Chapter 9: Cell Communication

Question 1

Which of the following receptor types is used by EGF or insulin signaling pathways?

Answer 1

Enzyme-linked receptor

Question 2

Cyclic AMP (cAMP) amplifies the signal during cell communication by acting as a _____ __________.

Answer 2

Second Messenger

Question 3

Signal amplification during cell communication is facilitated by ______ ________.

Answer 3

Second Messengers

Question 4

Which of these forms of chemical signaling allows for coordination of instantaneous action between cells?

Answer 4

Gap Junction Signaling

Question 5

What are 4 types of cell signaling?

Answer 5

• Autocrine
• Gap Junction Signaling
• Paracrine Signaling
• Endocrine Signaling

Question 6

What are 3 common types of cell surface receptors used in cell signaling?

Answer 6

Type 1: Ion channel-linked receptors
Type 2: G-Protein-linked receptors
Type 3: Enzyme-linked receptors

Question 7

what type of cells use Autoinducers as signals for cell communication?

Answer 7

Bacteria

Question 8

Dimerization upon signal (ligand) binding is a key characteristic of what type of receptors?

Answer 8

Enzyme linked

Question 9

What kind of molecules use an internal receptor for cell signaling?

Answer 9

Hydrophobic Molecules

Question 10

which one of these molecules (GTP or GDP) need to bind the G-Protein to turn it on?

Answer 10

GTP

Question 11

Enzymes (proteins) that phosphorylate their substrates (other proteins) are called

Answer 11

KINASES

Question 12

Enzymes (proteins) that dephosphorylate their substrates (other proteins) are called

Answer 12

PHOSPHATASES