<span>Els moduladors al·lostèrics que actuen en els humans són el 2,3-Bisfosfoglicerat (2-3-BPG),el CO2
i els H+
. El 2,3-BPG s'uneix al centre del tetrà mer de l'estat T i aixà l'estabilitzà launió per interaccions iòniques. Els protons actuen perquè quan el pH és baix l'hemoglobinadisminueix la seva afinitat per l'oxigen (efecte Bohr). L'augment de la concentració del CO2
té el mateix efecte perquè el CO2 es combina en H2O i es dissocia en HCO3-i H+
i per aixòdisminueix l'afinitat de l'hemoglobina perquè augmenta la concentració de protons</span>
The answer is A because that’s the only thing plants “breath”
A.
Tight junctions are <u>cell junctions in areas that are subjected to great mechanical stress, such as the skin and heart muscles</u>
Explanation:
They are also called <u>exclusion junctions</u>. This is because they form very tight junctions between adjacent cells such that only very small molecules, like ions, can pass in between the intercellular spaces of the cells. This is why they are found in regions where very little leakage is needed such as the heart -where blood could leak out during pumping- or the skin where foreign material cannot be allowed into the body.
They are also favorable in high stress regions because they bound cells together giving them structural integrity because they limit the movement of cells and their membrane intergral proteins.
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Sporozoa are non motile organisms.
<h3>What do you mean by sporozoa and why they are non motile?</h3>
Sporozoa are parasitic non motile protozoa that have a complex life cycle usually involving both sexual and asexual generation often in different hosts and includes important pathogens. Sporozoans do not have flagella or cillia for locomotion . They depend on twisting and bending on move.
Sporozoa do not have flagella or cillia for locomotion. So, they are non motile .
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