Among invertebrates, increased speed along the axon is brought about by increasing the
diameter of the axon. Among vertebrates, this same function (increased speed) is brought
about by ____________________.
a. insulating the axons with myelin sheath cells
b. increasing the number of pumps
c. increasing the number of sodium gates
d. making axon terminals larger
A
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All of the following pertain to glycolysis except
A. it degrades glucose to CO2 and H2O. B. it occurs without oxygen. C. it occurs during fermentation. D. it involves reduction of NAD. E. it ends with formation of pyruvic acid.
Nonsense mutations are mutations caused by nucleotide substitutions that change one amino acid into
another. Indicate whether the statement is true or false.
The scientific name of humans is Homo sapiens. What is the species of humans?
A. Homo B. sapiens C. Homo sapiens D. Animalia E. Eukarya
Hemopoiesis is the
A. production of only red blood cells. B. loss of blood due to hemorrhaging. C. production of white blood cells, red blood cells, and platelets. D. plugging of broken vessels to stop bleeding. E. migration of white blood cells from the blood out to the tissues.