Cell Communication Quiz

What is the primary role of ligands in cell communication?

• To transport ions across the cell membrane

• To break down glucose for energy

• To bind to receptors and activate them

• To replicate DNA within the cell

Which type of cell signaling involves a signal traveling long distances through the bloodstream?

• Autocrine signaling

• Paracrine signaling

• Endocrine signaling

• Direct cell-to-cell contact

What is apoptosis?

• Programmed cell death

• The activation of a gene expression

• The replication of a cell's DNA

• The process of cell division

Which type of feedback in cellular pathways results in the amplification of a process?

• Positive feedback

• Negative feedback

• Transduction feedback

• Reception feedback

What are receptors?

• Molecules that bind to ligands

• Proteins that detect external signals

• Signals that detect proteins

• Antennas that transmit signals

What do ligands do?

• Transmit signals to antennas

• Detect external proteins

• Bind to receptors

• Act as receptors

Where does the signal that cells communicate with typically come from?

• The interior of the cell

• The exterior of the cell

• The nucleus of the cell

• The endoplasmic reticulum

What is the form of chemical signaling where a cell targets itself called?

• Paracrine

• Autocrine

• Endocrine

• Signaling across gap junctions

Which form of chemical signaling involves a cell targeting a nearby cell?

• Autocrine

• Endocrine

• Paracrine

• Signaling across gap junctions

How do cells communicate through gap junctions?

• A cell targets a distant cell through the bloodstream.

• A cell targets itself.

• A cell targets a nearby cell.

• A cell targets a cell connected by gap junctions.