Posted by esb on October 08, 2011 at 18:12:24:
In Reply to: Questions for the Pharyngeal Arches posted by lae2 on October 06, 2011 at 11:58:34:
: Questions for the Pharyngeal Arches
: These questions were not submitted by the lecturer.
: True/False - October 06, 2011
: 1. The second pharyngeal arch gives rise to the muscles of mastication.
F - 2nd gives rise to muscles of facial expression, 1st does muscles of mastication
: 2. The trigeminal nerve grows into the first pharyngeal arch.
T
: 3. The superior laryngeal and recurrent laryngeal nerves grow into the 4th and 6th pharyngeal arches respectively.
T
: 4. The split innervation of the digastric muscle reflects contributions from the first and second pharyngeal arches.
T
: 5. The tympanic membrane is at the fusion of ectodermal and endodermal layers.
T
: 6. The transition from arch one to arch two occurs within the region of the middle ear.
T
: 7. The muscles of facial expression are derived from the second pharyngeal arch.
T
: 8. The stylopharyngeus muscle is the sole muscle derived from the third pharyngeal arch.
T
: 9. The fourth and sixth pharyngeal gives rise to the cartilages of the larynx.
T
: 10. The superior, middle, and inferior pharyngeal constrictor muscles are derived from the 4th and 6th pharyngeal arches and innervated by the vagus nerve.
F - only 4th? and innervated by superior laryngeal branch of vagus