Biology Questions and Answers
- What is hemoglobin F?
Why does the fetus need a
different hemoglobin?
Hemoglobin F is the in the mammalian fethemoglobin foundus and hemoglobin (^)
A is the normal heHemoglobin F has hmoglobin.igher affinity f (^) or
oxygen.
The fetus needs hemoglobin capaextracting oxygen from the mother’sble of
circulation. Themoglobin F since herefore the fetus usit has higher affinityes (^)
for oxygen than hemoglobin. the mother’s
- In high altitudes is it
necessary for the blood to
have more or less
hemoglobin?
In high altitudes the air is rarefied and
oxygen concentration is lowlow altitudes. In this situation ther than e in
efficiency of the respiratory systemmust be greater and thus the organism (^)
synthesizes more hemoglobin (and
more red blood cells) trying to get moreoxygen. This phenomenon is known as
compensatory hyperglobulinemia.
The compensatory hythe reason why athletes tperglobulinemia ishat will
compete in high altitudes nin the place some days before the eventeed to arrive (^)
so there is time for their body to make
more red blood cells and they will bless affected by the effects of the lowe (^)
atmospheric oxygen concentration
(fatigue, reduced muscular strength).
- What is the substance that
stimulates the production of
red blood cells? Which is the
organ that secretes it? Under
what conditions does this
secretion increase?
The substance that stimulates the
production obone marrow is erythropoietin.f red blood cells by the
Erythropoietin is a hormone secreted by
the kidneys. Iwhen there is deficient tissuets secretion is increased
oxygenation (tissue heither by reduced oxygen availabilityypoxia) caused (^) (as
it occurs in high altitudes) or by internal
diseases, as in pulmonary diseases.
- Why is carbon monoxide
toxic for humans?
Hemoglobin “likes”(CO) much more than it likes oxy carbon monoxidegen. (^)
When there is carbon monoxide in the
inhaled air it biforming carboxynds to hhemoglobin byemoglobin
occupying the binding site where
oxygen would bind. Due to the higherhemoglobin affinity for carbon monoxide (^)
thus (e.g., in intoxication from car
exhausts)and the individual undergoes hypoxia, there is no oxygen transport
loses conscience, inhales more carbon
monoxide and may even die.
Intoxication by carbon monoxide is an
important cause oclosed garages. f death in fires and in
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