Part 1

Question 1

Cell to Cell Communication

Answer 1

Essential for multicellular organisms to survive and function
Communication is accomplished by chemical means

Question 2

Direct Signaling

Answer 2

Physical Contact

Could also involve passage from plant cell to plant cell through plasmodesmata

Question 3

Local Signaling

Answer 3

Growth factors are released into a localized area

Question 4

Long Distance Signaling

Answer 4

Hormones-released into one part of the body to travel to another part of the body
Pheromones-chemical mate attractants released into the environment

Question 5

Signal Transduction Pathway

Answer 5

Reception, Transduction, Response

Question 6

Reception

Answer 6

Molecule binding to membrane receptor protein

Question 7

Transduction

Answer 7

A series of steps in the changing of the signal to something the cell can understand at the nucleus or in the cytoplasm

Question 8

Response

Answer 8

Involves making something or turning on/off an enzymatic process.
Involves DNA transcription and translation or enzymes inside the cell

Question 9

Ligand

Answer 9

Actual signal molecule
Ligand binds to the receptor protein on the cell membrane or inside the cell
Attachment causes a conformational change in the receptor protein
Different ligands=different response