Digestive

Which layer is controlled by the plexus at A?

B ( submucosal plexus) ?

Which of the following is a function of the stomach?

Chemical and mechanical digestion

Which region produces the most HCl?

D

In which organ does protein digestion begin?

D(stomach)

Bile from the liver and digestive juices from the pancreas enter which section of the small intestine?

Duodenum

In which layer is the lamina propria found?

E

Where do mass movements occur?

E ( large intestine)

Which of the following is the correct list of tooth anatomy from the most superficial to the deepest?

Enamel, dentin, pulp

In which layer is the muscularis mucosae found?

F

The enteric nervous system regulates much of the digestive activity, but its action depends on the central nervous system.

False

The small intestine begins with the duodenum, which is its longest segment.

False ( the ileum is the longest part) the duodenum is the first part

The large intestine is longer than the small intestine.

False ( the large intestine is shorter than the small intestine)

The large intestine absorbs water, fats, and salts.

False ( the small intestine absorbs fats, the large intestine absorbs water, salts and minerals)

Each of the following lists some of the tissue layers of the digestive tract. Which one has them in correct order from lumen to external surface?

Lamina propria, muscularis mucosae, submucosa, muscularis externa, serosa

Which of the following is not involved in chemical digestion?

Large intestine

Which cell type is responsible for HCl production in the stomach?

Parietal cells

Which of the following is not normally found in saliva?

Protease

During digestion, what is the major site of nutrient absorption?

Small intestine

Both chemical and mechanical digestion start in the mouth and continue in the stomach.

True

Both pancreatic juice and bile are secreted into the duodenum.

True

Enamel is found in the crown of a tooth, whereas dentin is part of both the crown and the root.

True

Without a properly functioning large intestine a person will have chronic diarrhea.

True

The physiological process that moves a nutrient from the outside of the body to the inside is called __________.

absorption

The enzyme that catalyzes the first step reaction in HCl production by gastric parietal cells is called __________.

carbonic anhydrase

Pepsinogen is produced by __________ and is activated by __________, which is secreted by __________.

chief cells; hydrochloric acid (HCl); parietal cells

What is the function of the wrinkles at D?

digestion?

The __________ regulates digestive tract motility, secretion, and blood flow. Its neurons are found in the __________.

enteric nervous system; submucosa and muscularis externa

The __________ of the small intestine is/are similar to the __________ of the stomach.

intestinal crypts; gastric pits

The __________ stores excess glucose and releases it into the blood when needed.

liver

Which of the following is the accessory organ of digestion responsible for producing bile?

liver

The __________ synthesizes bile acids by metabolizing __________.

liver; cholesterol

The small intestine is suspended from the abdominal wall by the ___________.

mesentery

Carbohydrate digestion begins in the __________, whereas protein digestion begins in the__________.

mouth; stomach

The layer that is responsible for the motility that propels food and residue through the digestive tract is called the __________.

muscularis externa

The surface of the tongue is covered with __________ stratified squamous epithelium, and has bumps called __________, where many taste buds can be found.

nonkeratinized; lingual papillae

An example of chemical digestion is the breakdown of __________ into __________.

nucleic acids; nucleotides

Hydrochloric acid (HCl) is secreted by __________ cells.

parietal

Which of the following is not an accessory organ of digestion?

spleen

Defecation is stimulated by __________.

stretching of the rectum

Where does the greater omentum attach?

F

Where does most nutrient absorption occur?

F (small intestine)

Absorption of many nutrients starts in the stomach.

False(nutrient absorption begins in the mouth and ends in the small intestine)

The digestive system processes food, extracts nutrients, and eliminates the residue.

True

The liver is the body's largest gland.

True

The serous membranes that suspend the stomach and intestines from the abdominal wall are called __________.

mesenteries

The __________ regulates the flow of contents from the stomach to the duodenum.

pyloric sphincter

The outermost layer of the digestive tract, which is composed of a thin layer of areolar tissue and simple squamous epithelium, is called the __________.

serosa (mesentery)

Amino acids and monosaccharides are absorbed in the __________, and fatty acids are absorbed in the __________.

small intestine; small intestine

The __________ gland is an extrinsic salivary gland, whereas the __________ gland is an intrinsic salivary gland.

submandibular; lingual