Somites - Study guides, Revision notes & Summaries

1. The part of the sperm containing proteolytic enzymes to digest the zona pellucida is the: A. capacitor B. head C. corona D. acrosome E. cumulus D. is correct. The acrosome is the part of the sperm containing proteolytic enzymes to digest the zona pellucida. It is exposed by the process of capacitation. Then, under the influence of substances released by corona radiata cells, it releases its proteolytic enzymes and penetrates the oocyte. 2. The ovulated mammalian oocyte is arre...

cmmb midtermRTK pathway and FGFs - correct answer Ligand, RTK, GEF, RAS, RAF, MEK,ERK, TF, Transcription morula, blastula, gastrula blastomere - correct answer morula: cleavage stage embryo, no cavityblastula: cleavage stage, when there is a cavity in the embryogastrula: embryo undergoing gastrulationneurula: embryo as neural tube is formingblastomere: any cell of a cleavage stage embryo cleavage - correct answer rapid cell divisions divide the zygote cytoplasm into many smaller cells w...

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 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...

Endoderm Lies on the inside and give rise to epithelium of respiratory tract, GI and GU tract Ectoderm 2 Types: Surface ectoderm: epidermis, anterior pituitary, lens of eye, enamel, hair, nails. Neuroectoderm: Neural tube - Posterior pituitary, retina, CNS, pineal gland Neural crest - DRG, ANS, parafollicular cells of thryoid, adrenal medulla Mesoderm Paraxial - gives rise to 31 somites Intermediate - Urogenital sys and kidneys Head - skull, muscles, CT of head, ...

ACTUAL NBCE PART 1- GENERAL ANATOMY EXAM 2024. 100% CORRECTLY ANSWERED QUESTIONS . TOP PRIORITY VERIFIED EXAM 2024. (200+ ANSWERED QUESTIONS) Which of these muscles is not part of the rotator cuff? a. Teres minor b. Supraspinatus c. Teres major d. Subscapularis - ANS: c. Teres major What is the nerve supply of the teres minor? - ANS: Axillary nerve What is the nerve supply to the teres major? - ANS: Subscapular nerve Weakness of what muscle will cause "winging" of th...

What embryologic germ layer is the gut and respiratory tract derived from? The endoderm What embryologic germ layer gives rise to tubular structures (stuff that is inside)? The endoderm Mesoderm gives rise to how many subgroups? 4 subgroups What are the 4 subgroups of mesoderm? 1. Paraxial mesoderm 2. Intermediate mesoderm 3. Head mesoderm 4. Lateral Plate mesoderm What embryologic germ layer gives rise to somites? Paraxial mesoderm What embryologic g...

Mesoderm, what are the derivatives? Paraxial Intermediate Head Lateral plate Paraxial - Somites (31) Intermediate - Urogenital system and kidneys Head - Skull, MM, CT of head, dentine Lateral plate - Adrenal cortex, blood & lymph, spleen spleen and adrenal cortex are from mesoderm lateral plate Kidneys are from mesoderm intermediate Anterior pituitary and lens of eye are from surface ectoderm enamel is from surface ectoderm Neuroectoderm consists of...

Chapter 03: Prenatal Development MULTIPLE CHOICE 1. The folding of the embryo during prenatal development causes _____ to be on the _____. a. endoderm; inside of the embryo b. ectoderm; inside of endoderm c. endoderm; outside of the mesoderm d. mesoderm; outside of the ectoderm ANS: A After folding of the disc, the endoderm lies inside the ectoderm, with mesoderm filling in the areas between these two layers. This movement of the embryonic cell layers forms one long, hollow ...

notochord correct answers the characteristic from which the phylum derives its name (means back-cord); a rodlike, semirigid body or fluid-engorged cells enclosed by a fibrous sheath extending the entire length of the body monophyletic correct answers groups that contain all known descendants of a single common ancestor paraphyletic correct answers groups (like reptiles) that do not contain the descendants of their most recent common ancestor Somites correct answers a series of cartilagi...