Epiblast hypoblast - Guides d'étude, Notes de cours & Résumés

The pattern of neural structures in Xenopus that develop along the A-P axis is governed by signals of the ___ [D/V] mesoderm - correct answer The pattern of neural structures that develop along the A-P axis is governed by signals of the *dorsal* mesoderm What happens if you take one neurula portion of the Xenopus mesoderm and graft it to another portion of gastrula? - correct answer Anterior mesoderm g...

Medical Embryology Exam Questions With Verified Solutions Cleavage - answerthe process where a zygote divides into multiple cells blastomere - answerthe cells that the zygote divides into via cleavage morula - answerthis is what the zygote becomes after about 4 days, 16 + cells blastocyst - answerwhat the morula becomes when the blastomeres rearrange into masses when does implantation take place? - answer~day 6. fully implated at ~day 10 embryoblast - answerthe inner cell mass of the blas...

What good substances cross the placental membrane? - Answer O2, CO2, H2O, bilirubin, maternal serum proteins, RBc, IgG, IgA What harmful substances cross the placental membrane? - Answer 1) viruses: rubella, HIV, measles, oral conraception, WARFARIN, DILANTIN, Xanax, cocaine, heroin, RH-antibodies What does not cross the placental membrane? - Answer maternal chplesterol, Insulin, Succinylcholine, HEPARIN, bacteria Which vessel supplies blood to the fetus? - Answer umbilical vein Whic...

differentiation leads to the formation and organization of all the diverse cell types in the body. reproduction ensures that new individuals are produced from generation to generation. embryology the study of the developmental events that occur prior to birth prenatal period the first 38 weeks of human development that begin with the fertilization of the secondary oocyte and end with birth. pre-embryonic period the first 2 weeks of development when the single c...

Medical Embryology Exam Questions With Verified Solutions Cleavage - answerthe process where a zygote divides into multiple cells blastomere - answerthe cells that the zygote divides into via cleavage morula - answerthis is what the zygote becomes after about 4 days, 16 + cells blastocyst - answerwhat the morula becomes when the blastomeres rearrange into masses when does implantation take place? - answer~day 6. fully implated at ~day 10 embryoblast - answerthe inner cell mass of the blas...

A 43-year-old pregnant woman at 16 weeks of gestation comes to her OB/GYN for a normal examination. During routine blood tests, her serum a-fetoprotein (AFP) concentration is markedly decreased for her gestational age. Which abnormality or condition will the physician need to rule out based upon these low AFP levels? (A) Down syndrome (B) Spina bifi da (C) Anencephaly (D) Multifetal pregnancy (E) Hepatocellular carcinoma (A) Down syndrome A 32-year-old pregnant woman at 30 weeks of...

The best description for the spatial relationship between the wrist and the elbow is - ANSWER-the wrist is distal to the elbow Which of the following best described standard anatomical position? - ANSWER-lower limbs together with feet directed anteriorly Which of the following best describes a regional anatomy approach? - ANSWER-structural relationships of parts of the body The ____ passes through the body at right angles to the median and frontal planes, dividing the body into superior...

comparative morphology looking at anatomical characters (for example eyes, lungs, bones, etc) and seeing what is shared and what differs in what ways can anatomical characters differ? 1) function 2) form 3) genetic aspects (evolutionary history) homologous structures structures that share a common ancestry (ex: forelimbs in tetrapods) analogous structures structures that share a similar (and precise) function (ex: bat wings + bird wings, woodpecker tongue + aye aye f...

First Aid USMLE Step 1- Reproductive Organ Systems + Embryology 2023 Update Sonic Hedgehog Gene - ANS-Produced @ base of limbs in zone of polarizing activity Involved in patterning along anterior/posterior axis *SUMMARY: Anterior/posterior pattern* Wnt-7 Gene - ANS-Produced @ apical ectodermal ridge (thickened ectoderm @ distal end of each developing limb) Necessary for organization along dorsal/ventral axis *SUMMARY: Dorsal/ventral pattern* FGF Gene - ANS-Produced @ apical ectoderma...

what is embryology? the study of prenatal development Embryo is what time period of development? 2nd to 8th week development Fetus is what time period of development? 9th week to birth what is development? maturation, becoming older what is growth? increase in weight or special dimension (increase in cell numbers, cell size or cell productions) facial development beings when? 4th week what is congenital malformation? birth defects congeni...