In the Fluid Mosaic Model of a Typical Plasma Membrane,what

question 4

Multiple Choice

In the fluid mosaic model of a typical plasma membrane,what accounts for the fluidity?

• A) the proteins, being large, cause the membrane to jiggle around.
• B) the phospholipids collectively form a jelly-like substance similar to the cytoplasm.
• C) the phospholipids are not bonded to each other and thus are more free to move around.
• D) water molecules infiltrate the bilayer causing it to become more watery and thus more fluid.
• E) the phospholipids in a typical plasma membrane form covalent bonds which are elastic and allow the membrane to 'stretch'.

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Definitions:

Axon Hillock

The conical region of a neuron's axon where the cell body transitions to the axon, and where action potentials are initiated.

Action Potentials

Brief reversals in the electrical charge of a neuron's membrane, which propagate along the neuron to transmit signals.

Neurilemma

The outermost layer of Schwann cells that surrounds the axon of a neuron, essential for the regeneration of peripheral nerve fibers.

Nissl Bodies

Structures found in nerve cells, involved in protein synthesis and recognized by their dark staining with basic dyes.