BIO 163 EXAM SCRIPT 2025/2026 QUESTIONS AND
SOLUTIONS RANKED A+
✔✔about the same - ✔✔At the end of inspiration the pressure in the airways is _____
as the pressure outside of the thoracic wall.
✔✔decreases - ✔✔As air pressure _________ within the lungs, air flow into the lungs
will increase.
✔✔Air flows into the lungs and alveoli - ✔✔What effect does contraction of the
diaphragm have on airflow through the airways of the lungs?
✔✔Lung tissue adheres to the thoracic wall due to the pleural fluid and pleural
membranes; when the thoracic wall moves, the lungs are pulled along. - ✔✔Why do the
lungs expand as the rib cage lifts and the diaphragm contracts?
✔✔higher; lower - ✔✔Air will flow from an area of _____ pressure to an area of _____
pressure.
✔✔atmospheric pressure - ✔✔When we inhale, the _______ drive(s) air into our lungs.
✔✔Air pressures inside and outside of the lungs are equal - ✔✔Describe air pressures
at the end of expiration (the pause between breaths).
✔✔increases - ✔✔As the size of a pressure gradient increases, the amount of air flow
______.
✔✔From area of high pressure to area of low pressure - ✔✔In which direction will air
flow?
✔✔atmospheric or atmosphere - ✔✔The pressure of the air around us, called
the______ pressure, moves air into the lungs during inspiration.
✔✔Decreases intra-alveolar pressure - ✔✔What effect does contraction of the
diaphragm have on intra-alveolar pressure?
✔✔active; passive
Reason:
Quiet inspiration requires contraction of the diaphragm while expiration occurs due to
relaxation of the diaphragm and recoil of lung tissue. - ✔✔During quiet breathing,
inspiration is ______ and expiration is ______.
, ✔✔higher; lower - ✔✔Air will flow from an area of _____ pressure to an area of _____
pressure.
✔✔This statement is true. A respiratory cycle includes one inspiration followed by one
expiration. - ✔✔True or false: A respiratory cycle includes the combination of one
inspiration and one expiration.
✔✔Increases thoracic cavity volume - ✔✔What effect does contraction of the diaphragm
have on thoracic cavity volume?
✔✔Air pressures inside and outside of the lungs are equal - ✔✔Describe air pressures
at the end of expiration (the pause between breaths).
✔✔Tidal volume (TV) - ✔✔Name the respiratory volume that is defined as the amount
of air moved in, then out, during a single respiratory cycle.
✔✔Contraction of diaphragm - ✔✔Which action would decrease intra-alveolar
pressure?
✔✔passive
Reason:
Active muscle contraction is not necessary for quiet expiration. Relaxation of inspiratory
muscles, lung recoil and surface tension result in passive expiration. - ✔✔During quiet
breathing, expiration is a ______ process, since it relies on the recoil of elastic tissues
to change thoracic cavity volume.
✔✔500 mL - ✔✔What is the adult value for resting tidal volume?
✔✔Respiratory cycle - ✔✔What is the term used to describe the combination of one
inspiration plus the following expiration?
✔✔A Tidal volume
B Residual volume
C Expiratory reserve volume
D Inspiratory reserve volume - ✔✔
✔✔Tidal - ✔✔____________volume is the amount of air that moves in during a single
respiratory cycle.
✔✔Decreases intra-alveolar pressure - ✔✔What effect does contraction of the
diaphragm have on intra-alveolar pressure?
SOLUTIONS RANKED A+
✔✔about the same - ✔✔At the end of inspiration the pressure in the airways is _____
as the pressure outside of the thoracic wall.
✔✔decreases - ✔✔As air pressure _________ within the lungs, air flow into the lungs
will increase.
✔✔Air flows into the lungs and alveoli - ✔✔What effect does contraction of the
diaphragm have on airflow through the airways of the lungs?
✔✔Lung tissue adheres to the thoracic wall due to the pleural fluid and pleural
membranes; when the thoracic wall moves, the lungs are pulled along. - ✔✔Why do the
lungs expand as the rib cage lifts and the diaphragm contracts?
✔✔higher; lower - ✔✔Air will flow from an area of _____ pressure to an area of _____
pressure.
✔✔atmospheric pressure - ✔✔When we inhale, the _______ drive(s) air into our lungs.
✔✔Air pressures inside and outside of the lungs are equal - ✔✔Describe air pressures
at the end of expiration (the pause between breaths).
✔✔increases - ✔✔As the size of a pressure gradient increases, the amount of air flow
______.
✔✔From area of high pressure to area of low pressure - ✔✔In which direction will air
flow?
✔✔atmospheric or atmosphere - ✔✔The pressure of the air around us, called
the______ pressure, moves air into the lungs during inspiration.
✔✔Decreases intra-alveolar pressure - ✔✔What effect does contraction of the
diaphragm have on intra-alveolar pressure?
✔✔active; passive
Reason:
Quiet inspiration requires contraction of the diaphragm while expiration occurs due to
relaxation of the diaphragm and recoil of lung tissue. - ✔✔During quiet breathing,
inspiration is ______ and expiration is ______.
, ✔✔higher; lower - ✔✔Air will flow from an area of _____ pressure to an area of _____
pressure.
✔✔This statement is true. A respiratory cycle includes one inspiration followed by one
expiration. - ✔✔True or false: A respiratory cycle includes the combination of one
inspiration and one expiration.
✔✔Increases thoracic cavity volume - ✔✔What effect does contraction of the diaphragm
have on thoracic cavity volume?
✔✔Air pressures inside and outside of the lungs are equal - ✔✔Describe air pressures
at the end of expiration (the pause between breaths).
✔✔Tidal volume (TV) - ✔✔Name the respiratory volume that is defined as the amount
of air moved in, then out, during a single respiratory cycle.
✔✔Contraction of diaphragm - ✔✔Which action would decrease intra-alveolar
pressure?
✔✔passive
Reason:
Active muscle contraction is not necessary for quiet expiration. Relaxation of inspiratory
muscles, lung recoil and surface tension result in passive expiration. - ✔✔During quiet
breathing, expiration is a ______ process, since it relies on the recoil of elastic tissues
to change thoracic cavity volume.
✔✔500 mL - ✔✔What is the adult value for resting tidal volume?
✔✔Respiratory cycle - ✔✔What is the term used to describe the combination of one
inspiration plus the following expiration?
✔✔A Tidal volume
B Residual volume
C Expiratory reserve volume
D Inspiratory reserve volume - ✔✔
✔✔Tidal - ✔✔____________volume is the amount of air that moves in during a single
respiratory cycle.
✔✔Decreases intra-alveolar pressure - ✔✔What effect does contraction of the
diaphragm have on intra-alveolar pressure?
