Plasma Membranes Are Best Described as a

question 30

Multiple Choice

Plasma membranes are best described as a

• A) single layer of phospholipids with tails pointed toward the inside of the cell.
• B) double layer of phospholipids with hydrophilic heads facing away from one another.
• C) single layer of phospholipids with water molecules attached along one side.
• D) double layer of phospholipids with hydrophobic tails facing toward one another.
• E) double layer of phospholipids with hydrophobic tails facing away from each other (toward the cytoplasm of the cell and the extracellular solution).

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Definitions:

Fibrin

A fibrous, non-globular protein involved in the clotting of blood, formed by the action of the enzyme thrombin on fibrinogen.

Leukapheresis

A medical procedure that involves the separation and removal of white blood cells from the blood.

Erythrocyte Sedimentation Rate (ESR)

A blood test that measures how quickly erythrocytes (red blood cells) settle at the bottom of a test tube that contains a blood sample.

Hematocrit (HCT)

A test measuring the proportion of red blood cells in the blood, indicating overall health and possible conditions like anemia.