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IBS Set 6 Quiz - Embryology - Semester 2 Recap.

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Question 1

Question
What is the following structure called?
Image:
e1b43378-03e1-466b-8a12-cfc05e7dcb1c (image/png)
Answer
  • Blastocyst
  • Morula
  • Zygote

Question 2

Question
The primitive streak is indicative of gastrulation occuring.
Answer
  • True
  • False

Question 3

Question
The ectoderm gives rise to...
Answer
  • Enamel
  • Epidermis
  • Nervous system
  • Cardiovascular system
  • Respiratory system
  • Gastrointestinal system

Question 4

Question
The mesoderm gives rise to...
Answer
  • Cardiovascular system
  • Muscle
  • Connective tissue
  • Epidermis
  • Urinary system
  • Gastrointestinal tract

Question 5

Question
The endoderm gives rise to...
Answer
  • Respiratory system
  • Gastrointestinal tract
  • Urinary system
  • Cardiovascular system
  • Epidermis
  • Nervous system

Question 6

Question
The notochord forms from the notochordal plate in a cranial to caudal sequence.
Answer
  • True
  • False

Question 7

Question
What substances does the primitive node release?
Answer
  • Brain derived neurotrophic factor
  • NODAL
  • BMP4
  • Noggin
  • CSPG's

Question 8

Question
The function of NODAL is...
Answer
  • Maintains the primitive streak
  • Stimulates skin formation from the ectoderm
  • Stimulates cranial structure and nervous system development

Question 9

Question
The function of BMP4 is...
Answer
  • Maintains the primitive streak
  • Stimulates skin formation from the ectoderm
  • Stimulates cranial structure and nervous system development

Question 10

Question
The function of Noggin is...
Answer
  • Maintains the primitive streak
  • Stimulates skin formation from the ectoderm
  • Stimulates cranial structure and nervous system development

Question 11

Question
Neurulation is folding of the neural plate which continues until formation of a neural tube. The closure disconnects the neural crest from the ectoderm, also forming neural crest cells.
Answer
  • True
  • False

Question 12

Question
The notochord releases BMP that patterns the ventral side of the neural tube which gives the precursor to the motor neurones of the ventral spinal cord
Answer
  • True
  • False

Question 13

Question
Neural crest cells are formed when the neural tube closes and detaches from the ectoderm. Give some examples of where they may migrate and what structures develop.
Answer
  • Ectoderm - melanocytes
  • Mesoderm - ganglia, bones of the face and skull
  • Endoderm - urinary system

Question 14

Question
Spina Bifida is caused by failure of the neural tube to close.
Answer
  • True
  • False

Question 15

Question
NODAL helps to establish internal asymmetry.
Answer
  • True
  • False

Question 16

Question
Mutations in SHH leads to lack of bilateral symmetry and development of conditions like cyclopsia.
Answer
  • True
  • False

Question 17

Question
Hox genes control body segmentation; essentially determining what section of the body will become what particular limb etc.
Answer
  • True
  • False

Question 18

Question
The visceral layer of the lateral plate mesoderm gives rise to what structure?
Answer
  • GI tract
  • Muscle
  • Heart
  • Lungs

Question 19

Question
The parietal layer of the lateral plate mesoderm gives rise to what structures?
Answer
  • Bones of limbs
  • Connective tissue of limbs
  • Urogenital system
  • Heart

Question 20

Question
The intermediate mesoderm gives rise to what structure?
Answer
  • Urogenital system
  • Respiratory system
  • Connective tissue of limbs
  • GI tract

Question 21

Question
The paraxial mesoderm differentiates into dermatome, myotome and sclerotome. What will the dermatome become?
Answer
  • Dermis
  • Muscle
  • Tendon
  • Cartilage
  • Bone

Question 22

Question
The paraxial mesoderm differentiates into dermatome, myotome and sclerotome. What will the myotome become?
Answer
  • Dermis
  • Muscle
  • Tendon
  • Cartilage
  • Bone

Question 23

Question
The paraxial mesoderm differentiates into dermatome, myotome and sclerotome. What will the sclerotome become?
Answer
  • Dermis
  • Muscle
  • Tendon
  • Cartilage
  • Bone

Question 24

Question
What structures may the pharyngeal pouches give rise to?
Answer
  • Palatine tonsils
  • Parathyroid gland
  • Thymus gland
  • Thyroid gland
  • Cricoid cartilage

Question 25

Question
Neural crest cells migrate to the pharyngeal arches. Failure of migration can lead to conditions such as spina bifida.
Answer
  • True
  • False

Question 26

Question
What muscular and skeletal structures arise from the 1st pharyngeal arch?
Answer
  • Mandible
  • Muscles of mastication
  • Muscles of facial expression
  • Styloid process

Question 27

Question
What muscular and skeletal structures arise from the 2nd pharyngeal arch?
Answer
  • Mandible
  • Styloid process
  • Muscles of mastication
  • Muscles of facial expression

Question 28

Question
What muscular and skeletal structures arise from the 3rd pharyngeal arch?
Answer
  • Stylopharyngeus
  • Hyoid
  • Styloid process
  • Thyroid cartilage

Question 29

Question
What muscular and skeletal structures arise from the 4th pharyngeal arch?
Answer
  • Mandible
  • Pharyngeal constrictors
  • Thyroid cartilage
  • Muscles of facial expression

Question 30

Question
What muscular and skeletal structures arise from the 6th pharyngeal arch?
Answer
  • Cricoid cartilage
  • Intrinsic muscles of the larynx
  • Pharyngeal constrictors
  • Thyroid cartilage

Question 31

Question
The medial nasal prominences fuse to form the secondary palate.
Answer
  • True
  • False

Question 32

Question
The maxillary prominences fuse to form the secondary palate.
Answer
  • True
  • False
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