The Cell Membrane

question 29

Multiple Choice

The cell membrane

• A) prevents communication with other cells.
• B) provides an impermeable barrier between the inside and outside of the cell.
• C) helps maintain a constant internal environment.
• D) is covered in proteins that prevent adhesion to surfaces.
• E) keeps hemoglobin within the plasma of the blood.

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Definitions:

Endorphin

Naturally occurring peptides in the brain that act as neurotransmitters to reduce pain and elicit feelings of pleasure or euphoria.

Substance P

Substance P is a neuropeptide involved in the transmission of pain and other sensory signals to the central nervous system.

Capsaicin

A chemical compound found in chili peppers responsible for their hot and spicy flavor, which is also used in topical medications for its pain relief properties.

Substance P

A neuropeptide involved in the transmission of pain and other sensory signals in the central and peripheral nervous system.