Embryonic Development Quiz

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What is the function of the pellucid zone in oogenesis?

Nutrition and protection

How many chromosomes are present in a haploid oocyte?

23 chromosomes

What is the main function of the acrosome in a spermatozoon?

Assist in fertilization

What is the approximate number of follicles present in a female foetus?

<p>7 million follicles</p> Signup and view all the answers

During the ovarian cycle, what happens if the oocyte is not fertilized?

<p>The non-fertilized oocyte degenerates</p> Signup and view all the answers

What is the main function of the corona radiata in oogenesis?

<p>Protection of the oocyte</p> Signup and view all the answers

What is the name of the structure that avoids polyspermy in oogenesis?

<p>Pellucid zone</p> Signup and view all the answers

What is the approximate number of follicles present at the beginning of puberty?

<p>40,000 follicles</p> Signup and view all the answers

During which phase of the ovarian cycle does the oocyte reach full maturity?

<p>Follicular phase</p> Signup and view all the answers

What is the name of the structure from which the oocyte is extruded during ovulation?

<p>Graafian follicle</p> Signup and view all the answers

During which period is the maturation of tissues and organs and the growth of the body characterized?

<p>Fetal period</p> Signup and view all the answers

At the end of which period are the main organ systems established and the major features of the external body recognizable?

<p>Embryonic period</p> Signup and view all the answers

In which edition of Langman's Medical Embryology would you find information about the external appearance by the 2nd month?

<p>13th Edition</p> Signup and view all the answers

Which book provides information about the rapid growth from the 9th week to birth?

<p>Langman's Medical Embryology, 13th Edition</p> Signup and view all the answers

Which book is authored by Drake RL, Vogl AW, and Mitchell AWM?

<p>Gray's Basic Anatomy, 4th Edition</p> Signup and view all the answers

Which edition of Langman's Medical Embryology is the most recent?

<p>14th Edition</p> Signup and view all the answers

In which book would you find information authored by Schoenwolf GC, Bleyl SB, Brauer PR, and Francis-West PH?

<p>Larsen's Human Embryology, 6th Edition</p> Signup and view all the answers

Which book is authored by Sadler TW and published in 2015?

<p>Langman's Medical Embryology, 13th Edition</p> Signup and view all the answers

Which book is authored by Maria del Mar Ubero Martinez and affiliated with UCAM Universidad Católica de Murcia?

<p>None of the above</p> Signup and view all the answers

Which book is not mentioned in the provided text as a reference source?

<p>Langman's Medical Embryology, 12th Edition</p> Signup and view all the answers

Which process establishes three germ layers from primitive streak?

<p>Gastrulation</p> Signup and view all the answers

During which phase does the human zygote pass through morula and blastocyst stages?

<p>Implantation</p> Signup and view all the answers

Which layer differentiates into epiblast and hypoblast during formation of the bilaminar germ disc?

<p>Cleavage</p> Signup and view all the answers

Which process involves the formation of the neural tube from the neural plate?

<p>Neurulation</p> Signup and view all the answers

Which layer's derivatives include gastrointestinal and respiratory tracts?

<p>Endoderm</p> Signup and view all the answers

What is the process by which male and female gametes fuse?

<p>Fertilization</p> Signup and view all the answers

What is the process that describes abnormal implantation events?

<p>Abnormal implantation</p> Signup and view all the answers

During which phase does the corpus luteum secrete hormones after the follicle ruptures?

<p>Luteal phase</p> Signup and view all the answers

Which layer's derivatives include the central and peripheral nervous systems?

<p>Ectoderm</p> Signup and view all the answers

What is the process by which the series of mitotic divisions occur from zygote to blastocyst?

<p>Cleavage</p> Signup and view all the answers

Study Notes

Human Embryonic Development

  • Luteal phase: Corpus luteum secretes hormones after follicle ruptures
  • Cleavage: Series of mitotic divisions from zygote to blastocyst
  • Implantation: Human zygote passes through morula and blastocyst stages and begins implantation in uterine mucosa
  • Bilaminar germ disc: Formation simultaneous to implantation; embryoblast differentiates into epiblast and hypoblast
  • Abnormal implantation: Describes abnormal implantation events
  • Gastrulation: Establishes three germ layers (endoderm, mesoderm, and ectoderm) from primitive streak
  • Neurulation: Formation of neural tube from neural plate and differentiation of neural crest cells
  • Ectoderm: Derivatives include gastrointestinal and respiratory tracts, urinary bladder, and more
  • Endoderm: Derivatives include central and peripheral nervous systems, skin, pituitary, mammary and sweat glands
  • Mesoderm: External features include somites and pharyngeal arches
  • Gametogenesis: Process by which male and female gametes fuse
  • Fertilization: Fusion of male and female gametes to form zygote

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