Front

What determines whether a signal molecule binds on the surface or enters the cell?

Back

Size, polarity, and ability to cross the membrane determine whether a signal molecule binds on the surface or enters the cell.

Front

How is a cellular response terminated after it has occurred?

Back

A cellular response is terminated by separating the ligand and receptor.

Front

What type of signaling involves a cell responding to signals from itself?

Back

Autocrine signaling involves a cell responding to signals it produces.

Front

What type of signaling involves a cell communicating with nearby cells?

Back

Paracrine signaling involves a cell communicating with nearby cells.

Front

What type of signaling involves long-distance communication through hormones?

Back

Endocrine signaling involves long-distance communication through hormones.

Front

What is programmed cell death known as?

Back

Programmed cell death is known as apoptosis.

Front

What is the role of receptors in cell signaling?

Back

Receptors bind to signal molecules and initiate a cellular response.

Front

What is a ligand in the context of cell signaling?

Back

A ligand is a molecule that binds to a receptor to initiate a signaling pathway.

Front

What is signal transduction?

Back

Signal transduction is the process by which a cell responds to external signals through a series of molecular events.

Front

What is the difference between endocrine and paracrine signaling?

Back

Endocrine signaling involves hormones traveling through the bloodstream to distant targets, while paracrine signaling involves local signaling between nearby cells.