6. The Membrane

Which of the following is a defining feature of biological membranes?

How does potassium (K^+) typically move across the cell membrane in animal cells?

Why do phospholipids form a bilayer in the cell membrane?

Which property of the cell membrane allows it to act as a highly selective barrier?

Which of the following molecules would most likely pass unaided through a plasma membrane?

Which of the following molecules add stiffness and strength to the plasma membrane?

Why are O2 and CO2 able to pass through the plasma membrane easily?

In what way do the membranes of eukaryotic cells vary?

The cell membrane of a muscle fiber is called ________.

Which of the following factors does not affect membrane permeability?

Water-soluble hormones bind to __________.

How does the inclusion of cholesterol affect animal cell membranes?

If the layers of the cuticle are very close together, which of the following is most likely to occur?

What is the primary role of the cell membrane in both prokaryotic and eukaryotic cells?

What is the primary purpose of cholesterol in cell membranes?