Exam 14: Signal Transduction Mechanisms: Iimessengers and Receptors

You are testing a drug that might be marketed as an anti-inflammatory agent.It would be a good choice if it possessed which of the following responses?

The ultimate,coordinated response of cells to a vast array of signals from the environment is known as ________.

Which of the following is not a receptor tyrosine kinase?

It would be useful to determine if the mechanism of action for the XFFXFF receptor is similar to that of estrogen or epinephrine.To test this,you use a nonhydrolyzable analogue of GTP in the reaction mixture.If the mechanism is still similar to that of epinephrine,you would expect the cellular responses would be

Desensitization of a cell to a ligand may involve all of the following except

IP₃ receptors are associated with

A developing organism's failure to produce muscle tissue is most likely due to

In animal eggs,once fertilization occurs,________ are the second messengers that trigger egg activation.

IL-2 is a growth factor that acts on

Which of the following are associated with the binding of numerous signaling molecules and regulating their responses in multi-enzyme complexes?

Kinases are enzymes that

All of the following are second messengers,except

A strain of Drosophila known as dunce produces one-half the amount of cAMP phosphodiesterase than the wild type flies.Using your knowledge of cell signalling based upon cAMP,what effects would you expect in the dunce flies?

________ nucleotides are common signals in animal cells but not in plant cells.

Design experiments that would allow you to independently detect each of the following: G-protein mediated signal transduction,nitric oxide signal transduction,and calcium ion fluxes.

With regard to hormones,responses occurring over the shortest distance would be classified as

You wish to determine if cytosolic calcium fluxes are associated with signal transduction in a particular cell type.One means of observing the calcium fluxes would be to utilize

All of the following are second messengers except

Kinases and phosphatases are essential in the cell because they