VPHY 3100 Exam 4 questions & answers
A+ already passed
What are the functions of the Respiratory System? - correct answer
✔✔Ventilation
Gas Exchange
O2 utilization and CO2 production
Ventilation - correct answer ✔✔(Breathing) To move air into and out of
respiratory system
Gas Exchange: External Respiration - correct answer ✔✔Gas exchange between
air and capillaries in the lungs.
Gas Exchange: Internal Respiration - correct answer ✔✔Gas exchange between
systematic capillaries and tissues of the body
What generates Diffusion? - correct answer ✔✔pressure gradients
O2 utilization and CO2 production by the tissues - correct answer ✔✔cellular
respiration
Zones of Airway passages - correct answer ✔✔Conducting zone and respiratory
zone
,Conducting Zone - correct answer ✔✔Passage of Air
Outside the lungs: Nasal passages to epiglottis to larynx (glottis)
Inside the Lungs: trachea to bronchus (2 branches) to bronchiole to terminal
bronchiole
respiratory zone - correct answer ✔✔Gas exchange: respiratory bronchioles to
alveolar ducts to alveolar sacs
What happens to individual airway cross sectional area, diameter, and length as
you go deeper into the lungs? - correct answer ✔✔Diameter and length decrease
(trachea largest diameter and length) Area and number increase deeper into the
lungs
Functions of Conducting Zone - correct answer ✔✔passage of air, warming,
humidification, filtration, and immune surveillance
What is the source of water vapor? - correct answer ✔✔Air becomes water vapor
in airway, water coming from internal body and become vapor which travels and
diffuses through membrane.
Role of Mucociliary apparatus - correct answer ✔✔Removal of particulates
Functions of Respiratory Zone - correct answer ✔✔passage of air,
gas exchange,
,immune surveillance
Alveoli - correct answer ✔✔The site for gas exchange
Total number: ~300x10^6
~0.25-0.5mm in diameter
~Total Area: 60-80m^2
Fluid helps - correct answer ✔✔Lungs stick to ribs
The lungs naturally want to __. - correct answer ✔✔to collapse
Chest wall wants to - correct answer ✔✔to expand
Alveolar Wall - correct answer ✔✔a layer of type I and type II alveolar cells
Type I alveolar cells - correct answer ✔✔the major lining cells, accounts for 95-
97% of total surface area
Type II alveolar cells - correct answer ✔✔produce surfactant
air-blood barrier - correct answer ✔✔~0.3 micrometers
Very Thin Diffusion Barrier for Gas Exchange - correct answer ✔✔Layers of
respiratory membrane:
, 1. Fluid Layer with surfactant
2. Type I alveolar cell membranes
3. Narrow interstitial space
4. Capillary endothelial cell membranes
thoracic cavity - correct answer ✔✔Surrounded by rib cage (chest wall) and the
respiratory muscles
Pleural (intra-pleural) space - correct answer ✔✔Thin fluid layer between visceral
pleura covering the lungs (visceral) and parietal pleura lining the thoracic cavity
walls
Air-free potential space, lungs cling to inside of thorax
Diaphragm - correct answer ✔✔muscle between thoracic and abdominal cavities
Quiet Inspiration - correct answer ✔✔active process requiring energy- 1.
diaphragm contracts which increase thoracic volume vertically
2. parasternal and external intercostal muscles (between ribs) contract-raising the
ribs which increase thoracic volume laterally.
Quiet Expiration - correct answer ✔✔passive process, relaxation of inspiratory
muscles
A+ already passed
What are the functions of the Respiratory System? - correct answer
✔✔Ventilation
Gas Exchange
O2 utilization and CO2 production
Ventilation - correct answer ✔✔(Breathing) To move air into and out of
respiratory system
Gas Exchange: External Respiration - correct answer ✔✔Gas exchange between
air and capillaries in the lungs.
Gas Exchange: Internal Respiration - correct answer ✔✔Gas exchange between
systematic capillaries and tissues of the body
What generates Diffusion? - correct answer ✔✔pressure gradients
O2 utilization and CO2 production by the tissues - correct answer ✔✔cellular
respiration
Zones of Airway passages - correct answer ✔✔Conducting zone and respiratory
zone
,Conducting Zone - correct answer ✔✔Passage of Air
Outside the lungs: Nasal passages to epiglottis to larynx (glottis)
Inside the Lungs: trachea to bronchus (2 branches) to bronchiole to terminal
bronchiole
respiratory zone - correct answer ✔✔Gas exchange: respiratory bronchioles to
alveolar ducts to alveolar sacs
What happens to individual airway cross sectional area, diameter, and length as
you go deeper into the lungs? - correct answer ✔✔Diameter and length decrease
(trachea largest diameter and length) Area and number increase deeper into the
lungs
Functions of Conducting Zone - correct answer ✔✔passage of air, warming,
humidification, filtration, and immune surveillance
What is the source of water vapor? - correct answer ✔✔Air becomes water vapor
in airway, water coming from internal body and become vapor which travels and
diffuses through membrane.
Role of Mucociliary apparatus - correct answer ✔✔Removal of particulates
Functions of Respiratory Zone - correct answer ✔✔passage of air,
gas exchange,
,immune surveillance
Alveoli - correct answer ✔✔The site for gas exchange
Total number: ~300x10^6
~0.25-0.5mm in diameter
~Total Area: 60-80m^2
Fluid helps - correct answer ✔✔Lungs stick to ribs
The lungs naturally want to __. - correct answer ✔✔to collapse
Chest wall wants to - correct answer ✔✔to expand
Alveolar Wall - correct answer ✔✔a layer of type I and type II alveolar cells
Type I alveolar cells - correct answer ✔✔the major lining cells, accounts for 95-
97% of total surface area
Type II alveolar cells - correct answer ✔✔produce surfactant
air-blood barrier - correct answer ✔✔~0.3 micrometers
Very Thin Diffusion Barrier for Gas Exchange - correct answer ✔✔Layers of
respiratory membrane:
, 1. Fluid Layer with surfactant
2. Type I alveolar cell membranes
3. Narrow interstitial space
4. Capillary endothelial cell membranes
thoracic cavity - correct answer ✔✔Surrounded by rib cage (chest wall) and the
respiratory muscles
Pleural (intra-pleural) space - correct answer ✔✔Thin fluid layer between visceral
pleura covering the lungs (visceral) and parietal pleura lining the thoracic cavity
walls
Air-free potential space, lungs cling to inside of thorax
Diaphragm - correct answer ✔✔muscle between thoracic and abdominal cavities
Quiet Inspiration - correct answer ✔✔active process requiring energy- 1.
diaphragm contracts which increase thoracic volume vertically
2. parasternal and external intercostal muscles (between ribs) contract-raising the
ribs which increase thoracic volume laterally.
Quiet Expiration - correct answer ✔✔passive process, relaxation of inspiratory
muscles
