4 phases of respiration correct answers 1. Pulmonary ventilation
2. External gas exchange
3. Gas transport in the blood
4. Internal gas exchange
Respiration correct answers Inhalation and exhalation of air. The process by which O2 is
obtained from the environment and delivered to the cells.
Structures of the Respiratory System correct answers Nasal cavity,Pharynx, Larynx, Trachea,
Bronchi, Alveoli
pulmonary ventilation correct answers movement of air into and out of the lungs/exchange of air
between the atmosphere and the air sacs (Alveoli)
External gas exchange correct answers occurs in the lungs as oxygen diffuses from the air sacs
into the blood and carbon dioxide diffuses out of the blood to be eliminated
Gas transport in the blood correct answers The circulating blood carries gases between the lungs
and the tissues, supplying oxygen to the cells and bringing back carbon dioxide.
Internal gas exchange correct answers occurs in the tissues as oxygen diffuses from the blood to
the cells, whereas carbon dioxide travels from the cells into the blood
compliance correct answers The ease with which one can expand the lungs and thorax
Diffusion correct answers Movement of molecules from an area of higher concentration to an
area of lower concentration/concentration gradient
, two phases of ventilation correct answers inhalation and exhalation
Surfactant correct answers chemical produced in the lungs to maintain the surface tension of the
alveoli and keep them from collapsing
Difference between the left and right bronchi correct answers right bronchi is larger and extends
more vertically. (this is where a foreign object will most likely lodge)
hypoventilation correct answers causes increased CO2/H+ in blood & acidosis
Hyperventilation correct answers causes decreased CO2/H+ in blood and Alkalosis
Part of the brain controls the HR and Resp correct answers Medulla/Brainstem
What is the process that controls respiration correct answers The brain senses arterial levels of
H+, sends signals to the phrenic nerve to stimulate the diaphragm to increases respiration to
remove excess CO2 and H+
Hydrogens role in respiration correct answers Hydrogen stimulates the central chemoreceptors in
the brain stem to either increase or decrease the rate and Depth of breathing
superior vena cava correct answers #4
right ventricle correct answers #2
right atrium correct answers #3
left ventricle correct answers #9