, b) atrial septal defect, c) ventricular septal defect, d) hypertrophy of left ventricle | show 🗑
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| Component that specifically forms the tubotympanic recess which then forms the tympanic cavity and auditory tube | show 🗑
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| show | Choclear duct
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| show | Splanchnic, cardiogenic
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| show | Right conal ridge, left conal ridge, posterior (inferior) endocardial cushion
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| What specific structure(s) is/are derived from the INFERIOR part of the right venous valve of the sinu-atrial orifice? | show 🗑
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| show | Vitelline
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| List the hypaxial derivative(s) of the lumber myotomes | show 🗑
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| Name 3 muscular components formed from the 1st branchial arch | show 🗑
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| show | 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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| show | Otic placode, otic pit, otic vessicle
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| Give the derivatives from the cartilage of the 2nd branchial arch. | show 🗑
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| show | Deep intrinsic back muscles thoracic area
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| The hypomere is innervated by ___________ of spinal nerves and forms _________ ( flexor, extensor ) muscles of the vertebral column. | show 🗑
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| Name the muscular components formed from the 4th branchial arch. | show 🗑
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| show | a) Mesoderm b) Mesoderm
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| show | Optic stalk Intraretinal cleft
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| show | Failure of choroid fissure to fuse/close
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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 )- | show 🗑
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| show | Dorsal aortae
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| ________________ the definitive derivative of the left common cardinal vein | show 🗑
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| ________________ opening that forms when the upper part of septum primum perforates | show 🗑
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| show | Primitive ventricle and proximal 1/3 of bulbis cordis grow outward, causing the medial walls to fuse forming the pars muscularis. To complete closure the pars membranosus forms from the L & R conal ridges and the posterior endocardium cushion’s swelling
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| ________________ name given to the middle 1/3 of the bulbus cordis | show 🗑
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| What specific structure(s) is/are derived from the INFERIOR part of the right venous valve of the sinuatrial orifice? | show 🗑
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| Due to the _____ degree rotation of the ____________ plate, the future pericardial cavity lies __________ ( dorsal, ventral ) to the developing heart. | show 🗑
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| show | Shifts opening of sinu venosus to right side of common atrium
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| Briefly discuss the directional movements of the bulbus cordis and primitive ventricle as the bulboventricular sulcus develops. | show 🗑
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| _______________ forms the principle cavity of right atrium | show 🗑
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| show | Semicircular canals
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| ____________ component that forms the external auditory meatus | show 🗑
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| Give the derivatives from cartilages of the 4th and 6th branchial arches. | show 🗑
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| Make a short flow diagram showing the differentiation of a somite. | show 🗑
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| Give 3 derivatives from the hypomere of the cervical myotomes. | show 🗑
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| show | Facial (CN VII)
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| The uveal iris forms what part of the iris (outermost part, inner layer, pigment layer, entire iris)? | show 🗑
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| show | Choroid layer Pigment layer of retina
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| Draw a small diagram showing the most usual appearance of coloboma in the ADULT eye. | show 🗑
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| show | a) surface ectoderm b) neuroectoderm
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| ____________ vessels which develop from blood islands of the yolk sac (be specific) | show 🗑
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| During early development, the primitive heart is suspended in the __________ cavity by a mesentery known as the dorsal ___________ | show 🗑
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| Give the derivatives of: a. the right horn of the sinus venosus b. the left horn of the sinus venosus | show 🗑
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| Give the day when the heart: a) begins to beat b) tubes fuse | show 🗑
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| Forms trabeculated part of right ventricle ONLY | show 🗑
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| show | Primitive single pulmonary v.
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| show | Anatomy lectures, small children (was on MASH, may be a joke but I included it - hee hee)
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| show | Intercostal mm., subcostal m., abdominal obliques
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| show | OLD EMBRYO FROM THE SPREADSHEET IS NOT INCLUDED AS IT WAS NOT COVERED IN OUR CLASS. ALSO T/F is NEXT as individual questions.
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| a. the diploid number of chromosomes is 23 b. union of male and female gametes starts at the embryonic period c. capacitation takes about 7 hours | show 🗑
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| d. the acrosome reaction is the removal of a protein coat from the sperm head e. the zona pellucida is the first barrier a sperm must penetrate | show 🗑
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| a.penetration of the oocyte cell membrane causes the oocyte to finish the 2nd meiotic division b.a morula forms at about 3 days postfertilization c.cleavage involves a series of cell divisions forming blastomeres | show 🗑
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| show | (false – morula) (true)
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| a. the syncytiotrophoblast gives rise to the cytotrophoblast (b. development of the trophoblast eventually forms most of the placenta and extraembryonic membranes c. the amnion is formed by an outer layer of amnioblasts | show 🗑
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| d. a hydatidiform mole is a malignant tumor formed from chorionic remnants e. the bilaminar embryonic disc forms during the first week of development | show 🗑
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| show | (false – mesoblast) (false)
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| show | (false – embryonic ectoderm, intraembryonic mesoderm, embryonic endoderm) (false – 3rd week) (true)
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| a. morphogenesis occurs mainly during the fetal period b. the adrenal cortex develops from lateral plate mesoderm c. fusion of the vitelline duct and connecting stalk form the umbilical cord | show 🗑
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| show | (true) (true)
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| a. the embryonic period begins at 3 weeks of development b. the diploid number of chromosomes is 23 c. the corona radiata is the 2nd barrier a sperm must penetrate | show 🗑
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| show | (false – capacitation) (false – 300-500)
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| show | false – embryoblast) (false – inner layer) (true)
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| d. uteroplacental circulation involves maternal sinusoids and the cytotrophoblast e. the trilaminar embryonic disc develops during the 2nd week | show 🗑
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| a. the blastocyst forms at about 4 to 4 ½ days of development b. the zona pellucida disappears when the blastocyst stage is reached c. female and male pronuclei replicate their DNA before forming zygote | show 🗑
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| d. the blastocyst forms an embryoblast and trophoblast e. the morula consists of about 24 to 26 cells | show 🗑
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| a. lateral and cephalocaudal folding occur during the 3rd week b. gut formation and amniotic cavity surrounding the embryo are due to BOTH lateral and cephalocaudal folding c. in general the embryo has a caudocephalic gradient of differentiation | show 🗑
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| show | (false – mesoblast) (false – primitive streak)
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| a. histogenesis occurs mostly during the fetal period b. the human gestational period is 40 weeks postfertilization c. morphogenesis occurs mostly during the embryonic period | show 🗑
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| d. the individual takes on a human appearance during the fetal period e. the spleen develops from lateral plate mesoderm | show 🗑
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| show | (false – 2n) (false – acrosome reaction) OR (involves removal of protein coat from sperm head) (false – corona radiata)
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| show | (false – 300-500) (true)
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| show | d. implants at 5 ½ - 6 days
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| show | (true) (true) (false – lateral plate)
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| show | (true) (true)
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| show | (false – mesoblast) (true) (false – develop from primitive streak remnants)
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| show | (“the thyroid develops from lateral plate mesoderm” in another question) (false) (false – fetal period)
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| show | (another q. – “lateral folding occurs…” ) (false – 4th week) (true) (true)
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| show | (true) (true)
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| show | (false – 4-4.5 days) (true) (true)
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| show | (true) (true)
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| a. the diploid number of chromosomes is n b. capacitation involves perforation of the sperm head c. the zona pellucida is the 1st barrier a sperm must penetrate | show 🗑
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| d. of the initial 200-300 million sperm only 3000-5000 reach the oocyte e. fertilization in the distal 1/3 of the uterine tube is best | show 🗑
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| show | (true) (false – acrosome reaction) OR (penetration by additional sperm to zona pellucida becomes impossible) (false – 300-500)
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| show | (false – 23 (not pairs)) (false – protein coat)
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| show | (true) (true) (false – 4-4.5 days)
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| female and male pronuclei replicate their DNA before forming a zygote e. the zona pellucida disappears during the blastocyst stage | show 🗑
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| show | (false – extraembryonic endoderm) (false – amnioblasts) (false – yolk sac)
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| show | (true) (false – malignant)
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| Which ONE of the following statements is TRUE concerning the trilaminar embryonic disc? a. it forms during the 4th week b. the 3 germ layers are epiblast, mesoblast, and hypoblast | show 🗑
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| show | (false) (true) (false – embryonic period)
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| a. the fetal period is weeks 9-38 postfertilization b. taking on a human appearance is a characteristic of the fetal period c. lateral and cephalocaudal folding of the body occur in the 4th week | show 🗑
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| d. the urogenital system develops from the lateral plate mesoderm e. the embryonic period is the most critical of development | show 🗑
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| show | (true) (false – 46) (false – 1-2 weeks)
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| d. the acrosome reaction is the removal of a protein coat e. the cell membrane is the 2nd barrier a sperm must pass | show 🗑
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| a. penetration of the oocyte cell membrane causes the oocyte to finish the 2nd meiotic division b. the morula forms at about 4 to 4 ½ days c. the blastocyst may be a hollow ball of about 58 cells | show 🗑
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| d. cleavage involves a series of mitotic divisions e. the zona pellucida disappears before implantation | show 🗑
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| a. the spleen develops from intermediate mesoderm b. the epithelium of the lungs develops from endoderm c. the primitive pit and node give rise to the notochord | show 🗑
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| show | (true) (true)
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| a. the hypoblast forms most embryonic mesoderm b. the yolk sac has an inner layer of embryonic endoderm c. a hydatiform mole is an invasive tumor which tunnels through the chorion components | show 🗑
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| d. the fetal period is 9-40 weeks postfertilization e. the yolk sac is also called the exocoelemic cavity | show 🗑
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| show | (true) (false - primitive streak) (true)
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| d. the gut develops from part of the yolk sac e. a characteristic of the fetal period is that the embryo takes on a human appearance | show 🗑
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