Vidal Lecture Scripts- Week 4 - Birth-Body Cavities - Diaphragm - Respiratory System and Limb Formation

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Questions and Answers

At what week does the embryonic period end?

  • Week 8 (correct)
  • Week 6
  • Week 9
  • Week 10

During which week does the fetus begin contributing urine to the amniotic cavity?

  • Week 5
  • Week 11
  • Week 9 (correct)
  • Week 7

When do fingers start separating in the upper limb buds?

  • Week 5
  • Week 7 (correct)
  • Week 8
  • Week 6

What is a notable feature of embryonic development in terms of upper and lower body parts?

<p>Upper body develops before lower body (B)</p> Signup and view all the answers

What marks the beginning of the fetal period in human development?

<p>End of week 9 (C)</p> Signup and view all the answers

What is the purpose of brown fat in developing humans?

<p>To regulate body temperature (C)</p> Signup and view all the answers

At what approximate week can it be possible to determine the sex of the fetus on ultrasound?

<p>12-14 weeks (C)</p> Signup and view all the answers

What is the main function of the diaphragm in the human body?

<p>Separating the thoracic and abdominal cavities (D)</p> Signup and view all the answers

What is the importance of surfactant in fetal lung development?

<p>Prevents respiratory distress syndrome (D)</p> Signup and view all the answers

Which structure do somites develop next to during the formation of the neural tube?

<p>Notochord (B)</p> Signup and view all the answers

When does the brown adipose tissue in developing humans transition into white fat?

<p>28-30 weeks (C)</p> Signup and view all the answers

What landmarks are used to approximate the age of an embryo?

<p>Development of somites (C)</p> Signup and view all the answers

During which developmental stage does bone marrow in humans take over blood production?

<p>28th week (C)</p> Signup and view all the answers

At what stage do we observe the appearance of more advanced structures in the pharyngeal arches and cranial development?

<p>27 somite stage (B)</p> Signup and view all the answers

What does the expansion of the future cranium indicate in embryonic development?

<p>Creation of the forebrain (A)</p> Signup and view all the answers

Which structure arises from the somites according to the text?

<p>Musculature for the body (D)</p> Signup and view all the answers

In what direction does the embryo fold to create the tube along its center?

<p>Down (C)</p> Signup and view all the answers

What is the function of the notochord in the development of the embryo?

<p>Tells ectoderm to turn into neural tube (C)</p> Signup and view all the answers

Which part of the somite is responsible for creating the outer muscular layers of the gut?

<p>Splanknic mesoderm (B)</p> Signup and view all the answers

What is happening when cavitation or formation of interembryonic synomic spaces occurs?

<p>Future body cavity formation (C)</p> Signup and view all the answers

What is the significance of the lateral mesoderm in embryonic development?

<p>It plays a key role in creating body cavities through apoptosis and cell death (B)</p> Signup and view all the answers

During which week does the chance of survival for a premature delivery exceed 90%?

<p>32 weeks (A)</p> Signup and view all the answers

Which type of mesoderm is responsible for wrapping around the future digestive tube to create smooth musculature?

<p>Splanchnic mesoderm (B)</p> Signup and view all the answers

What is the main function of somites in embryonic development?

<p>Create bony structures mainly the vertebrae (A)</p> Signup and view all the answers

What drives the folding motion of the embryo, particularly from front to back?

<p>Growth along the neural tube (C)</p> Signup and view all the answers

What is the space for the future heart known as?

<p>Pericardial (B)</p> Signup and view all the answers

Which region of the embryo starts pushing the cranial end and the tail down?

<p>Neural tube (A)</p> Signup and view all the answers

What will the septum transversum eventually become?

<p>Diaphragm (B)</p> Signup and view all the answers

Where does the future heart begin its development according to the text?

<p>Above the head (B)</p> Signup and view all the answers

What happens when both the head, tail, and the sides come inward in the embryo?

<p>They create a cavity housing the heart (D)</p> Signup and view all the answers

What structure, along with the pleuroperitoneal folds and dorsal mesentery holding the esophagus and aorta, primarily makes up the diaphragm?

<p>Myoblasts from the body wall (B)</p> Signup and view all the answers

What structure, if it fails during development, can lead to a congenital diaphragmatic hernia?

<p>Pleural peritoneal membranes (B)</p> Signup and view all the answers

Which statement best describes the role of the plural peritoneal membranes in diaphragm formation?

<p>They grow as the lungs expand and ultimately fuse with the septum transversum. (B)</p> Signup and view all the answers

What happens during a congenital diaphragmatic hernia that leads to pulmonary hypoplasia?

<p>Intestines block lung growth in the chest. (A)</p> Signup and view all the answers

Which feature of embryonic development could contribute to a congenital diaphragmatic hernia?

<p>Formation of body wall muscles (B)</p> Signup and view all the answers

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