AP Cell Communication

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

• phosphorylation cascade

• cAMP

• signal receptors

• phosphatase

Do plant cells communicate using hormones?

• yes

• no

An example of LOCAL cell communication is:

• White blood cells bumping into each other sharing antigen info

• Neurons communicating across a synapse

• Hormones traveling through the blood stream to target tissues

An example of DIRECT cell communication is:

• White blood cells bumping into each other sharing antigen info

• Neurons communicating across a synapse

• Hormones traveling through the blood stream to target tissues

After a ligand binds, the intracellular domain of a receptor protein changes _____, initiating transduction of the signal.

• color

• size

• shape

What are the three general ways cells communicate?

• Direct Contact, Local Signaling, Long-distance signaling

• Reception, Transduction, Response

• Paracrine signaling, Synaptic signaling, Endocrine signaling

• G protein coupled receptors, Ion channels, Ligand gated ion channels

Which type of cell junctions allow signaling substances and other material to pass freely between adjacent animal cells?

• Gap junctions

• Plasmodesmata

• G protein coupled receptors

• Ligand gated ion channels

Which type of cell junctions allow signaling substances and other material to pass freely between adjacent plant cells?

• Gap junctions

• Plasmodesmata

• G protein coupled receptors

• Ligand gated ion channels

This is an example of

• paracrine signaling

• long distance endocrine signaling

• self signaling

• direct contact signaling

When a signal molecule arrives at the appropriate G protein-coupled receptor, the receptor changes its conformation, a GTP binds to the alpha subunit, and the G protein alpha and beta/gamma subunits _____________ .

• come together to form an alpha/beta/gamma complex

• separate and are both active

• are inactivated and then separate

• bind to calcium Ca++ and open Calcium ion channels