5092222
Question 1
Question
The cranial neural crest cells come from the diencephalon, midbrain, and hindbrain. They will collectively enter the pharyngeal arches to become connective tissue and bone.
Answer
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Both true
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First true, second false
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First false, second true
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Both false
Question 2
Question
Which of the following is incorrect?
Answer
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The 1st pharyngeal arch is made from midbrain plus the 1st and 2nd rhombomeres
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The 2nd pharyngeal arch is made from the 4th rhombomere
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The 3rd pharyngeal arch is made from the 5th, 6th, and 7th rhombomeres
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The third rhombomere is not present in an arch because it produces so few CNCCs that they join with other rhombomeres.
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There are 8 rhombomere segments made from the hindbrain.
Question 3
Question
Mesoderm at the center of each pharyngeal arch tends to become skeletal muscles of the head and neck. The paraxial mesoderm at the junction of the pharyngeal arches and heart becomes cardiac muscle.
Answer
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Both true
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First true, second false
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First false, second true
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Both false
Question 4
Question
Which of the following is incorrect?
Answer
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The pharyngeal arch artery is derived from the splanchnic mesoderm
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The pharyngeal arch artery attaches the aortic sac to the ventral aorta
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The pharyngeal arch artery is embedded in the mesenchyme of the pharyngeal arches
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The pharyngeal arch artery branches from the aortic sac
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s'all good homeslice
Question 5
Question
Angioblasts are the precursors of blood vessels and they are dispersed throughout the mesenchyme. The pharyngeal arches come only from splanchnic mesoderm.
Answer
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Both true
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First true, second false
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First false, second true
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Both false
Question 6
Question
The cell bodies of motor neurons are outside of the pharyngeal arches at the rhombencephalon. The sensory cranial ganglia neurons include placodes, neural crest, and glia
Answer
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Both true
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First true, second false
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First false, second true
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Both false
Question 7
Question
SHH is from the ectoderm. FGF and BMP are produced in the endoderm.
Answer
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Both true
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First true, second false
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First false, second true
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Both false
Question 8
Question
Which of the following is correct?
Answer
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The cricothyroid, constrictors of pharynx, and intrinsic muscles of larynx are derived from the 4-6th pharyngeal arches
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The stapes, greater horn, and upper portion of the hyoid bone are derived from the 2nd pharyngeal arch
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The lower portion and lesser horn of the hyoid bone are derived from the 3rd pharyngeal arch
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The muscles of mastication, lacrimal bone, and posterior belly of digastric are derived from the first pharyngeal arch
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none of the above
Question 9
Question
All bones derived from the first pharyngeal arch undergo intramembranous ossification. The stapes, styloid processes, and hyoid all undergo endochondrial ossification.
Answer
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Both true
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First true, second false
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First false, second true
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Both false
Question 10
Question
The stapes, part of the hyoid bone, stylohyoid ligament, styloid process, and lesser horn of hyoid bone all come from Reichert's cartilage. The cricoid, arytenoid, and thyroid cartilages each from from the 4th and 6th pharyngeal arches.
Answer
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Both true
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First true, second false
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First false, second true
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Both false
Question 11
Question
Which of the following is incorrect?
Answer
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The maxillary artery is derived from the first pharyngeal arch artery
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The hyoid and stapedial arteries are derived from the second pharyngeal arch artery
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The common and internal carotid arteries are derived from the third pharyngeal arch artery
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The arch of the aorta comes from the left side of the 4th pharyngeal arch artery
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The ligamentum arteriosum comes from the right side of the 6th pharyngeal arch artery
Question 12
Question
The inferior parathyroid comes from the 4th pharyngeal pouch and the superior parathyroid comes from the 3rd pharyngeal pouch. The thyroid itself comes from the midline at the 2nd pharyngeal arch.
Answer
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Both true
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First true, second false
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First false, second true
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Both false
Question 13
Question
The muscles of the tongue are not derived from the pharyngeal arches but the tongue itself is derived from parts of the 1st-4th pharyngeal arches. The first pharyngeal arch yields 2 lateral lingual swellings and the epiglottal swelling comes from the 2nd, 3rd, and 4th arch.
Answer
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Both true
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First true, second false
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First false, second true
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Both false
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