The rate of polymerization of actin filaments is given by rate constant K, in which_____

a) the addition of monomers is given by kon (M^–1 sec^–1 ) 

b) the addition of monomers is given by koff  (sec^–1)

c) the loss of monomers is given koff (M^–1 sec^–1 ) 

d) the loss of monomers is given koff (sec^–1)

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#Question id: 22971

#Unit 7. System Physiology – Animal

PTH actions on the kidney:

a. Stimulates phosphate reabsorption

b. Stimulates Ca2+ reabsorption

c. Inhibits phosphate reabsorption

d. Inhibits Ca2+ reabsorption

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#Question id: 22972

#Unit 7. System Physiology – Animal

Parathyroid hormone stimulates calcitriol production in the kidney by increasing the synthesis of 

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#Question id: 22973

#Unit 7. System Physiology – Animal

Which enzyme converts 25-hydroxycholecalciferol to the active form, 1,25-dihydroxycholecalciferol.

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#Question id: 22974

#Unit 7. System Physiology – Animal

In the intestine, 1,25-dihydroxycholecalciferol induces the synthesis of 

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#Question id: 22975

#Unit 7. System Physiology – Animal

1,25-dihydroxycholecalciferol stimulates the,

a. Secretion of phosphate ions from kidney

b. Secretion of calcium from kidney

c. Reabsorption of calcium from kidney

d. Reabsorption of phosphate ions from kidney

TLS Online TPP Program

#Question id: 22976

#Unit 7. System Physiology – Animal

In bone, 1,25-dihydroxycholecalciferol acts synergistically with PTH to stimulate