Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
|
What is the role of the digestive system?
|
1. Absorption and utilization by cells of body
2. Elimination of food material not absorbed-Feces 3. Depends on Endo/Exocrine secretions |
|
|
What is digestion?
|
Altering the physical and chemical composition of ingested food material so it can be absorbed and used by the body.
|
|
|
What is the first step in the digestive process?
|
Mechanical Digestion
|
|
|
What happens during mechanical digestion?
|
Physical breakdown of ingested food into smaller pieces that permits effective mixing with digestive secretions
|
|
|
What is the second step in the digestive process?
|
Chemical Digestion
|
|
|
What happens during chemical digestion?
|
Results in the release of nutrient "end products." i.e. glucose and amino acids-absorbed as an energy source or for other metabolic functions
|
|
|
What is the Alimentary Canal (tract) commonly known as?
|
Gastrointestinal Tract (GI)
|
|
|
What organs are not digestive organs but they assist in orienting the digestive organs to other important body structures?
|
Larynx, Trachea, Diaphragm, and Spleen
|
|
|
Name the segments of the Gastrointestinal Tract.
|
Mouth, Oropharynx, Esophagus, Stomach, Small Intestine (Duodenum, Jejunum, Ileum)
Large Intestine: Cecum, Colon (Ascending, Transverse, Descending, Sigmoid) Rectum, Anal canal |
|
|
Name the four layers of tissues of the GI tract.
|
Mucosa, Submucosa, Muscularis, Serosa
|
|
|
Name the innermost layer of the GI wall
|
Mucosa
|
|
|
Name the three layers of the mucosa.
|
1. Mucous epithelium
2. Lamina propria 3. Muscularis mucosae |
|
|
This structure is composed of connective tissue and is thicker than the mucosal layer.
|
Submucosa
|
|
|
What is the structure that contains numerous small glands, blood vessels, and parasympethetic nerves called?
|
Submucosal plexus (Meissner plexus)
|
|
|
What structure does the Muscularis layer wrap around?
|
Thick layer of muscle that wraps around the submucosa.
|
|
|
What does the Mucularis layer consist of?
|
Inner layer of circular and an outer layer of longitudinal smooth muscle.
|
|
|
Where is the Myenteric plexus (Auerbach plexus) located at?
|
In between the circular and longitudinal smooth muscle layer.
|
|
|
What role do the intramural plexus play?
|
Together they play an important role in the regulation of digestive tract movement and secretion
|
|
|
What is the intramural plexuses?
|
Myenteric plexus and Submucosal plexus
|
|
|
Name the outermost layer of the GI wall and made up of a connective tissue layer and peritoneum?
|
Serosa
|
