Test 3 Bio 242 Exam Questions With Certified Answers
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Course
Bio 242
Institution
Bio 242
Test 3 Bio 242 Exam Questions With Certified Answers
A digestive organ that is not part of the alimentary canal is the
a) oral cavity
b) liver
c) stomach
d) pharynx
e) small intestine - Answer-b) liver
/.A doctor consulting a patient that recently has had their gall bladder removed wo...
A digestive organ that is not part of the alimentary canal is the
a) oral cavity
b) liver
c) stomach
d) pharynx
e) small intestine - Answer-b) liver
/.A doctor consulting a patient that recently has had their gall bladder removed would
likely advise _______.
a) a low to no carb diet
b) fewer, but larger meals
c) eating foods that are low in fat
d) a low to no protein diet - Answer-c) eating foods that are low in fat
/.A drop in blood pH stimulates the chemoreceptors to send signals to the respiratory
center located in the medulla oblongata in order to increase the production of CO2
molecules from tissues and their release into the blood stream
a) true
b) false - Answer-b) false
/.Air moves into the lungs because
a) the gas pressure in the lungs is less than atmospheric pressure
b) the volume of the lungs decreases with inspiration
c) the thorax is muscular
d) contraction of the diaphragm decreases the volume of thoracic cavity
e) the respiratory control center initiates active squeezing of the alveoli - Answer-a) the
gas pressure in the lungs is less than atmospheric pressure
/.All but one of the following is a function of the low pH found in the stomach. Select the
description below that does not reflect a role of stomach acid.
a) stomach acid denatures proteins making the polypeptide chain more accessible to
pepsin digestive enzymes
b) many potentially harmful bacteria will be prevented entry to the small intestine by
stomach acid
c) the stomach's acid is needed to neutralize the alkalinity from esophagus
d) Low pH converts pepsinogen to its active form of pepsin, preventing the protease
enzyme from digesting the cells that produce it. - Answer-c) the stomach's acid is
needed to neutralize the alkalinity from esophagus
/.All of the following statements are correct EXCEPT
, a) the external intercostal muscles contract during inhalation
b) the diaphragm contracts but the external intercostal muscles relax during exhalation
c) the exhalation is a passive process and does not require ATP consumption
d) the inhalation is an active process and requires ATP consumption - Answer-b) the
diaphragm contracts but the external intercostal muscles relax during exhalation
/.All of the following statements are correct EXCEPT:
a) atmospheric pressure is more than the intrapulmonary pressure in inhalation
b) contractions of external intercostal muscles and diaphragm lead to a decrease in the
alveolar volume
c) exhalation is a passive process in a healthy lung
d) all are correct - Answer-b) contractions of external intercostal muscles and
diaphragm lead to a decrease in the alveolar volume
/.All of the following statements are true about the epiglottis EXCEPT
a) epiglottis is a cartilaginous flap at the entry of the larynx
b) it prevents food from going into the trachea and instead directs it to the esophagus
c) is a conic projection from the posterior edge of the middle of the soft palate,
composed of connective tissue
d) is covered with mucous membrane - Answer-c) is a conic projection from the
posterior edge of the middle of the soft palate, composed of connective tissue
/.Arrange the following structures in the correct order as air passes through them
traveling from bronchi:
1) alveolar duct 2) alveolus 3) bronchiole 4) terminal bronchiole
a) 2, 3, 4, 1
b) 3, 4, 1, 2
c) 3, 1, 2, 4
d) 4, 3, 1, 2 - Answer-b) 3, 4, 1, 2
/.Based on what you learned from oxygen-hemoglobin dissociation curve, a 70%
oxygen saturation level of the blood returning to the lungs might indicate a physical
activity level higher than normal
a) true
b) false - Answer-b) false
/.Chymotrypsinogen is secreted by
a) stomach
b) liver
c) large intestine
d) small intestine
e) pancreas - Answer-e) pancreas
/.Complete the following statement using the choices below. Air moves out of the lungs
when the pressure inside the lungs is
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