What I Think It Is, Global Warming :)
Go off kacey, as she should.
The types are smooth and rough.
smooth muscles are controlled by your brain, not you (digestion, circulation).
rough muscles are controlled by you (moving your leg)
Hope this helps!
B. Proteins
Hence why body builds drink protein shakes in order to build muscle.
Selective permeability is the cell wall being particular about what they let in and out of the cell. It is important because if the cell just let any old molecule inside, it would be letting potentially harmful things in.
