Figure 3-1 the Plasma Membrane

question 2

Multiple Choice

Figure 3-1 The Plasma membrane


Use Figure 3-1 to answer the following questions.
-Microfilaments are labeled

• A) 1.
• B) 2.
• C) 3.
• D) 5.
• E) 6.

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Definitions:

Pulmonary Surfactant

A complex mixture of lipids and proteins secreted by cells in the lungs, reducing surface tension and preventing the collapse of alveoli at the end of expiration.

Alveoli

Tiny air sacs in the lungs where gas exchange between the air and blood takes place.

Cohesive Forces

Attractive forces between similar molecules that hold a substance together, such as the attraction between water molecules.

Surface Tension

The elastic tendency of a fluid surface which makes it acquire the least surface area possible, acting like a stretched elastic membrane.