Ch.3

Question 1

Three major cavities

Answer 1

Cranial, thoracic, abdominopelvic

Question 2

Fluid-filled compartments

Answer 2

Eyes
Cerebrospinal fluid
Circulatory system
Pleural and pericardial sacs

Question 3

The cell membrane separates cell from environment. Function

Answer 3

-cell isolation
-Communication between cell and environment(ligands and cell)
-Regulation of exchange with the environment
- Structural support
secretion cell releases substances into the extracellular space

Question 4

Membranes are made up of

Answer 4

Phospholipids, cholesterol, proteins

Question 5

Phospholipid structures in aqueous solutions. The main one and the other two

Answer 5

Bilayer* (2 layers)
Micelle (sphere)
Liposome (inside out)

Question 6

Membrane proteins can have modification

Answer 6

1) Lipid is added- anchoring proteins
2) sugar is added- becomes glycoproteins

Question 7

Peripheral proteins can be removed without disrupting the integrity of the membrane
T/F

Answer 7

True

Question 8

Phospholipids heads face

Answer 8

the aqeuous intracellular/extracellular compartments

Question 9

Lipid tails form the

Answer 9

interior of the membrane

Question 10

Cholesterol molecules insert themselves into the lipid bilayer. This helps with

Answer 10

Keeping the membrane fluid. Proteins can also be found in the membrane

Question 11

Categories of proteins

Answer 11

Integral vs peripheral proteins
Transmembrane proteins ( can be classified as integral)
Lipid-anchored-proteins(contain fatty acids that anchor proteins to cell membrane- such as human Ras protein)