Cell Signaling

Front

In cell signaling, how is the flow of specific ions regulated?

Back

Opening and closing of ligand-gated channels

Front

Many signal transduction pathways use second messengers to:

Back

relay the message from the inside of the membrane throughout the cytoplasm.

Front

Which of the following can activate a protein by transferring a phosphate group to it? cAMP, G proteins, phosphodiesterase, protein kinase

Back

protein kinase

Front

A receptor protein in a membrane that recognizes a chemical signal is most similar to:

Back

the active site of an enzyme in the cytoplasm that binds to a specific substrate.

Front

What could happen to the target cells in an animal that lack receptors for local regulators?

Back

They would not be able to multiply in response to growth factors from nearby cells.

Front

A signal molecule that binds to a plasma-membrane protein is a

Back

ligand

Front

G protein

Back

protein on the cytoplasmic side of a membrane

Front

What determines whether a cell is a target cell for a particular signal molecule?

Back

signal receptors

Front

What is a chemical message that usually travels through the bloodstream to target cells?

Back

hormone

Front

The 3 steps of signal transduction in order are:

Back

reception, transduction, response