In the cyclic AMP second messenger system, binding of the first messenger to a surface receptor leads to activation of ____, which induces the conversion of intracellular ____ to cyclic AMP
a. adenylate cyclase, ATP.
b. adenylate cyclase, ADP.
c. phospholipase C, ATP.
d. phospholipase C, ADP.
e. protein kinase, ATP.
A
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Which of the following relationships is correct?
A. m = F/a B. F = m/a C. a = m/F D. none of the above
The anatomy of the thoracic cage provides ridged support and protection but at the same time is also flexible and mobile. Of the list below, which feature does not aid in the flexibility and movement of the thoracic cage?
A) the jugular notch B) the costal spaces occupied by costal muscle C) the sternal angle D) the costal cartilages
In sodium channels at the resting membrane potential, __________.
A. the activation gate is closed and the inactivation gate is open B. the activation and inactivation gates are closed C. the activation gate is open and the inactivation gate is closed D. both gates are open
Predict the effect on the ventricles if the AV node delay was shorter than normal
What will be an ideal response?