3.
the model shows stem cells and the many differen
ells and the many different types of cells they may become.
stem cells
cardiac cells
muscle cells
soo
intestinal cells
blood cells
liver cells
nerve cells
which statement describes the stem cells and how they become new types of cells?
a
b
they are embryonic stem cells that differentiate based on the expression of specific genes
and the influence of external chemical signals.
they are adult stem cells that replicate based on the expression of specific genes and the
influence of external chemical signals.
they are embryonic stem cells that differentiate into cell types similar to their tissue of origin
when their dna mutates.
they are adult stem cells that replicate into cell types similar to their tissue of origin when
their dna mutates.
c
d

yes it is weird but true

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.