unity College- BIOL 2154-Fall17-KNEAFSEY> Activities and Due Dates > CH3 9/3/201

Question

unity College- BIOL 2154-Fall17-KNEAFSEY> Activities and Due Dates > CH3 9/3/2017 11:55 PM 31/10 Gradeb Print iCalcuetor Periodic Table Question 4 of 19 Sapling Learning Map o Plasma membranes are O the membrane allows substances to pass through freely. the membrane allows substances to exit the cell, but not to enter the membrane regulates what enters and leaves the cell. O the membrane allows only water, but not solutes, to enter and leave the cell. O Previous ave. Up & View Sciuton Check Answer e Nee 8 Ext- about us | careers dpriocy policy terms of use l contact us

Explanation / Answer

For the first question:

Selectively permeable means membranes that regulate what enters and leaves the cell

(Do note that semi permeable and selectively permeable are different)

For the second question;

Integral membrane proteins are a) can extend through the cell membrane, b) pump substances across the cell membrane

While peripheral membrane proteins a) attached at the cell membrane surface b) can move laterally in the hydrophobic part of the membrane

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