The Plasma Membrane

question 37

Multiple Choice

The plasma membrane

• A) appears under an electron microscope as a double dark line with a light space between
• B) is composed primarily of a double layer of protein molecules with cholesterol molecules interspersed between them
• C) has a hydrophilic region between two hydrophobic regions
• D) all of these
• E) none of these

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Definitions:

Tetrapods

Four-limbed vertebrates: the amphibians, reptiles, birds, and mammals.

Actinopterygii

Actinopterygii, commonly known as ray-finned fishes, constitute a class of bony fishes characterized by the radiating structure of their fins, which are supported by bony spines.

Flexible Fins

Adaptations in aquatic organisms allowing for maneuverability, stability, and propulsion in water.

Temporal Openings

Temporal Openings are large gaps or spaces in the skulls of some vertebrates, allowing for the attachment of jaw muscles thus facilitating movement and strength.