The kidneys are much more powerful than the acid-base buffer and the respiratory center mechanisms in controlling blood pH.
Answer the following statement true (T) or false (F)
True
Only the kidneys can rid the body of a wide range of acidic and basic substances and adjust the pH.
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You have identified a novel cytoplasmic protein. Through sequence analysis you are able to identify the presence of a number of serine/threonine phosphorylation motifs. Based on these data, you hypothesize that this protein may be a substrate for what kind of enzyme?
A. A phospholipase B. A receptor tyrosine kinase C. A G protein-coupled receptor D. A protein kinase E. A tyrosine phosphatase
How does baker's yeast in bread dough make the bread rise?
What will be an ideal response?
Females need more dietary iron than males because they
A) lose more iron (during menstruation). B) have fewer red blood cells. C) have less bone marrow. D) eat less red meat than males. E) have a smaller volume of blood.
Internal pH changes of a bacterium can cause drastic problems for the cell. Which of the following situations do not occur when the internal pH of a bacteria changes?
A) Lethal denaturing of enzymes B) Limited production of ATP C) Altered membrane potential of the cell D) Endospores enter the vegetative cycle