Question

anatomy & physiology cells and their environment worksheet
list 4 functions of the cell or plasma membrane:
a
b.
c
d.
correctly color - code and identify the name for each part of the cell membrane.
letter name/color
a phospholipid bilayer (no color)
b integral protein (pink)
c fatty acid tails (orange)
d phosphate heads (yellow)
letter name/color
e peripheral protein (red)
f cholesterol (blue)
g glycoprotein (green)
h glycolipids (purple)
match the cell membrane structure or its function with the correct letter from the cell membranes diagram.
letter structure/function letter structure/function
attracts water repels water
helps maintain flexibility of membrane make up the bilayer
involved in cell - to - cell recogni help transport certain materials across the cell membrane

Explanation:

The cell membrane has several functions. It acts as a barrier (regulates what enters and exits the cell), provides structural support, is involved in cell - cell communication through receptors, and allows for cell adhesion. The phosphate heads of the phospholipids attract water (are hydrophilic) while the fatty - acid tails repel water (are hydrophobic). Cholesterol helps maintain membrane flexibility. Glycoproteins and glycolipids are involved in cell - to - cell recognition. Integral proteins can help transport materials across the membrane.

Answer:

1. Functions of the cell or plasma membrane:

• a. Regulation of substance entry/exit (barrier function)
• b. Structural support
• c. Cell - cell communication
• d. Cell adhesion

1. Matching cell membrane structures with functions:

• Attracts water: Phosphate heads (G in the diagram as they are the polar heads of the phospholipids)
• Helps maintain flexibility of membrane: Cholesterol (F in the diagram)
• Involved in cell - to - cell recognition: Glycoproteins and glycolipids (E in the diagram for glycoproteins which are often involved in recognition)
• Repels water: Fatty acid tails (I in the diagram as they are the non - polar tails of the phospholipids)
• Make up the bilayer: Phospholipids (A in the diagram represents the phospholipid bilayer)
• Help transport certain materials across the cell membrane: Integral proteins (B in the diagram represents an integral protein forming a channel for transport)