Lecture 18 Flashcards Preview

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Flashcards in Lecture 18 Deck (25):
1

Mouth

Lips and cheeks
Vestibule
Oral cavity proper

2

Lips and cheeks-----

contains buccinator muscle that keeps food between upper & lower teeth

3

Vestibule---

area between cheeks and teeth

4

Oral cavity proper---

the roof = hard, soft palate and uvula
floor = the tongue

5

Pharyngeal Arches: 2 skeletal muscles

Palatoglossal muscle
Palatopharyngeal muscle

6

Palatoglossal muscle:

extends from palate to tongue
forms the first arch
posterior limit of the mouth

7

Palatopharyngeal muscle:

extends from palate to pharyngeal wall
forms the second arch
behind the palatine tonsil

8

Salivary Glands:

Parotid
Submandibular
Sublingual

9

Composition and Functions of Saliva:

1. Wet food for easier swallowing
2. Dissolves food for tasting
3. Bicarbonate ions buffer acidic foods
4. Chemical digestion of starch begins with enzyme (salivary amylase)
5. Enzyme (lysozyme) ---helps destroy bacteria
6. Protects

10

Increase salivation:

1. sight, smell, sounds, memory of food, tongue stimulation---rock in mouth
2. cerebral cortex signals the salivatory nuclei
3. parasympathetic nn.

11

Stop salivation:

1. dry mouth when you are afraid
2. sympathetic nerves

12

Myxovirus

Mumps
attacks the parotid gland

13

Symptoms of Myxovirus:

-inflammation and enlargement of the parotid
-fever, malaise & sour throat (especially swallowing sour foods)
-swelling on one or both sides

14

Structure and Function of the Tongue:

-Papillae
-attached to hyoid, mandible, hard palate and styloid process

15

Papillae:

are the bumps---taste buds are protected by being on the sides of papillae

16

Tooth Structure:

Crown
Neck
Roots
Pulp cavity

17

Enamel

-hardest substance in body
-calcium phosphate or carbonate

18

Dentin:

calcified connective tissue

19

Cementum:

-bone-like
-periodontal ligament penetrates it

20

Primary or baby teeth:

-20 teeth that start erupting at 6 months
-1 new pair of teeth per month

21

Permanent teeth:

-32 teeth that erupt between 6 and 12 years of age
-differing structures indicate function

22

Mechanical digestion (mastication or chewing):

-breaks into pieces
-mixes with saliva so it forms a bolus

23

Chemical digestion

Amylase
Lingual lipase

24

amylase:

-begins starch digestion at pH of 6.5 or 7.0 found in mouth
-when bolus & enzyme hit the pH 2.5 gastric juices hydrolysis ceases

25

lingual lipase:

-secreted by glands in tongue
-begins breakdown of triglycerides into fatty acids and glycerol