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WorksheetsChapter 15 Respiratory System
Total questions: 22
Worksheet time: 11mins
After entering the bloodstream, a CO2 molecule may be first converted to a molecule of _________.
carbonic acid
carbaminohemoglobin
carbon monoxide
carbonic anhydrase
At a given PO2, hemoglobin will release additional oxygen if ___________.
pH increases or temperature decreases
pH increases or temperature increases
pH decreases or temperature decreases
pH decreases or temperature increases
Which organ system integrates with the respiratory system because it contains the tonsils, which protect against infection at the entrance to the respiratory tract?
Integumentary system
Lymphatic system
Endocrine system
Muscular system
Which of the following body systems integrates with the respiratory system to secrete chemicals such as epinephrine and norepinephrine that stimulate respiratory activity and dilate respiratory passageways?
Lymphatic system
Endocrine system
Cardiovascular system
Nervous system
As the volume of the lungs increases, ____________.
both the DRG and VRG centers are inhibited
the DRG center is gradually inhibited, and the VRG expiratory center is stimulated
the DRG center is gradually stimulated, and the VRG center is inhibited
both the DRG and VRG centers are stimulated
During expiration, the departing _________ mixes with air in the __________.
nitrogen; alveoli
oxygen; alveolar sac
alveolar air; anatomic dead space
atmospheric air; trachea
When the PCO2 increases, the bronchioles ____; as a result, airflow is directed to lobules in which the PCO2 is ____.
constricts; low
dilate; high
constricts; high
dilate; low
Blood delivered by which of the following structures has a lower PO2 and a higher PCO2 than alveolar air?
Pulmonary veins
Pulmonary arteries
Alveolar capillaries
Pulmonary venules
In the center of heme units, oxygen molecules are bound to _________.
Sodium ions
Calcium ions
Chloride ions
Iron ions
In saturated exhaled air, which of the following gases has the highest partial pressure?
Carbon dioxide
Water vapor
Oxygen
Nitrogen
Which of the following organ systems protects portions of the upper respiratory tract and contains hairs that guard entry into the external nares?
Skeletal system
Muscular system
Integumentary system
Lymphatic system
Which organ system integrates with the respiratory system because it contains the tonsils, which protect against infection at the entrance to the respiratory tract?
Muscular system
Integumentary system
Lymphatic system
Endocrine system
Once in RBCs, some carbon dioxide molecules are bound to the "globin" portions of the hemoglobin molecule, forming ___________.
Carbon monoxide
Carbonic acid
Carbonic anhydrase
Carbaminohemoglobin
Which of the following statements is true?
Only the inflation reflex is involved in normal quiet breathing.
Only the deflation reflex is involved in normal quiet breathing.
Neither the inflation reflex nor the deflation reflex is involved in normal quiet breathing.
Both the inflation reflex and the deflation reflex are involved in normal quiet breathing.
All of the following statements concerning lung cancer are true except which choice?
Lung cancer is also called bronchopulmonary carcinoma.
Signs and symptoms usually appear long before tumors restrict airflow or compress nearby structures.
More people die of lung cancer in the United States than any other type of cancer.
Lung cancer typically originates in the bronchial passages or alveoli.
At birth, a newborn takes a first breath through powerful contractions of which muscles?
Serratus anterior and the diaphragm
The diaphragm and internal intercostals
The diaphragm and external intercostals
Pharyngeal constrictors and the diaphragm
In inhaled dry air, which gas has the highest partial pressure?
Oxygen
Nitrogen
Water vapor
Carbon dioxide
When a skeletal muscle is working during periods of maximal exertion, ___________.
body temperature rises, and local pH and PO2 decline
body temperature rises, and local pH and PO2 rise
body temperature declines, and local pH and PO2 decline
body temperature declines, and local pH and PO2 rise
Levels of which gas have a very powerful effect on the chemoreceptors in the carotid and aortic bodies?
Oxygen (O2)
Nitrogen (N2)
Hydrogen (H2)
Carbon dioxide (CO2)
Which of the following structures contains an inspiratory center involved in respiratory control?
The dorsal respiratory group (DRG) of the pons
The respiratory center of the pons
The ventral respiratory group (VRG) of the medulla oblongata
The dorsal respiratory group (DRG) of the medulla oblongata
Which of the following describes the diffusion gases between the blood and the interstitial fluid?
Both oxygen gas and carbon dioxide diffuse out of the capillaries.
Carbon dioxide gas diffuses out of the capillaries, and oxygen gas diffuses in.
Oxygen gas diffuses out of the capillaries, and carbon dioxide diffuses in.
Both oxygen gas and carbon dioxide diffuse into the capillaries.
Hering-Breuer reflexes are described as __________.
inflation and deflation reflexes together
inflation reflexes alone
normal and quiet breathing reflexes together
deflation reflexes alone
