Biology 20 Alberta: The Respiratory
System Final Exam Questions Fully
Solved.
Why do we need oxygen - Answer For cellular respiration (provides energy for cellular
metabolism)
Carbon Dioxide - Answer A by-product of cellular respiration and is not used by our cells
(waste)
What is the function of the respiratory system - Answer To take in oxygen and release carbon
dioxide to the environment
What are the two main requirements for respiration to take place - Answer Large surface area
(for a maximal oxygen and carbon dioxide exchange rate) and a moist environment (to dissolve
oxygen and carbon dioxide)
Why is large surface area required for respiration - Answer For a maximal oxygen and carbon
dioxide exchange rate
Why is a moist environment required for respiration - Answer To dissolve oxygen and carbon
dioxide
What are the stages of respiration - Answer Breathing (inspiration/inhaling and
expiration/exhaling), external respiration (exchange of gases between air and blood), internal
respiration (exchange of gases between blood and body tissues), and cellular respiration (energy
releasing chemical reactions that take place within the cell)
Breathing - Answer Inspiration (inhaling) and expiration (exhaling)
Inspiration - Answer Inhaling
Expiration - Answer Exhaling
, Cellular Respiration - Answer Energy releasing chemical reactions that take place within the
cell
What is the respiratory tract - Answer The passageway that moves air from external
environment to respiratory surface
What are the lungs protected by - Answer Bone and muscle of thoracic cavity
Upper Respiratory Tract - Answer Nasal passages, pharynx, epiglottis, glottis, larynx, and
trachea
Nasal Passages - Answer Serve to warm, moisten, and clean incoming air via mucous and cilia
(leading to coughing and sneezing)
Pharynx - Answer Throat. Passage way for air and food/liquids
Epiglottis - Answer Flap of cartilage behind tongue. Covers opening to trachea during
eating/drinking
Glottis - Answer Opening to trachea
Larynx - Answer Voice box. Made of cartilage and contains vocal cords; air passes through to
create sound
Trachea - Answer Wind pipe. Semicircular (C rings), cartilage arches prevent collapsing
Lower Respiratory Tract - Answer Bronchi, bronchioles, and alveoli
Bronchi - Answer Branches from trachea that enter the left and right lung; have cartilage rings.
Also have cilia and mucous producing cells
Bronchioles - Answer Smaller branches within each lung; no cartilage rings. Also have cilia and
mucous producing cells
System Final Exam Questions Fully
Solved.
Why do we need oxygen - Answer For cellular respiration (provides energy for cellular
metabolism)
Carbon Dioxide - Answer A by-product of cellular respiration and is not used by our cells
(waste)
What is the function of the respiratory system - Answer To take in oxygen and release carbon
dioxide to the environment
What are the two main requirements for respiration to take place - Answer Large surface area
(for a maximal oxygen and carbon dioxide exchange rate) and a moist environment (to dissolve
oxygen and carbon dioxide)
Why is large surface area required for respiration - Answer For a maximal oxygen and carbon
dioxide exchange rate
Why is a moist environment required for respiration - Answer To dissolve oxygen and carbon
dioxide
What are the stages of respiration - Answer Breathing (inspiration/inhaling and
expiration/exhaling), external respiration (exchange of gases between air and blood), internal
respiration (exchange of gases between blood and body tissues), and cellular respiration (energy
releasing chemical reactions that take place within the cell)
Breathing - Answer Inspiration (inhaling) and expiration (exhaling)
Inspiration - Answer Inhaling
Expiration - Answer Exhaling
, Cellular Respiration - Answer Energy releasing chemical reactions that take place within the
cell
What is the respiratory tract - Answer The passageway that moves air from external
environment to respiratory surface
What are the lungs protected by - Answer Bone and muscle of thoracic cavity
Upper Respiratory Tract - Answer Nasal passages, pharynx, epiglottis, glottis, larynx, and
trachea
Nasal Passages - Answer Serve to warm, moisten, and clean incoming air via mucous and cilia
(leading to coughing and sneezing)
Pharynx - Answer Throat. Passage way for air and food/liquids
Epiglottis - Answer Flap of cartilage behind tongue. Covers opening to trachea during
eating/drinking
Glottis - Answer Opening to trachea
Larynx - Answer Voice box. Made of cartilage and contains vocal cords; air passes through to
create sound
Trachea - Answer Wind pipe. Semicircular (C rings), cartilage arches prevent collapsing
Lower Respiratory Tract - Answer Bronchi, bronchioles, and alveoli
Bronchi - Answer Branches from trachea that enter the left and right lung; have cartilage rings.
Also have cilia and mucous producing cells
Bronchioles - Answer Smaller branches within each lung; no cartilage rings. Also have cilia and
mucous producing cells
