The mucous blanket:
a. only covers the nose and throat
b. traps dust, pollen, and other contaminants
c. only covers the alveoli and bronchioles
d. both B and C above
b. traps dust, pollen, and other contaminants
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Most vertebrae have a heart-shaped body and a long spinous process that is angled inferiorly.
a. cervical b. thoracic c. lumbar d. sacral
During ionization, water molecules disrupt the ionic bonds of a salt to produce a mixture of ions. These ions can carry a current and so are called
A) cations. B) anions. C) acids. D) electrolytes. E) counter ions.
A normal, relaxed inhalation carries about ________ of the inhaled air to the olfactory organs
A) 50 percent B) 8 percent C) 2 percent D) 35 percent E) 10 percent
The pacemaker of the heart is normally which structure?
a. atrioventricular (AV) node b. sinoatrial (SA) node c. mitral valve d. bundle of His e. left ventricle