The epithelium lining the stomach, small intestine, and most of the large intestine is simple columnar; the epithelium in the oral cavity, esophagus, and pharynx is stratified squamous. Are these two statements true or false?
a) The first statement is false; the second is true.
b) Both statements are false.
c) The first statement is true; the second is false.
d) Both statements are true.

D. Both statements are true.

Explanation:

Simple columnar epithelium has just a layer which lines the digestive parts such as the stomach ,small intestine and large intestine.

The stratified squamous epithelium also has a single layer but with a flat surface.It lines the oral cavity.This structure is most suitable for movement of particles through the surface which could be through diffusion or filtration.

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explanation:

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hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.