CHAPTER 23 DIGESTIVE SYSTEM REVIEW QUESTIONS AND
CONCEPTS |COMPLETE STUDY GUIDE WITH 100%
ACCURATE QUESTIONS &ANSWERS. EXCELLENCE
GUARANTEED.
Form the mouth to anus, food passes through all these structures except the ______
Esophagus
Liver
Stomach
Intestines Answer: Liver
Which of the following structures is located in the thoracic cavity, penetrates the diaphragm, and
delivers its content to the stomach?
Liver
Pancreas
Esophagus
Stomach Answer: Esophagus
What are the four layers of the digestive tract? Answer: mucosa, submucosa, muscle layer,
serosa
What are the two types and functions of muscle movement achieved by gastrointestinal smooth
muscle? Answer: Segmentation - alternate contraction and relaxation of the stomach digest the
food mechanically and mix the particles with digestive juices
1
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, Peristalsis - a rhythmic alternating contraction and relaxation of the muscles that pushes the food
in a forward direction through the digestive tract
What is the role of the enteric nervous system? Answer: The ENS regulates GI motility and
secretion; it's activity is modulated by autonomic nerves, especially the parasympathetic (vagal)
fibers
Differentiate between digestion and absorption Answer: Digestion: the process by which food is
broken down into smaller particles suitable for absorption
Absorption: the process whereby the end products of digestion move across the walls of the
digestive tract into the blood and lymph for distribution throughout the body
Differentiate between mechanical and chemical digestion Answer: Mechanical: the breakdown
of large food particles into smaller pieces by physical means; usually by chewing and mashing of
muscles in digestive tract
Chemical: the chemical alteration of food; achieved by digestive enzymes, stomach acid, and
bile
The innermost layer of the digestive tract is the ______
Submucosa
Serosa
Circular muscle layer
Mucosa Answer: Mucosa
All the muscles in the digestive tract are oriented in a longitudinal direction T/F Answer: False
Which word does not refer to the salivary glands?
Parotid
2
APPHIA - Crafted with Care and Precision for Academic Excellence.
CONCEPTS |COMPLETE STUDY GUIDE WITH 100%
ACCURATE QUESTIONS &ANSWERS. EXCELLENCE
GUARANTEED.
Form the mouth to anus, food passes through all these structures except the ______
Esophagus
Liver
Stomach
Intestines Answer: Liver
Which of the following structures is located in the thoracic cavity, penetrates the diaphragm, and
delivers its content to the stomach?
Liver
Pancreas
Esophagus
Stomach Answer: Esophagus
What are the four layers of the digestive tract? Answer: mucosa, submucosa, muscle layer,
serosa
What are the two types and functions of muscle movement achieved by gastrointestinal smooth
muscle? Answer: Segmentation - alternate contraction and relaxation of the stomach digest the
food mechanically and mix the particles with digestive juices
1
APPHIA - Crafted with Care and Precision for Academic Excellence.
, Peristalsis - a rhythmic alternating contraction and relaxation of the muscles that pushes the food
in a forward direction through the digestive tract
What is the role of the enteric nervous system? Answer: The ENS regulates GI motility and
secretion; it's activity is modulated by autonomic nerves, especially the parasympathetic (vagal)
fibers
Differentiate between digestion and absorption Answer: Digestion: the process by which food is
broken down into smaller particles suitable for absorption
Absorption: the process whereby the end products of digestion move across the walls of the
digestive tract into the blood and lymph for distribution throughout the body
Differentiate between mechanical and chemical digestion Answer: Mechanical: the breakdown
of large food particles into smaller pieces by physical means; usually by chewing and mashing of
muscles in digestive tract
Chemical: the chemical alteration of food; achieved by digestive enzymes, stomach acid, and
bile
The innermost layer of the digestive tract is the ______
Submucosa
Serosa
Circular muscle layer
Mucosa Answer: Mucosa
All the muscles in the digestive tract are oriented in a longitudinal direction T/F Answer: False
Which word does not refer to the salivary glands?
Parotid
2
APPHIA - Crafted with Care and Precision for Academic Excellence.
