plz answer these

[hydroxyappatite]

---

Members do not see this ad.

1. methyl xanthines such as caffine n theophyliine enhance lipolysis in adipose tissue by
a] inducing adenylate cyclase synthesis
b]inducing triglyceride lipase synthesis
c]inhibiting cyclic amp phosphodiestrase activity
d]directly activating intracellular protien kinase
e]enhancing binding of epinephrine to an extra cellular membrane receptor

which of the following can increase the rate of net flux or diffusion of oxygen through the alveolar membrane?
a]decreasing the temperature
b]inc the cross sectional area
c]decreasing the conc. gradient
d]inc path lenght of difusion

 

[doc76]

1. methyl xanthines such as caffine n theophyliine enhance lipolysis in adipose tissue by
a] inducing adenylate cyclase synthesis
b]inducing triglyceride lipase synthesis
c]inhibiting cyclic amp phosphodiestrase activity
d]directly activating intracellular protien kinase
e]enhancing binding of epinephrine to an extra cellular membrane receptor

which of the following can increase the rate of net flux or diffusion of oxygen through the alveolar membrane?
a]decreasing the temperature
b]inc the cross sectional area
c]decreasing the conc. gradient
d]inc path lenght of difusion

1..c
2...b
correct me if i am wrong

 

[hydroxyappatite]

could u plz explain why choice c in the first one
n wudnt increasing the cross sectioonal area decrease the rate of diffusion as ...... it'll make the membrane thicker isnt it?😕

 

[skabbaraju]

could u plz explain why choice c in the first one
n wudnt increasing the cross sectioonal area decrease the rate of diffusion as ...... it'll make the membrane thicker isnt it?😕

Both answers are correct. Please refer to Kaplan or Dental Decks for further clarification.

 

[impaction]

1. methyl xanthines such as caffine n theophyliine enhance lipolysis in adipose tissue by
a] inducing adenylate cyclase synthesis
b]inducing triglyceride lipase synthesis
c]inhibiting cyclic amp phosphodiestrase activity
d]directly activating intracellular protien kinase
e]enhancing binding of epinephrine to an extra cellular membrane receptor

which of the following can increase the rate of net flux or diffusion of oxygen through the alveolar membrane?
a]decreasing the temperature
b]inc the cross sectional area
c]decreasing the conc. gradient
d]inc path lenght of difusion

as the rate of diffusion is directly proportional to area of cross section, so if we increase the area, the rate of diffusion should increase. remember the formula for rate of effusion.