When cells send a signal, it is often in the form of a secreted molecule....
BIOLOGY
SAT 2021
When cells send a signal, it is often in the form of a secreted molecule. In some cases, a cell will secrete a molecule that binds to a receptor on its own cell surface. What type of signaling is this?
- A. Autocrine
- B. Paracrine
- C. Endocrine
- D. Exocrine
Correct Answer: A. Autocrine
Explanation
When a molecule binds to a receptor on a cell surface, it means that a signal has been received by that cell. In this case, the cell that sent the signal is the same cell that is receiving the signal. Autocrine signaling is the term that describes a cell sending a signal to itself (
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