Answers

2015-06-27T13:28:05+05:30
Movement of molecules across a cell membrane in the direction against their concentration gradient.
metal ion such as K+ require ion pumps to cross membranes and distribute through the body.
for further details:refer to Biology NCERT text book. chapter: Neural control and Coordination. page no. 317 ( generation and conduction of nerve impulse)
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but i m the student of class 12th mp board
okay.. do you follow any kind of reference book?
2015-06-27T15:10:34+05:30
METAL ION K+ REQUIRE ION TO CROSS MEMBRANES THROUGH BODY
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