1. Review Quiz
Please open this review in a slide show mode. Answer a question first, then go to the next slide for the correct answer.

2. Choose the correct order of events in a signal transduction pathway from beginning to end.
the receptor activates a protein at the membrane->a first messenger binds to the cell-surface receptor->second messenger molecules are released->final target causes response
second messenger molecules are released->final target causes response-> a first messenger binds to the cell-surface-> the receptor activates a protein at the membrane
a first messenger binds to the cell-surface receptor-> the receptor activates a protein at the membrane-> second messenger molecules are released->final target causes response
none of the above

3. Choose the correct order of events in a signal transduction pathway from beginning to end.
the receptor activates a protein at the membrane->a first messenger binds to the cell-surface receptor->second messenger molecules are released->final target causes response
second messenger molecules are released->final target causes response-> a first messenger binds to the cell-surface-> the receptor activates a protein at the membrane
a first messenger binds to the cell-surface receptor-> the receptor activates a protein at the membrane-> second messenger molecules are released->final target causes response
none of the above

4. Which of these is not a second messenger?
CAMP
DAG
IP3
R2D2
CGMP

5. Which of these is not a second messenger?
CAMP
DAG
IP3
R2D2
CGMP

6. A G protein becomes active when _____
It is bound by its neurotransmitter and transported to the nucleus
It is phosphorylated by protein kinase
as the result of a first messenger altering the shape of its receptor
Ca2+ binds to a protein-linked receptor

7. A G protein becomes active when _____
It is bound by its neurotransmitter and transported to the nucleus
It is phosphorylated by protein kinase
as the result of a first messenger altering the shape of its receptor
Ca2+ binds to a protein-linked receptor

8. A kinase is an enzyme that performs
phosphorylation
as a membrane channel
active transport
protein synthesis
as an antibody

9. A kinase is an enzyme that performs
phosphorylation
as a membrane channel
active transport
protein synthesis
as an antibody

10. An activated G protein can trigger
the activation of adenyl cyclase
the opening of calcium ion channels in the membrane
the release of calcium ions from intracellular stores
a fall in cAMP levels
all of the answers are correct

11. An activated G protein can trigger
the activation of adenyl cyclase
the opening of calcium ion channels in the membrane
the release of calcium ions from intracellular stores
a fall in cAMP levels
all of the answers are correct

12. Calcium ions serve as messengers, often in combination with the intracellular protein
calcitonin
calcitriol
calmodulin
calcium-binding globulin
calcitropin

13. Calcium ions serve as messengers, often in combination with the intracellular protein
calcitonin
calcitriol
calmodulin
calcium-binding globulin
calcitropin

14. Hormones can operate on the ________ level of organization.
cellular
tissue
organ
organismic
all of the answers are correct

15. Hormones can operate on the ________ level of organization.
cellular
tissue
organ
organismic
all of the answers are correct