Name:  __________________________________________

ID:    xxx-xx-____


Signature:  _____________________________________
Chapter 26


MULTIPLE CHOICE.  Choose the one alternative that best completes the statement 
or answers the question.

1)  The respiratory mechanism of acid-base balance: 
    A)  requires an enzyme within red blood cells that causes the formation of 
        carbonic acid. 
    B)  includes an increased breathing rate during times of alkalosis. 
    C)  operates well only within a very narrow margin. 
    D)  is considered a chemical buffering system. 


2)  Which of the following two organs function as the most important physiological 
    buffer systems? 
    A)  the lungs and the kidneys 
    B)  the adrenal glands and the testes 
    C)  the thyroid gland and the heart 
    D)  the stomach and the liver 

3)  Extracellular fluid in the human body is composed of all of the following except:  
    A)  lymph and interstitial fluid. 
    B)  blood plasma. 
    C)  cerebrospinal fluid. 
    D)  glucose. 

4)  The most important force causing net water flow across capillary walls is: 
    A)  osmotic pressure of plasma proteins. 
    B)  hydrostatic pressure of capillary blood. 
    C)  hydrostatic pressure of interstitial fluid. 
    D)  intracellular hydrostatic pressure. 

5)  Which of the following hormones is important in stimulating water conservation 
    in the kidneys? 
    A)  aldosterone 
    B)  thymosin 
    C)  antidiuretic hormone 
    D)  atrial natriuretic peptide