1)whch statement is more correct-
gaseous exchange occurs through cappilary wall or
gaseous exchange occurs in alveolar cavity

2)when whole blood stored with an anticoagulant at 4 degree Celsius the potassium moves out from rbc into plasma.
reason for it is
RBC heamolyse and hence leakage of k
k becomes more mobile at 4 degree 
active transport ceases resulting in ionic equilibrium

pls asnwer these two mcqs with explanations 
 

Dear student,

1. The alveoli are the primary sites of gaseous exchange in the respiratory process. The gaseous exchange which takes place through the capillary wall is primarily based on pressure/concentration gradient. The gaseous exchange does not occur in the alveolar cavity
Therefore, "the gaseous exchange occurs through the capillary wall" is more correct.

2. The Na⁺/K⁺ pump is inactive at 4°C, and K⁺ is highly sensitive to changes in temperature. Therefore, potassium leaks out until a new equilibrium is reached.
Therefore, "active transport ceases resulting in ionic equilibrium" is correct.

Regards,