Respiratory System, Digestive System, &
Nutrition/Metabolism) Questions With Complete Solutions
Which of the following is responsible for holding the lungs to
the thorax wall?
surface tension from pleural fluid and negative pressure in the
pleural cavity
The erythrocyte (red blood cell) count increases after a while
when an individual goes from a low to a high altitude because
the ________.
concentration of oxygen and/or total atmospheric pressure is
lower at high altitudes
Most inspired particles such as dust fail to reach the lungs
because of the ________.
ciliated mucous lining in the nose
Which of the following is INCORRECT?
Pressure gradient equals gas flow over resistance.
Select the correct statement about the physical factors
influencing pulmonary ventilation.
As alveolar surface tension increases, additional muscle action
will be required.
Select the correct statement about oxygen transport in blood.
,A 50% oxygen saturation level of blood returning to the lungs
might indicate an activity level higher than
normal.
Which of the disorders below is characterized by destruction of
the walls of the alveoli producing abnormally large air spaces
that remain filled with air during exhalation?
emphysema
Which of the following does NOT influence hemoglobin
saturation?
nitric oxide
For inspiration of air, which of the following happens first?
diaphragm descends, thoracic volume begins to increase, and rib
cage rises
Spirometry results reveal a vital capacity of two liters which is
well below the predicted value of five liters. This suggests
which disorder?
restrictive disease
Which law describes the relationship between the pressure and
volume of a gas?
Boyle's law
The Bohr effect refers to the unloading of ________ in a RBC
due to declining blood pH.
oxygen
Which structure is lined with simple squamous epithelium?
,alveolus
Using spirometry, a patient discovers their forced expiratory
volume (FEV) after the first second is 40%. What does this
suggest?
restrictive disease
Which of the following anchor(s) the vocal folds?
arytenoid cartilages
Which of the following is a conducting zone structure?
terminal bronchiole
Wavelike smooth muscle contractions that move foodstuffs
through the alimentary tube.
peristalsis
Chemical or mechanical process of breaking down foodstuffs
into simpler units.
digestion
The enzymatic breakdown of any type of food molecule is called
________.
hydrolysis
Process by which simpler chemical units pass through the lumen
of the gastrointestinal tract into the blood or lymph.
absorption
Increases output of enzymatic - rich pancreatic juice.
CCK
, Increases output of pancreatic juice rich in bicarbonate atoms
secretin
Increases HCl secretion and stimulates contraction of intestinal
muscle.
gastrin
Stimulates insulin release and mildly inhibits HCl production
gastric inhibitory peptide
The ____________ of the small intestine enhance absorption by
causing the chyme to spiral, rather than to move in a straight
line, as it passes through the small intestine.
circular folds
_______________ is an example of smooth muscle plasticity.
Gastric accommodation
Food often contains bacteria, but the ____________ is effective
in killing most ingested microbes.
HCl of the stomach
The major role of absorption in the __________ is to reclaim
bile salts to be recycled back to the liver.
ileum
The _____________ is the most extensive serous membrane in
the body.
peritoneum