Why Do Some Normal Cells Fail to Respond to a Chemical

question 51

Multiple Choice

Why do some normal cells fail to respond to a chemical signal?

• A) Chemical signals are only delivered to specific cells.
• B) Some cells lack the necessary receptors.
• C) Some cells are completely without receptors.
• D) Some cells are completely without ligands.
• E) Signal chemicals often break down before reaching a distant target.

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