A+P II CH. 24, Module 16/17

Match the layer of the digestive tract with the correct description. 1. Mucosa 2. Muscularis 3. Serosa 4. Submucosa

1. Consists of an epithelial lining, a layer of connective tissue referred to as lamina propria and a thin layer of muscle 2. Throughout most of the digestive tract, this tunic consists of two layers of smooth muscle: an inner circular layer; and an outer longitudinal layer 3. Consists of a thin layer of connective tissue and simple squamous epithelium 4. Consists of a thin layer of connective tissue and simple squamous epithelium

Correctly pair each basic function of the digestive system with the correct description. 1. Absorption 2. Digestion 3. Mastication 4. Ingestion 5. Propulsion

1. Movement of molecules from the digestive tract into the circulation or lymphatic system 2. Breakdown of large organic molecules into their component parts 3. Process by which teeth break food into smaller particles to increase the total surface area 4. The intake of solid or liquid food into the stomach 5. Movement of food from one end of the digestive tract to the other

Match each movement of the digestive tract with the correct description. 1. Deglutition 2. Mass Movements 3. Peristalsis 4. Segmental Contractions

1. Moves a mass of food or liquid from the oral cavity to the esophagus 2. Forcible movements that move the contents of the large intestines 3. Muscular contractions consisting of a wave of relaxation of circular muscles followed by a wave of contraction of circular muscles 4. Muscular contractions that move food back and forth within the digestive tract to mix it with digestive secretions

The muscularis of the stomach consists of ______ layers.

3

Besides organs of the gastrointestinal tract, the digestive system also contains ______.

Accessory organs

Name the outermost or most superficial layer of the organs in the digestive tract.

Adventitia Serosa

What is peritonitis?

An inflammation of the peritoneal membranes

Which of the following are functions of the digestive tract? Select all that apply.

Digest food Absorb water Absorb electrolytes

What are the basic functions of the digestive system? Select all that apply.

Digestion Mastication Ingestion Defecation Absorption

True or False: The majority of the muscularis externa consists of two layers of skeletal muscle.

False

True or false: Most of the nervous control of the digestive system is through the parasympathetic nervous system.

False

Identify the structures of the digestive tract that are lined with stratified squamous epithelium.

Mouth Anal canal Esophagus Oropharynx

Select the mechanisms that regulate the digestive system.

Nervous mechanisms Chemical signals

Identify the major neurotransmitters that regulate the digestive system.

Norepinephrine Acetylcholine Serotonin

Which of the following functions to mix food with digestive secretions?

Segmental contractions

The abdominal cavity is lined by ______ membranes which produce a thin, lubricating film.

Serous

What muscle type makes up most of the muscularis of the gastrointestinal tract?

Smooth

Identify the structures of the digestive tract that are lined with simple columnar epithelium.

Stomach Small intestine Large intestine

What are feces?

The semi-solid waste products eliminated from the body

Describe the membranes that line the abdominal cavity.

These are serous membranes that secrete a serous lubricating fluid.

The two major divisions of the digestive system include the digestive tract and the ______ organs.

accessory

The submucosa consists of ______ tissue.

connective

The elimination of semi-solid waste products from the body is called ______.

defecation

The process that moves a bolus from the oral cavity into the esophagus is called swallowing or

deglutition

The system specialized to ingest food, digest food and absorb water, electrolytes and nutrients is the _______ system.

digestive

The majority of nervous stimulation of the digestive system comes from the _______.

enteric nervous system

The process of chewing is called

mastication

Acetylcholine, norepinephrine and serotonin are ______ that affect digestive tract ______.

neurotransmitters, motility

The serous membrane that covers the interior surface of the abdominal cavity is the ______.

parietal peritoneum

The layer of the digestive tract that is a thick layer of connective tissue containing nerves, blood vessels, lymphatics and glands is the _____.

submucosa

Mastication is the _____.

the process of mechanically breaking down food.

The serous membrane that covers the organs of the abdominal cavity is the _______ peritoneum.

visceral