Biology 2060 - Anatomy and Physiology II » Summer 2021 » Lecture Exam 3 (2)
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Question #1
The lungs remain inflated because
A.
intrapleural pressure is exactly equal to atmospheric pressure.
B.
intrapleural pressure is less than intrapulmonary pressure.
C.
intrapleural pressure is exactly equal to intrapulmonary pressure.
D.
intrapulmonary pressure is less than intrapleural pressure.
Question #2
Which statement accurately describes alveolar exchange of oxygen?
A.
Oxygen diffuses from the alveolus to the blood because the alveolus has a lower partial pressure of oxygen.
B.
Oxygen diffuses from the alveolus to the blood because the alveolus has a higher partial pressure of oxygen.
C.
Oxygen diffuses from the blood to the alveolus because the alveolus has a higher partial pressure of oxygen.
D.
Oxygen diffuses from the blood to the alveolus because the alveolus has a lower partial pressure of oxygen.
Question #3
What prevents the trachea from collapsing?
A.
The surrounding muscles
B.
The internal air pressure within the trachea
C.
The C-shaped cartilaginous rings
D.
The internal epithelium
Question #4
Airflow is ________ related to the pressure gradient and ________ related to resistance.
A.
directly; inversely
B.
inversely; directly
C.
inversely; inversely
D.
directly; directly
Question #5
Which do not belong to the respiratory zone of the respiratory system?
A.
Pulmonary alveoli
B.
Alveolar sacs
C.
Alveolar ducts
D.
Respiratory bronchioles
E.
Terminal bronchioles
Question #6
Which statement is true regarding secondary bronchi?
A.
Each lung has three secondary bronchi.
B.
The left lung has two secondary bronchi and the right lung has three secondary bronchi.
C.
Each lung has four secondary bronchi.
D.
The right lung has two secondary bronchi and the left lung has three secondary bronchi.
E.
Each lung has two secondary bronchi.
Question #7
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 #8
Which is not part of the conducting portion of the respiratory system?
A.
Alveoli
B.
Larynx
C.
Trachea
D.
Nasal cavity
E.
Bronchi
Question #9
Breathing muscles such as the diaphragm are controlled by neurons of the ________ nervous system.
A.
somatic
B.
autonomic
C.
enteric
Question #10
Which of the following has the highest partial pressure of carbon dioxide?
A.
The blood circulating in systemic arteries
B.
The alveoli of the lungs
C.
The systemic cells
Question #11
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.
d, c, b, a
C.
b, d, c, a
D.
b, a, d, c
E.
a, c, d, b
Question #12
In addition to oxygen, hemoglobin also transports
A.
iron and albumin.
B.
calcium and carbon dioxide.
C.
carbon dioxide and hydrogen ions.
D.
carbonic acid and bicarbonate ions.
Question #13
What is the name of the column of neurons within the medulla that initiates neural impulses for inspiration and expiration?
A.
Ventral respiratory group
B.
Pontine respiratory center
C.
Phrenic nucleus
D.
Dorsal respiratory group
Question #14
The hilum of the lung
A.
is the point of exit of exhaled air.
B.
is an elevated area through which the trachea, pulmonary vessels, and nerves pass.
C.
is the point of entrance for inhaled air.
D.
serves to anchor all pulmonary structures to the mediastinum.
E.
is an indented area through which the bronchi, pulmonary vessels, lymphatic vessels, and nerves pass.
Question #15
Pulmonary fibrosis
A.
increases elasticity, thereby increasing resistance and decreasing airflow.
B.
increases elasticity, thereby decreasing resistance and increasing airflow.
C.
decreases elasticity, thereby increasing resistance and decreasing airflow.
D.
decreases elasticity, thereby decreasing both resistance and airflow.
Question #16
Tracheal cartilages provide for ________ on the ________ aspect of the trachea.
A.
flexibility; posterior
B.
flexibility; anterior
C.
rigidity; posterior
D.
rigidity; anterior
Question #17
The bronchial circulation is a component of the pulmonary circulation.
A.
TRUE
B.
FALSE
Question #18
The carotid bodies contain ________ chemoreceptors that respond to changes in ________.
A.
central; blood concentrations of H+, but not CO2 and O2
B.
peripheral; blood concentrations of H+ and O2
C.
peripheral; concentrations of carbon, dust, and pollution in the lungs
D.
peripheral; cerebrospinal fluid concentrations of H+
E.
central; cerebrospinal concentrations of CO2
Question #19
Where would you find the trachealis muscle?
A.
Between the esophagus and the diaphragm
B.
Superior to the larynx
C.
Between the trachea and the diaphragm
D.
Between the larynx and the pharynx
E.
Between the esophagus and the trachea
Question #20
Air flows out of the body during expiration because
A.
atmospheric pressure is greater than intrapulmonary pressure.
B.
intrapulmonary pressure is greater than atmospheric pressure.
C.
intrapleural pressure is greater than intrapulmonary pressure.
D.
intrapleural pressure is greater than atmospheric pressure.
Question #21
Which is not correct about the left lung?
A.
It is slightly smaller than the right lung.
B.
It has a cardiac impression.
C.
It has an esophageal depression.
D.
It has a cardiac notch.
E.
It has 2 lobes and 1 fissure.
Question #22
Histamine release results in increased airway resistance and decreased airflow.
A.
FALSE
B.
TRUE
Question #23
During expiration, relaxation of the diaphragm and external intercostals
A.
stimulates the phrenic nerve.
B.
expands the rib cage.
C.
increases the pressure in the thoracic cavity.
D.
flattens the floor of the thoracic cavity.
E.
increases the volume of the thoracic cavity.
Question #24
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 large surface area and minimal thickness.
C.
its hearty thickness and the presence of oxygen transport pumps.
D.
its thinness, high water content, and scarcity of capillaries.
Question #25
What structure connects the larynx to the primary bronchi?
A.
Pharynx
B.
Trachea
C.
Alveolar ducts
D.
Esophagus
E.
Bronchioles
Question #26
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.
inactive precursor to a nonspecific enzyme that is synthesized in the pancreas and released in the small intestine.
D.
active enzyme that digests proteins within the small intestine.
Question #27
Villi
A.
are found throughout the gastrointestinal tract, generate movement of materials in the large intestine, increase surface area in the small intestine, and contain both smooth and skeletal muscle fibers.
B.
are found throughout the gastrointestinal tract.
C.
generate movement of materials in the large intestine.
D.
increase surface area in the small intestine.
E.
contain both smooth and skeletal muscle fibers.
Question #28
An increased secretion of watery saliva will result when the
A.
salivary nuclei of the brainstem activate parasympathetic pathways to salivary glands.
B.
salivary nuclei of the cerebrum activate sympathetic pathways to salivary glands.
C.
basal nuclei of the cerebrum activate somatic pathways to salivary glands.
D.
glossopharyngeal nuclei of the pons activate somatic and sympathetic pathways to the salivary glands.
E.
basal nuclei of the brainstem activate sympathetic pathways to salivary glands.
Question #29
Which duct transports bile to and from the gallbladder?
A.
Pancreatic duct
B.
Common bile duct
C.
Hepatic duct
D.
Cystic duct
E.
Hepatopancreatic duct
Question #30
Which is (are) not found in the wall of the large intestine?
A.
Lymphatic nodules
B.
Goblet cells
C.
Villi
D.
Simple columnar epithelium
E.
Intestinal glands
Question #31
The enzyme pepsin becomes active when pH is
A.
low.
B.
high.
Question #32
Which is the layer of the serous membrane that directly covers the surface of internal organs?
A.
Parietal peritoneum
B.
Visceral peritoneum
C.
Rectal peritoneum
D.
Omental layer
E.
Muscularis mucosa
Question #33
Which of the following is considered to be one of the primary digestive system hormones?
A.
Hydrochloric acid
B.
Gastrin
C.
Bile
D.
Pancreatic amylase
Question #34
The projections on the superior surface of the tongue, some of which house taste buds, are the
A.
cilia.
B.
rugae.
C.
papillae.
D.
glossal spines.
E.
tonsils.
Question #35
Stenosis (constriction) of the pyloric sphincter would interfere with
A.
passage of bile and pancreatic juice into the duodenum.
B.
passage of chyme into the duodenum.
C.
mucus secretion.
D.
passage of a bolus into the stomach.
E.
peristalsis.
Question #36
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.
organ of mastication.
B.
chemically digesting organ.
C.
accessory digestive organ.
D.
alimentary canal organ.
E.
diffuse ingestive structure.
Question #37
Late one night, while studying for your anatomy class, you open a box of saltine crackers to do a little snacking. After chewing on a starchy morsel for a few minutes, you begin to notice a sweet taste in your mouth. What accounts for this?
A.
Activity of bacteria in the mouth lowers the pH
B.
Phagocytosis by the pharyngeal tonsils produces by-products that taste sweet
C.
Salivary amylase activity
D.
Esophageal reflux
E.
"Sweet" taste receptors are slower to respond than others
Question #38
Duodenal glands (Brunner glands) that secrete a viscous mucus into the small intestine are located in the
A.
mucosa.
B.
submucosa.
C.
muscularis interna.
D.
adventitia.
E.
serosa.
Question #39
The ________ are considered the opening from the oral cavity to the oropharynx.
A.
conchae
B.
fauces
C.
choana
D.
glossus
E.
fossae
Question #40
The central cavity of a tooth is filled with
A.
cementum.
B.
dentin.
C.
calcium phosphate.
D.
enamel.
E.
pulp.
Question #41
Which peritoneal fold attaches the liver to the anterior internal body wall?
A.
Mesentery proper
B.
Intraperitoneal ligament
C.
Hepatic ligament
D.
Coronary ligament
E.
Falciform ligament
Question #42
The initial site of both mechanical and chemical digestion is the
A.
small intestine.
B.
esophagus.
C.
stomach.
D.
oral cavity.
E.
pharynx.
Question #43
The term "retroperitoneal" may be used to describe the location of certain abdominal organs. This means that such organs are located
A.
between folds of the parietal peritoneum.
B.
posterior to the parietal peritoneum.
C.
deep to the visceral peritoneum.
D.
between the visceral and parietal layers of the peritoneum.
E.
in the peritoneal cavity.
Question #44
Which organ is not considered an accessory digestive organ?
A.
Tongue
B.
Pharynx
C.
Pancreas
D.
Salivary glands
E.
Teeth
Question #45
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.
chemoreceptors.
B.
mechanoreceptors.
C.
bilireceptors.
D.
omental neurons
E.
osmodetectors.
Question #46
Carboxypeptidase is an enzyme that helps digest
A.
amino acids within the stomach.
B.
disaccharides within the duodenum.
C.
complex carbohydrates within the small intestine.
D.
peptides within the small intestine.
E.
starch within the stomach.
Question #47
The presence of fatty chyme in the small intestine stimulates it to release ________, which causes the ________.
A.
CCK; stomach to increase gastric secretion
B.
secretin; pancreas to release acidic pancreatic juice
C.
CCK; gallbladder to release bile
D.
secretin; stomach to increase motility
E.
gastrin; liver to secrete an alkaline solution
Question #48
Vitamin K and B vitamins produced by bacteria of the large intestine are absorbed into the blood.
A.
FALSE
B.
TRUE
Question #49
What is the correct order for the list of structures of the large intestine, starting at the cecum and ending at the rectum? a: Left colic flexure b: Ascending colon c: Transverse colon d: Right colic flexure e: Sigmoid colon f: Descending colon
A.
b, d, c, a, f, e
B.
f, c, d, e, a, b
C.
b, a, c, d, f, e
D.
e, b, a, c, d, f
E.
e, b, d, c, a, f
Question #50
Gastric mixing changes
A.
foodstuffs into bile.
B.
food into chyle.
C.
a bolus into chyme.
D.
proteins into lipids.
E.
chyle into pepsin.
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