Membrane Structure and Diffusion

The plasma membrane is best described as ___________ permeable.

• selectively permeable

• completely permeable

• impenetrable

• unimportant

Tags

NGSS.MS-LS1-2

The plasma membrane helps to maintain ___________ in a cell.

• homeostasis

• imbalance

• detrimental conditions

• imperfect conditions

Tags

NGSS.MS-LS1-2

The _________________ model describes the structure of the plasma membrane.

• fluid mosaic

• double helix

• Bohr

• distribution

Tags

NGSS.MS-LS1-2

The majority of the plasma membrane is composed of a bilayer of ______.

• phospholipids

• proteins

• carbohydrates

• cholesterol

What property does the phospholipid bilayer give to a plasma membrane?

• provides a barrier between the inside and outside of the cell

• communicates between cells that are great distances apart

• conducts electrical impulses in nerve cells

• allows cells to bind to each other

Select all that apply.

Plasma membranes are composed of a bilayer of phospholipids with ________, _________, and ________ embedded within.

• proteins

• carbohydrates

• DNA

• cholesterol

What does A represent?

• hydrophilic phosphate heads

• hydrophobic phosphate heads

• membrane proteins

• cholesterol

What does D represent?

• hydrophilic fatty acid tails

• hydrophobic fatty acid tails

• membrane proteins

• cholesterol

What do E and F represent?

• phosphlipids

• carbohydrates

• membrane proteins

• cholesterol

What does C represent?

• phosphlipids

• carbohydrates

• membrane proteins

• cholesterol