Deck 15: Upper Digestive Segment

Question 1

The secretion of which cell type is needed to begin the process of digesting proteins?
A) Chief cells
A) Gastroenteroendocrine cells

A) Mucous neck cells
B) Parietal cells
C) Stem cells

Answer 1

A
Chief cells

Question 2

Which of the following are not mucosal specializations that increase absorptive surface area?

A) Enterocytes
B) Microvilli
C) Plicae circularis
D) Rugae
E) Villi

Answer 2

D
Rugae

Question 3

What cell type is most likely to be stimulated following G-cell secretion?
A) Chief cells

A) Mucous neck cells
B) Parietal cells
C) Stem cells
D) None - G-cells secrete an inhibitory substance

Answer 3

C
Parietal cells

Question 4

Meissner's plexus is located in which layer of the alimentary canal?

A) Epithelium
B) Lamina propria
C) Muscularis externa
D) Muscularis mucosa
E) Submucosa

Question 5

Which of the following gastric specializations allow for distention of the stomach?
A) Gastric areas

A) Gastric pits
B) Plicae circularis
C) Rugae
D) Villi

Question 6

The outer surface of the tooth's root is covered by _____.
A) Cementum

A) Dentin
B) Enamel
C) Gingivae
D) Pulp

Question 7

What are invaginations of gastric epithelium into the lamina propria called?

A) Crypts of Lieberkühn
B) Gastric pits
C) Plicae circularis
D) Rugae
E) Villi

Question 8

Which of the following are simple coiled tubular glands lined almost entirely with mucus-secreting cells?
A) Cardiac glands

A) Esophageal glands
B) Fundic glands
C) Gastric glands
D) Pyloric glands

Question 9

What type of papillae are the largest, least numerous, and are found at the back of the tongue?

A) Circumvallate
B) Filiform
C) Foliate
D) Fungiform
E) Lingual

Question 10

What do the surface mucous cells of the stomach do?
A) They are regenerative

A) They help reabsorb vitamin B12
B) They secrete a substance that protects the stomach lining from acid
C) They secrete hydrochloric acid
D) They secrete into the base of the gastric pit

Question 11

Which of the following structures has three poorly defined layers in the muscularis externa?
A) Esophagus

A) Large intestine
B) Small intestine
C) Stomach
D) The muscularis externa of all of the above structures has three layers

Question 12

Which of the following is lined with a very thin keratinized stratified squamous epithelium and a very highly vascular underlying lamina propria?

A) Cutaneous region of the lips
B) Dorsal tongue
C) Oral mucosal region of the lips
D) Red region of the lips
E) Ventral tongue

Question 13

Which of the following is true of the fungiform lingual papillae?
A) There are 8 to12 of them along the sulcus terminalis

A) They are single, evenly spaced, and are located on the tongue's margin
B) They are the largest lingual papillae and contain the most taste buds
C) They are the smallest and most numerous papillae and give the tongue its characteristic rough appearance
D) They help to clean oral surfaces as well as manipulate and process food

Question 14

Which of the following cells synthesize and secrete the components of dentin?

A) Ameloblasts
B) Cementoblasts
C) Odontoblasts
D) Preameloblasts
E) Preodontoblasts

Question 15

The muscularis externa of the ____ is partially striated and partially smooth.
A) Esophagus

A) Large intestine
B) Small intestine
C) Stomach
D) None of the above -- the entire alimentary canal is lined with smooth muscle