Multiple Choice
Which of the following is a key component of cell signaling?
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10. Cell Signaling
Introduction to Cell Signaling
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In the context of cell signaling, what is autocrine signaling?
A
A type of signaling where a cell targets nearby cells, releasing signals that bind to receptors on adjacent cells.
B
A type of signaling where a cell targets cells of a different organism, releasing signals that affect the host.
C
A type of signaling where a cell targets distant cells, releasing signals that travel through the bloodstream.
D
A type of signaling where a cell targets itself, releasing signals that bind to receptors on its own surface.
Verified step by step guidance1
Understand the concept of cell signaling: Cell signaling is a complex system of communication that governs basic cellular activities and coordinates cell actions. It involves the release of signaling molecules by a cell, which then bind to receptors on target cells to elicit a response.
Identify the different types of cell signaling: There are several types of cell signaling, including autocrine, paracrine, endocrine, and juxtacrine signaling. Each type is characterized by the distance over which the signaling molecules travel and the target cells they affect.
Define autocrine signaling: Autocrine signaling is a type of cell signaling where a cell releases signaling molecules that bind to receptors on its own surface. This means the cell is both the sender and the receiver of the signal, allowing it to regulate its own activities.
Differentiate autocrine signaling from other types: Unlike paracrine signaling, which targets nearby cells, or endocrine signaling, which involves signals traveling through the bloodstream to distant cells, autocrine signaling is self-targeted. This is crucial for processes like cell growth and immune responses.
Apply the definition to the problem: Based on the definition of autocrine signaling, the correct answer is the option that describes a cell targeting itself, releasing signals that bind to receptors on its own surface. This distinguishes it from other signaling types that involve different target cells or organisms.
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