Deck 25: Histology of the Salivary Glands

Question 1

Serous acinus secretions are characterized by each of the following EXCEPT one.Which one is the EXCEPTION?

A) Serous secretions contain no mucins.
B) More water content
C) Small lumen
D) Cuboidal in shape
E) Primary source of amylase

Answer 1

D
Serous cells are pyramidal in shape.Note that mucous cells are also pyramidal.The absence of mucins makes serous secretions thinner and more watery than those of mucous cells.It is appropriate that the lumen in serous acini is smaller because the secretions are thinner.Amylase is a carbohydrate-splitting enzyme.

Question 2

A duct that has infolds of the basal cell membrane is a striated duct.Intercalated ducts,also striated,are very small and directly drain the acini.

A) Both statements are true.
B) The first statement is true;the second statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Answer 2

A
Striated ducts with infolds of the basal cell membrane have mitochondria that stain during laboratory evaluation.Staining makes the mitochondria appear striped,hence the term striated.Intercalated ducts do not have striations.

Question 3

Secretory control comes from the central nervous system.Control of secretion is tied to chewing,taste,and smell.

A) Both statements are true.
B) The first statement is true;the second statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Answer 3

C
The parasympathetic division of the autonomic nervous system primarily controls salivary secretion.

Question 4

Intralobular ducts are located between lobules.They carry secretions to the next set of ducts.

A) Both statements are true.
B) The first statement is true;the second statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question 5

Each of the following accurately describes intercalated ducts EXCEPT one.Which one is the EXCEPTION?

A) Intercalated ducts are large and interlobulated.
B) They drain directly into the acini.
C) The cells of intercalated ducts are slightly taller than their nuclei.
D) Intercalated ducts deliver secretions unchanged to the next set of ducts.

Question 6

Which acini are MOST likely to have serous demilunes?

A) Mucous
B) Serous
C) Seromucous
D) All of the above

Question 7

The demilune surrounds the salivary gland and aids in the secretion of saliva.This structure has a muscular component and long cellular projections.

A) Both statements are true.
B) The first statement is true;the second statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question 8

Acini are the

A) mucous and serous secretions
B) connective tissue capsules
C) secretory end pieces
D) intratubular ducts

Question 9

Secretory function can be modified by each of the following EXCEPT one.Which one is the EXCEPTION?

A) Chewing
B) Taste
C) Smell
D) Dehydration
E) Tubelike acinal endpieces

Question 10

The squid like appearance of a myoepithelial cell is due to

A) cellular projections
B) vasodilation
C) intralobular ducts
D) interlobular ducts

Question 11

Which structure is the MOST likely to break down starches into long-chain sugars?

A) Mucous acini
B) Serous acini
C) Seromucous acini
D) Connective tissue
E) Salivary ducts

Question 12

Each of the following is true of the connective tissue capsule EXCEPT one.Which one is the EXCEPTION?

A) A salivary gland is surrounded by a connective tissue capsule.
B) The connective tissue capsule sends partitions into the gland.
C) The connective tissue capsule has varying numbers of lobules.
D) The connective tissue capsule is a source of nerves and blood vessels.

Question 13

Merocrine secretion is the process utilized by salivary acini to move saliva into the duct system.While mucous and serous acini utilize only the merocrine process,seromucous acini also employ a process involving immunoglobulins and lysozymes.

A) Both statements are true.
B) The first statement is true;the second statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question 14

Intercalated ducts conserve water and electrolytes because ions such as sodium and potassium are reabsorbed by capillaries and lymphatic vessels surrounding striated interlobular ducts.

A) Both the statement and the reason are correct and related.
B) Both the statement and the reason are correct but are NOT related.
C) The statement is correct,but the reason is NOT correct.
D) The statement is NOT correct,but the reason is correct.
E) NEITHER the statement NOR the reason is correct.

Question 15

Each of the following is true of salivary duct systems EXCEPT one.Which one is the EXCEPTION?

A) Depending on their size,salivary glands have varying numbers of lobules.
B) Intralobulated refers to ducts that are located within the tubule.
C) Interlobulated refers to ducts within connective tissue between lobules of the gland.
D) Striation only occurs in interlobular ducts.

Question 16

Each of the following is carried in the saliva EXCEPT one.Which one is the EXCEPTION?

A) Lysosomes
B) Sodium
C) Potassium
D) Bicarbonate
E) Golgi apparatus

Question 17

Serous acini have ions similar to mucous acini but do not have mucins.A mucous secretion is thinner and more watery.

A) Both statements are true.
B) The first statement is true;the second statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question 18

Salivary glands arise from a cord of epithelium that forms a tube.Their endpiece is pyramidal in shape.

A) Both statements are true.
B) The first statement is true;the second statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question 19

The primary function of excretory ducts is to carry saliva.However,the striated interlobular ducts also modify salivary content as the fluid passes through them.

A) Both statements are true.
B) The first statement is true;the second statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question 20

Surrounding the acini are myoepithelial cells that inhibit salivary secretion because these cells have the ability to contract like a muscle.

A) Both statements are true.
B) The first statement is true;the second statement is false.
C) The first statement is false;the second statement is true.
D) Both statements are false.

Question 21

With electron microscopy mucous cells appear empty and frothy because they stain exceptionally well.

A) Both the statement and the reason are correct and related.
B) Both the statement and the reason are correct but are NOT related.
C) The statement is correct,but the reason is NOT correct.
D) The statement is NOT correct,but the reason is correct.
E) NEITHER the statement NOR the reason is correct.

Question 22

All of the following are functions of saliva EXCEPT one.Which one is the EXCEPTION?

A) It acts as a buffer.
B) It has immunoglobulins to combat illness.
C) It carries an enzyme to break down fats.
D) It helps to prepare the bolus of food when swallowing.

Question 23

The acinus with the largest lumen is the serous type.

Question 24

During formation,the "future saliva" is packaged by a membrane within the

A) endoplasmic reticulum
B) Golgi apparatus
C) cytoplasm
D) mitochondria

Question 25

Which of the following are true of demilunes (Select all that apply. )?

A) They are present in seromucous acini.
B) They are a group of serous cells arranged in half-moon clusters.
C) They are only present in connective tissue.
D) They secrete their product between the cell walls of underlying mucous cells.
E) They are the primary source of amalyse.

Question 26

Intercalated ducts modify the salivary fluid that passes through them.

Question 27

Which ducts have mitochondria that appear striped when stained (Select all that apply. )?

A) All intralobular
B) Intralobular intercalated
C) Intralobular secretory
D) All interlobular
E) Some interlobular

Question 28

Mucous secretions contain 99% water.

Question 29

When cells secrete their products,the cell membrane is destroyed.