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Tubular secretion is caused mainly by which of the following transport process?
a) diffusion                
b) osmosis
c) endocytosis            
d) active transport

d

Explanation: movement from lower concentration to higher concentration



Which of the following substance/s are secreted by the tubular secretion?
a) substances which are in great excess
b) substance that are natural poison
c) large proteins and blood cells
d) both a and b

d

Which of the following g important substances are secreted by tubules?
a) Hydrogen ions                    
b) organic ions which are foreign to the body
c) potassium ions       
d) all of these

d

Many drugs are eliminated by which of the following process?
a) ultrafiltration          
b) tubular secretion
c) selective reabsorption 
d) all of these

b

Explanation: Tubular secretion is the transfer of materials from peritubular capillaries to the renal tubular lumen;



Which ion secretion is important in acid-base balance of the body?
a) Hydrogen ions      
b) chloride ions
c) potassium ions       
d) sodium ions

a

Explanation: higher the H ion concentration, higher will be the acidity and vice versa



Human body losses water in which of the following method?
a) evaporation and sweating  
b) urine
c) egestion                  
d) all of these

d

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