Lecture Exam 3 (1)

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Question #1

“Segmentation” within the small intestine refers to the

A division of function between the different segments of the small intestine.

B back-and-forth motion that mixes chyme with glandular secretions.

C propulsion of material between the segments of the GI tract.

D gastroileal reflex that moves materials from the stomach to the large intestine.

Question #2

The outer layer of the muscularis of the colon is discontinuous (does not entirely surround the colon), and forms the bundles of smooth muscles known as the teniae coli.

A TRUE

B FALSE

Question #3

Which is not a lobe of the liver?

A Left lobe

B Quadrate lobe

C Caudate lobe

D Round lobe

E Right lobe

Question #4

The accumulation of large amounts of adipose tissue in the ________ that extends from the inferolateral surface of the stomach can form what is commonly called a “beer belly.”

A greater omentum

B lesser omentum

C mesentery proper

D falciform ligament

E mesocolon

Question #5

If a fatty meal has been ingested, the liver and gallbladder need to be alerted about the need for bile. The receptors that are responsible for sensing the fat in the ingested food are referred to as

A bilireceptors.

B chemoreceptors.

C omental neurons

D osmodetectors.

E mechanoreceptors.

Question #6

The projections on the superior surface of the tongue, some of which house taste buds, are the

A cilia.

B rugae.

C glossal spines.

D papillae.

E tonsils.

Question #7

An increased secretion of watery saliva will result when the

A basal nuclei of the brainstem activate sympathetic pathways to salivary glands.

B salivary nuclei of the brainstem activate parasympathetic pathways to salivary glands.

C glossopharyngeal nuclei of the pons activate somatic and sympathetic pathways to the salivary glands.

D salivary nuclei of the cerebrum activate sympathetic pathways to salivary glands.

E basal nuclei of the cerebrum activate somatic pathways to salivary glands.

Question #8

Which bones form the hard palate?

A Palatine bones and maxillae

B Ethmoid and sphenoid bones

C Maxillae and inferior nasal conchae

D Palatine bones

E Maxillae and sphenoid

Question #9

The ________ are considered the opening from the oral cavity to the oropharynx.

A fauces

B conchae

C fossae

D glossus

E choana

Question #10

Vitamin K and B vitamins produced by bacteria of the large intestine are absorbed into the blood.

A TRUE

B FALSE

Question #11

The term “canines” describes the teeth that

A are only found as permanent teeth.

B bear dental cusps for cutting and grinding.

C are lateral to the incisors, used for puncturing and tearing.

D are most anterior, used for slicing and cutting.

Question #12

Peristalsis

A All of the choices are correct.

B is the alternating contraction of muscle layers in the GI tract wall that propels materials through the tract.

C involves back-and-forth movement for mixing.

D involves the opening and closing of muscular sphincters.

E is under voluntary control.

Question #13

For the majority of the GI tract, which layer(s) of the wall contain smooth muscle?

A Muscularis only

B Submucosa and muscularis

C Mucosa and adventitia

D Serosa only

E Mucosa and muscularis

Question #14

Pepsinogen is an

A active enzyme that is released in the small intestine and digests carbohydrates.

B inactive precursor to the enzyme pepsin that digests proteins in the stomach.

C active enzyme that digests proteins within the small intestine.

D inactive precursor to a nonspecific enzyme that is synthesized in the pancreas and released in the small intestine.

Question #15

The pharynx is lined with a keratinized epithelium to protect against abrasion.

A FALSE

B TRUE

Question #16

Which organ is retroperitoneal?

A Stomach

B Jejunum

C Pancreas

D Cecum

E Transverse colon

Question #17

Amylase from saliva digests

A protein.

B glucose.

C lipids.

D starch.

Question #18

The gallbladder is part of the gastrointestinal tract.

A TRUE

B FALSE

Question #19

Which of the following is considered to be one of the primary digestive system hormones?

A Hydrochloric acid

B Pancreatic amylase

C Bile

D Gastrin

Question #20

What is the correct order for the layers of the GI tract wall, from innermost (next to lumen) to outermost?

A Muscularis – mucosa – adventitia/serosa – submucosa

B Mucosa – submucosa – adventitia/serosa – muscularis

C Adventitia/serosa – mucosa – submucosa – muscularis

D Mucosa – submucosa – muscularis – adventitia/serosa

E Adventitia/serosa – muscularis – mucosa – submucosa

Question #21

Which duct transports bile to and from the gallbladder?

A Cystic duct

B Hepatopancreatic duct

C Common bile duct

D Hepatic duct

E Pancreatic duct

Question #22

An organ that helps break down food but is not part of the tube through which the foodstuffs pass is referred to as a(n)

A diffuse ingestive structure.

B alimentary canal organ.

C accessory digestive organ.

D chemically digesting organ.

E organ of mastication.

Question #23

The inferior esophageal sphincter is also known as the

A cardiac sphincter.

B pharyngoesophageal sphincter.

C esophageal hiatus.

D pharyngealgastric sphincter.

E pyloric sphincter.

Question #24

Mastication is a process that facilitates

A propulsion of materials through the intestine, and it involves simultaneous secretion of enzymes.

B swallowing of food, and it increases the surface area of the food for exposure to enzymes.

C absorption of nutrients into the bloodstream, and it involves carrier proteins in the epithelium.

D mixing of food within the stomach, and it occurs with simultaneous hormone secretion there.

Question #25

The central cavity of a tooth is filled with

A cementum.

B enamel.

C pulp.

D dentin.

E calcium phosphate.

Question #26

Hemoglobin is crucial for oxygen transport in the blood because oxygen has a ________ solubility coefficient in water.

A high

B low

Question #27

The expiratory reserve volume plus the residual volume equals the

A tidal volume.

B functional residual capacity.

C inspiratory reserve volume.

D forced expiratory volume.

E vital capacity.

Question #28

The lungs remain inflated because

A intrapulmonary pressure is less than intrapleural pressure.

B intrapleural pressure is exactly equal to intrapulmonary pressure.

C intrapleural pressure is less than intrapulmonary pressure.

D intrapleural pressure is exactly equal to atmospheric pressure.

Question #29

The larynx is supported by nine pieces of cartilage. Which cartilages occur in pairs?

A Thyroid and corniculate

B Corniculate and cricoid

C Cricoid, corniculate, and arytenoid

D Corniculate, cuneiform, and arytenoid

E Arytenoid and epiglottis

Question #30

What structures are used by both the respiratory and digestive systems?

A Paranasal sinuses

B Laryngopharynx and larynx

C Laryngopharynx and esophagus

D Oropharynx and laryngopharynx

E Nasal cavity and nasopharynx

Question #31

An increase in the partial pressure of CO 2 causes bronchioles to

A constrict.

B dilate.

Question #32

At rest, a normal person breathes about ________ times per minute.

A 50

B 26

C 12

D 32

E 8

Question #33

What changes in the blood levels of respiratory gases result from hyperventilation?

A Oxygen levels do not change but carbon dioxide levels fall.

B Oxygen and carbon dioxide levels rise.

C Oxygen levels rise and carbon dioxide levels fall.

D Oxygen and carbon dioxide levels fall.

Question #34

On each side of the chest, the ________ pleura lines the internal thoracic wall, and the ________ pleura tightly covers the lung.

A respiratory; pleural

B fibrous; serous

C visceral; parietal

D thoracic; pulmonary

E parietal; visceral

Question #35

Bronchial arteries carry ________ blood to the tissues of the lung.

A deoxygenated

B oxygenated

Question #36

During expiration, relaxation of the diaphragm and external intercostals

A flattens the floor of the thoracic cavity.

B increases the pressure in the thoracic cavity.

C increases the volume of the thoracic cavity.

D expands the rib cage.

E stimulates the phrenic nerve.

Question #37

If all else remains equal, an increase in the difference between atmospheric and alveolar pressure results in an increase in airflow.

A FALSE

B TRUE

Question #38

The depth and rate of respiration influence blood levels of hydrogen ion.

A FALSE

B TRUE

Question #39

The most common cell making up the alveolar wall is the

A dust cell.

B septal cell.

C alveolar type I cell.

D alveolar type II cell.

E alveolar macrophage.

Question #40

An increase in dead space results in

A an increase in alveolar ventilation but no change in pulmonary ventilation.

B decreases in both alveolar and pulmonary ventilation.

C a decrease in alveolar ventilation but no change in pulmonary ventilation.

D an increase in alveolar ventilation but a decrease in pulmonary ventilation.

E increases in both alveolar and pulmonary ventilation.

F a decrease in alveolar ventilation but an increase in pulmonary ventilation.

Question #41

The hilum of the lung

A is an indented area through which the bronchi, pulmonary vessels, lymphatic vessels, and nerves pass.

B is an elevated area through which the trachea, pulmonary vessels, and nerves pass.

C serves to anchor all pulmonary structures to the mediastinum.

D is the point of exit of exhaled air.

E is the point of entrance for inhaled air.

Question #42

Compared to its partial pressure in the atmosphere, oxygen’s partial pressure in the alveoli is

A higher.

B equivalent.

C lower.

Question #43

Food is normally prevented from entering the nasopharynx by the

A closure of the nasal conchae.

B constriction of the esophagus.

C elevation of the soft palate.

D depression of the hard palate.

E elevation of the epiglottis.

Question #44

The anatomic features of the respiratory membrane that make alveolar gas exchange so efficient are

A the high degree of moisture and the large ratio of volume to surface area.

B its hearty thickness and the presence of oxygen transport pumps.

C its large surface area and minimal thickness.

D its thinness, high water content, and scarcity of capillaries.

Question #45

About 70% of the CO 2 that diffuses into systemic capillaries

A combines with water to form carbonic acid, which then dissociates into bicarbonate and hydrogen ions.

B forms carbonic anhydrase, which combines carbonic acid and water to solubilize the CO2.

C binds to hemoglobin.

D directly dissolves in the plasma.

Question #46

The bronchial circulation is a component of the pulmonary circulation.

A TRUE

B FALSE

Question #47

The chest wall is anatomically configured to contract inwardly, so that when the thorax is opened surgically its walls collapse.

A TRUE

B FALSE

Question #48

Terminal bronchioles of the lower respiratory system are lined with

A simple cuboidal epithelium.

B keratinized stratified squamous epithelium.

C nonkeratinized stratified squamous.

D pseudostratified ciliated columnar epithelium.

E stratified columnar epithelium.

Question #49

Which answer places the following events in proper order for pulmonary ventilation?
a: Thoracic cavity volume changes.
b: Brainstem nuclei stimulate skeletal muscles to contract.
c: Air flows down its pressure gradient.
d: Dimensional changes in the thorax lead to pressure changes within the lung.

A c, a, d, b

B a, c, d, b

C d, c, b, a

D b, a, d, c

E b, d, c, a

Question #50

The involuntary, rhythmic activities that deliver and remove respiratory gases are regulated in the

A brainstem.

B occipital lobe of the brain.

C cerebral nuclei.

D cerebellum.

E midbrain.

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