the layer on the top. the layer with the most minerals.
The theme is the writer's view of or comment about the subject. The answer to your question is D. I hope this is the answer that you are looking for and it comes to your help.
Answer:
Los puentes de Hidrógeno, se forman por átomos de Hidrógeno localizados entre átomos pequeños muy electronegativos, cuando un átomo de Hidrógeno está unido covalentemente, a un átomo electronegativo, Oxígeno, Nitrógeno o Flúor, el átomo con mayor electronegatividad atraerá hacia si los electrones del enlace, formándose
si esta respuesta te ayudo, me calificas con 5 estrellitas te lo agradeceria <3
Explanation:
Answer:
meteorite striking the dinosaures
<h2>The given statement is true</h2>
Explanation:
Iron absorption occurs in the duodenum and upper jejunum of small intestine
- At physiological pH ferrous iron is rapidly oxidized to the insoluble ferric form
- Gastric acid lowers the pH in the duodenum which enhances the solubility and uptake of ferric iron
- Once iron gets inside the enterocyte it can be stored as ferritin;Ferritin is a hollow spherical protein which helps in storage and regulation of iron levels within the body
- Ferritin molecule have ferroxidase activity which helps in the mobility of Fe2+ out of the enterocyte by ferroportin
- Transferrin is the major iron transport protein which transports iron through blood
- Fe3+ binds to transferrin so Fe2+ transported through ferroportin must be oxidized to Fe3+
- Fe2+ needs to be oxidized first so that it can be transported through ferroportin
- Once iron gets inside the cell it can be used for various cellular processes
