Principles of Biology

The process through which cells can detect and respond to signals in their extracellular environment is

In some cases,just a few hormone molecules binding to the surface of a cell can trigger a very large response because

A substrate binding to an enzyme is most similar to a signal molecule binding to a

After being fed glucose a cell increases its intracellular glucose concentrations by

During exposure to elevated glucose,a yeast cell will increase its uptake of glucose.Describe the mechanism by which the yeast sense the extracellular glucose.

A cell secretes a growth factor that binds to receptors on neighboring cells causing them to proliferate.This is an example of

A cell secretes a growth factor that binds to receptors on its own membrane preventing it from proliferating.This is an example of

Insulin is secreted from the pancreas and acts on muscle cells to increase glucose uptake.This is an example of

Sodium ions move from one cardiac muscle cell to an adjacent cell causing them to contract in unison.This is an example of

Diabetics can be given insulin which binds to receptors on cells throughout the body increasing glucose uptake.Insulin is an example of a

Hormones are released from one cell and act on other cells in distant organs.This is an example of

What do contact-dependent signaling and paracrine signaling have in common?

A cell responds to a signal it sent.This is an example of

When the concentration of a ligand is equal to the K_D,

G-protein coupled,enzyme-linked,and ligand-gated ion channel receptors are similar in that they

A key is placed into a keyhole then turned and the door opens.When considering the components of cell signaling,the action of turning the key would best correspond to

If the concentration of a ligand is 100 times greater than the Kd of its receptor,

When epidermal growth factor binds to a(n)_______ receptor,the receptor phosphorylates itself,triggering a signal transduction pathway.

What happens immediately after a signaling molecule binds to its G-protein coupled receptor (GPCR)?

Following its initial activation,what becomes of a G protein?