Pharynx/larynx

Question 1

What are the 5 layers of the pharynx?

Answer 1

1. Buccopharyngeal fasica
2. Muscular layer
3. pharyngobasilar (fibrous) layer
4. Submucosa
5. mucous membrane

Question 2

Branches of vagus in the neck to know

Answer 2

1. superior laryngeal- external and internal
2. recurrent laryngeal
3. pharyngeal
4. auricular

Question 3

innervation of pharynx by

Answer 3

IX, X, XI via pharyngeal plexus

Question 4

cartilages of the larynx

Answer 4

thryoid, cricoid, epiglottis, arytenoid (paired), corniculate (paired), cuneiform (paired)

Question 5

vocal and vestibular ligaments are formed by which layers of mucosa?

Answer 5

intermediate and deep

Question 6

true vocal cord is?

Answer 6

vocal fold

Question 7

false vocal cord?

Answer 7

vestibular fold

Question 8

the vocal folds control 4 basic aspects of physiology

Answer 8

1. air going in and out of lungs.
2. protective sphincter
3. to produce sound
4. maintenence of intra-thoracic and intra-abdominal pressure (lifting heavy objects, bearing down, pooping, birth)

Question 9

intrinsic muscles of the larynx are IN GENERAL innervated by

Answer 9

recurrent laryngeal (from arches 5&6)

Question 10

which single laryngeal muscle is not innervated by the RLN?

Answer 10

cricothyroid- innervated by the superior laryngeal n.

Question 11

what does the posterior cricoaretynoid m. do?

Answer 11

only abductor of vocal cords (apart)

Question 12

what does the cricothyroid do?

Answer 12

tenses the vocal cords

Question 13

what is the function of having a high larynx?

Answer 13

can breathe and eat at the same time- seen in babies- so they can drink milk and breathe at the same time

Question 14

what is the advantage to having the descent of the larynx?

Answer 14

gained a large permanent oropharynx to form a greater variety of sounds