Which cells in the distal and collecting tubules are responsible for regulating acid-base balance?
a. peripheral cells
b. principal cells
c. intercalated cells
d. goblet cells
e. Henle cells
c
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Muscles may be named according to ________.
A. speed B. action C. age D. myofilament type
A skeletal muscle generates the greatest tension when it is ________.
A. well-rested and low in creatine phosphate B. fully relaxed before being stimulated C. greatly stretched before being stimulated D. high in lactate concentration E. partially stretched before being stimulated
Which is NOT true about cofactors involved in enzymatic reactions?
A. They may alter the conformation of the enzyme. B. Only a small number of cofactor molecules may be needed to maintain enzyme activity. C. They may be a metal such as iron. D. There must be equal quantities of enzyme and cofactor molecules for a reaction to proceed. E. They may be a substrate in a catalyzed reaction.
Which of the following is found in orbitals surrounding the nucleus of the atom?
a. proton b. neutron c. electron d. both proton and neutron