(07) Digestive System II - Oral Cavity Cont

Question 1

(Salivary Glands open into the oral cavity and are divided into two groups based on size and complexity)

(Salivary glands receive sympathic and parasympathetic innervation)

1. sympathetic = ? saliva?
2. parasympathetic?

Answer 1

1. thick
2. watery

Question 2

(Salivary Glands)

1. Minor salivary glands are scattered in what of oral cavity? Named for their what?
2. Which glands are compound (grossly dissectable) glands? Encapsulated with thin what between lobules?
3. May find what within the lobules?
4. These glands are typically what in organization?

Answer 2

1. CT; location
2. major salivary glands; septa
3. loose CT, lymphocytes, and/or plasma cells
4. compound tubuloacinar

Question 3

(Salivary Glands)

1. the parotid salivary gland has predominantly what kind of secretion?
2. The mandibular, sublingual, zygomatic, and molar (buccal) salivary glands has what kind of secretion?

Answer 3

1. serous
2. mixed serous/mucous

Question 4

(Secretory Cells of Salivary Glands)

1. Serous Cells form what (aka what?) which cap mucous acini? What between the mucous cells connect demilune cells to gland lumen?

Answer 4

1. acini (demilunes); canaliculi

(both acinar and demilune cells have apical membrance bound granules and well devloped RER and golgi)

Question 5

(Secretory Cells of salivary glands)

1. Mucous cells form what or what?
2. Why do cell apices appear empty in fixation?

Answer 5

1. acini or tubuloacinar units

(have apical mucinogen granules, flattened basal nuclei, and basal RER and golgi)

2. loss of mucinogen

Question 6

(Secretory Cells of Salivary Glands)

1. Myoepithelial cell process surround both what and what? Located on what side of the basal lamina?
2. What helps move secretions along the duct systems?

Answer 6

1. acini and intercalated ducts; epithelial side
2. contration of the cell processes

Question 7

1. The duct system of salivary glands is branched and several different types of ducts can be identified by size, postition and amount of associated connective tissue

Question 8

(there are two types of intralobular secretory ducts which secrete H2O and electrolytes)

1-2. name them

Answer 8

1. intercalated ducts
2. striated ducts

Question 9

(there are two types of intralobular secretory ducts)

(Intercalated ducts)

1. largest or smallest part of duct system?
2. comprised of what cell type?
3. These ducts are very short and inconspicuous, and arise directly from what?

Answer 9

1. smallest
2. pale cuboidal cells
3. the acini

Question 10

(two types of intralobular secretory ducts)

(straited ducts)

1. intercalated ducts are continuous with striated ducts
2. Lined by what which constitue a transport epithelium?
3. What are a result of babsal mitochondria aligned between plasma membrane infoldings and basolateral interdigitating processes which provide increased membrane area for ion trasport process?
4. Are striated ducts prominent in zygomatic or molar glands which are predominantly of the mucous type?

Answer 10

2. columnar cells
3. striations
4. no

Question 11

(The excretory duct system consists of what two types of ducts?)

Answer 11

1. interlobular duct
2. main duct

Question 12

(excretory duct system)

1. Which one has columar to stratifed cuboidal epithelium surrounded by a thin CT layer?

Answer 12

1. interlobular duct

Question 13

(The excretory duct system)

1. Which is the terminal portion of the system, which may have a stratifed cuboidal epithelium?
2. Near the opening the epithelium usually becomes what?
3. Main ducts open into the what and may contain what?

Answer 13

1. the main duct;
2. stratified squamous
3. oral cavity, goblet cells

Question 14

1. The structure of minor glands are similar to major salivary glands except for what two things?
2. Are secretory lobules similar to those of major salivary glands?
3. Is the duct system less extensive? ducts are lined by what?
4. are there any striated ducts?

Answer 14

1. smaller and less complex
2. yes
3. yes; cuboidal to stratified cuboidal epithelium
4. no

Question 15

(Functions of the salivary glands)

1. protection of the what?
2. production of what for dry ingesta?
3. provide what for rumen, and pH adjustment?
4. Source of what from adjacent plasma cells and perhaps hormones?
5. production of what?
6. regulation of what?

Answer 15

1. oral cavity and teeth
2. lubricant
3. fluid

4 IgA

5. digestive enzymes (not important in most animals)
6. electrolyte balance

Question 16

Identify salivary glands as mucous, serous, or mixed depending on what?

Answer 16

predominant type of secretory units