Quiz 1 of 0
Study of development of organs of respiratory, urinary, circulatory, nervous, reproductive systems
vaibhavpatel1028@gmail.com September 30, 2024
Multiple Choice Questions (MCQs)
- What embryonic layer gives rise to the respiratory system?
- A) Ectoderm
- B) Mesoderm
- C) Endoderm
- D) Trophoblast
Answer: C) Endoderm
- Which stage of respiratory development occurs between weeks 6 and 16?
- A) Alveolar Stage
- B) Canalicular Stage
- C) Saccular Stage
- D) Pseudoglandular Stage
Answer: D) Pseudoglandular Stage
- The metanephros becomes functional around which week of gestation?
- A) Week 4
- B) Week 7
- C) Week 10
- D) Week 12
Answer: C) Week 10
- Which structure forms the heart during embryonic development?
- A) Neural tube
- B) Respiratory diverticulum
- C) Tubular heart
- D) Mesonephric duct
Answer: C) Tubular heart
- The lymphatic system develops from which type of cells?
- A) Ectodermal cells
- B) Mesodermal lymphangioblasts
- C) Endodermal cells
- D) Neural crest cells
Answer: B) Mesodermal lymphangioblasts
- Neural crest cells contribute to the formation of which system?
- A) Musculoskeletal system
- B) Nervous system
- C) Circulatory system
- D) Respiratory system
Answer: B) Nervous system
- Which reproductive structure develops from mesonephric ducts?
- A) Ovaries
- B) Uterus
- C) Testes
- D) Fallopian tubes
Answer: C) Testes
- The thyroid gland develops from which embryonic layer?
- A) Ectoderm
- B) Mesoderm
- C) Endoderm
- D) Neural crest
Answer: C) Endoderm
- The eye develops from which embryonic tissues?
- A) Mesoderm and endoderm
- B) Ectoderm and neuroectoderm
- C) Endoderm only
- D) Ectoderm only
Answer: B) Ectoderm and neuroectoderm
- What is the primary function of the saccular stage in lung development?
- A) Formation of conducting airways
- B) Initial vascularization of lungs
- C) Development of terminal sacs (primitive alveoli)
- D) Gas exchange
Answer: C) Development of terminal sacs (primitive alveoli)
True/False Statements
- The digestive system originates from the mesoderm.
Answer: False (It originates from the endoderm.) - The tubular heart forms by the end of week 3 of gestation.
Answer: True - Lymph nodes develop from ectodermal tissue.
Answer: False (They develop from mesodermal tissue.) - Neural tube formation occurs around week 4 of embryonic development.
Answer: False (It occurs around week 3.) - The metanephros is the permanent kidney in mammals.
Answer: True - The eye develops primarily from mesodermal tissues.
Answer: False (It develops from ectoderm and neuroectoderm.) - The adrenal glands are derived entirely from mesodermal tissue.
Answer: False (They have both mesodermal and neural crest origins.) - The saccular stage is critical for gas exchange in the lungs.
Answer: False (Gas exchange occurs in the alveolar stage.) - Ovaries develop from paramesonephric ducts during embryogenesis.
Answer: True - The circulatory system starts developing after all other organ systems are formed.
Answer: False (It begins developing early, around week 3.)
Fill in the Blanks
- The respiratory system originates from the __________ during embryonic development.
Answer: endoderm - The __________ becomes functional around week 10 of gestation.
Answer: metanephros - The __________ forms from a tubular structure by week 3.
Answer: heart - The __________ system develops from mesodermal lymphangioblasts.
Answer: lymphatic - Neural crest cells contribute to the formation of the __________ system.
Answer: nervous - The male reproductive system develops from __________ ducts.
Answer: mesonephric - The thyroid gland forms from __________ tissue at the base of the tongue.
Answer: endodermal - The eye develops from both ectoderm and __________ tissues.
Answer: neuroectoderm - The saccular stage in lung development leads to the formation of __________ sacs.
Answer: terminal or primitive alveoli - The adrenal glands consist of both mesodermal cortex and neural crest-derived __________.
Answer: medulla