Exam (elaborations)
BIOS 255 EXAM 3 2025 latest Graded
- Course
- BIOS 255
- Institution
- Chamberlain College Of Nursing
BIOS 255 EXAM 3 2025 latest Graded
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BIOS 255 EXAM 31. Functions of the Respiratory System:
-Gas exchange
-Communication
-Olfaction
-Acid-Base balance
-Blood pressure regulation
-Blood and lymph flow
-Platelet production
-Blood filtration
-Expulsion of abdominal contents
2. Describe high compliance as it relates to healthy functions.: -ease with
which the lungs and thoracic wall can be expanded
High compliance= easy expansion
Low compliance= resisted expansion
3. Describe IRDS ( Infant respiratory distress syndrome) and describe the
interventions that would be used to help a newborn premature baby
suffering from IRDS.: -leading cause of death in premature infants resulting
from lack of surfactant production in alveoli-treated with artificial surfactant until
they can make their own
4. Define antigens, epitopes and antibodies.: antigens: large molecule capable
of binding to an antibody or immune cells and triggering an immune response
epitopes: certain regions of an antigen molecule that stimulate immune
responses antibodies: reacts with an antigen and aids in protecting the body
from its harmful effects
5. Identify the PO2 measurements at the end of a normal inhalation (
breathing through the nose ) in each of the following:
Respiratory bronchiole
Alveolus
Nasal cavity
Trachea
Bronchus: Respiratory bronchiole: 104mm Hg
Alveolus: 104mm Hg
Nasal cavity: atmospheric @ 159mm Hg
Trachea: 104mm Hg
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, BIOS 255 EXAM 3
Bronchus: 104mm Hg
6. Describe the movement of O2 and CO2 in external and internal
respirations and define: internal: exchange of gases between blood in
systemic capillaries and tissue cells; blood loses O2 and gains CO2 external:
exchange of gases between the alveoli of the lungs and the blood in pulmonary
capillaries across the respiratory membrane; pulmonary capillary blood gains
O2 and loses CO2.
7. Pulmonary Ventilation: -breathing
-Inspiration (inhaling) & Expiration (exhaling) of air and involves the exchange of air
between the atmosphere and the alveoli of the lungs
8. Cellular Respiration: Process that releases energy by breaking down glucose
and other food molecules in the presence of oxygen
9. Effects of Temperature and pH on Oxygen dissociation curves
(Figure 22.26 (a) Figure 22.26(b)):
10. Macrophages: -Phagocytize tissue debris, dead neutrophils, bacteria, and
other foreign matter
-Process foreign matter and display antigenic fragments to certain T cells alerting
immune system to the presence of the enemy
11. T lymphocytes: directly attack and destroy diseased or foreign cells, and the
immune system remembers the antigens of those invaders and prevents them
from causing disease in the future
12. Natural killer cells: large lymphocytes that attack and destroy bacteria,
transplanted tissue, host cells infected with viruses or that have turned
cancerous
13. B lymphocytes: -produce humoral immunity
-Activated B cells develop into plasma cells
-Plasma cells secrete antibodies into the blood
-Circulating antibodies produce humoral immunity
-directly attack pathogens
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