Small Nonpolar Molecules, Such as O₂ and CO₂, Enter a Cell

question 55

Multiple Choice

Small nonpolar molecules, such as O₂ and CO₂, enter a cell by:

• A)active transport.
• B)osmosis.
• C)facilitated diffusion.
• D)vesicle-mediated transport.
• E)simple diffusion.

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Definitions:

Dorsal Roots

The sensory branches of spinal nerves that transmit sensory information from the peripheral nervous system to the spinal cord.

Spinal Cord

A long, thin, tubular bundle of nervous tissue and support cells that extends from the brainstem down the back, transmitting nerve signals to and from the brain.

Sensory Neurons

Nerve cells responsible for converting external stimuli from the organism's environment into internal electrical impulses.

Resting Potential

Membrane potential of a neuron at rest.