Generally, a chemical buffer is described as
A. a strong acid or strong base that brings the pH of a solution to 7.0.
?B. a weak acid and weak base that help prevent big changes in pH.?
C. a neutral molecule that does not influence the pH in any way.?D. a weak acid that makes a solution slightly more basic by its presence.
B
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pH is a measure of
A) [H+]. B) [OH-]. C) Ratio of [H+] to [OH-]. D) Ratio of [OH-] to [H+].
Which characteristic below is not shared by both lipophilic and hydrophilic hormones?
a. amplification of hormone actions in the target cell. b. transport via plasma proteins. c. regulation of metabolic reactions. d. initiation of second messenger systems. e. both (b) and (d) above.
What is the correct anatomical description of the leg?
A. Ankle to toes B. Hip to knee C. Sacrum to knee D. Hip to ankle E. Knee to ankle
The respiratory movement representing the total amount of exchangeable air is the ________
A) tidal volume B) inspiratory reserve volume C) expiratory reserve volume D) vital capacity E) dead space volume