BIO 169 - Connect Chapter 24 - Digestive System

Match the layer of the digestive tract with the correct description. 1. Mucosa -------- Consists of an epithelial lining, a layer of connective tissue referred to as lamina propria and a thing layer of muscle 2. Muscularis ------ 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. Serosa ------ Consists of a thin layer of connective tissue and simple squamous epithelium 4. Submucosa ----- Consists of a thick layer of connective tissue containing nerves, blood vessels, lymphatics and glands

1. Mucosa -------- Consists of an epithelial lining, a layer of connective tissue referred to as lamina propria and a thing layer of muscle 2. Muscularis ------ 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. Serosa ------ Consists of a thin layer of connective tissue and simple squamous epithelium 4. Submucosa ----- Consists of a thick layer of connective tissue containing nerves, blood vessels, lymphatics and glands

Match the oral cavity region to its description. 1. Vestibule ---- Space between the lips and teeth 2. Oral cavity proper ------ Space medial to the teeth

1. Vestibule ---- Space between the lips and teeth 2. Oral cavity proper ------ Space medial to the teeth

Identify the major neurotransmitters that regulate the digestive system. Select all that apply. A. Acetylcholine B. Norepinephrine C. Dopamine D. GABA E. Serotonin

A. Acetylcholine B. Norepinephrine E. Serotonin

Identify the structures of the digestive tract that are lined with stratified squamous epithelium. Select all that apply. A. Mouth B. Small intestine C. Anal canal D. Esophagus E. Stomach F. Oropharynx

A. Mouth C. Anal canal D. Esophagus F. Oropharynx

The oral cavity is divided into two regions: the _____, which is the space between the lips or the cheeks and the teeth and the ______, which lies medial to the teeth. A. vestibule, oral cavity proper B. oral cavity proper, vestibule

A. vestibule, oral cavity proper

What muscle type makes up most of the muscularis of the gastrointestinal tract? A. Skeletal B. Smooth C. Cardiac

B. Smooth

Besides organs of the gastrointestinal tract, the digestive system also contains ______. A. skeletal muscles B. accessory organs C. the mouth D. integumentary glands

B. accessory organs

The ______ part of the tongue is freely moveable. A. posterior B. anterior

B. anterior

The muscle in the cheeks is the ______. A. frontalis B. buccinator C. orbicularis oculi D. orbicularis oris

B. buccinator

The layer of the digestive tract that is a thick layer of connective tissue containing nerves, blood vessels, lymphatics and glands is the _____. A. mucosa B. submucosa C. serosa D. muscularis

B. submucosa

Select the mechanisms that regulate the digestive system. Select all that apply. A. Blood hydrogen ion concentrations B. Plasma oxygen concentrations C. Nervous mechanisms D. Chemical signals

C. Nervous mechanisms D. Chemical signals

Identify the structures of the digestive tract that are lined with simple columnar epithelium. Select all that apply. A. Oropharynx B. Mouth C. Small intestine D. Large intestine E. Stomach F. Anal canal

C. Small intestine D. Large intestine E. Stomach

The majority of nervous stimulation of the digestive system comes from the _______. A. parasympathetic nervous system B. sympathetic nervous system C. enteric nervous system

C. enteric nervous system

Permanent teeth replace milk or ______ teeth.

Correct Answer: deciduous, primary, or baby

Name the outermost or most superficial layer of the organs in the digestive tract. Select all that apply. A. Lamina propria B. Mucosa C. Muscularis D. Serosa E. Adventitia

D. Serosa E. Adventitia

The submucosa consists of ______ tissue. A. epithelial B. skeletal muscle C. smooth muscle D. connective

D. connective

The elimination of semi-solid waste products from the body is called ______. A. chemical digestion B. deglutition C. mastication D. defecation

D. defecation

Acetylcholine, norepinephrine and serotonin are ______ that affect digestive tract ______. A. food by-products, absorption B. inhibitors, elimination C. carbohydrates, secretions D. neurotransmitters, motility

D. neurotransmitters, motility

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

False

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

False

True or false: Both nervous and chemical mechanisms play an important role in regulating the digestive system. True False

True

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

accessory

Feces are eliminated from the body by the process of _______.

defecation

The adventitia or _______ is the outermost layer of structures in the digestive system.

serosa

The layer of the digestive tract that consists of connective tissue containing nerves, blood vessels, lymphatic vessels, small glands, and a network of nerve cells is the ____________.

submucosa