The Function of P Cells Found in the Sinoatrial Node

question 27

Multiple Choice

The function of P cells found in the sinoatrial node and Purkinje fibers is that they:

• A)are receptors for pain stimuli, such as the pain that occurs during infarction.
• B)prolong the refractory period before the next contraction.
• C)are assumed to be the site of impulse formation.
• D)initiate repolarization of the myocardium.

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Definitions:

Equilibrium Dollar Price

Refers to the price level at which the supply of dollars in the foreign exchange market is equal to the demand for dollars.

Flexible Exchange Rates

A foreign exchange system where the value of currencies is determined by market forces without direct government intervention.

Libras

A constellation in the zodiac, symbolized by the scales, or in a financial context, might be mistaken for "libra," which refers to a unit of weight or a former currency.

Freely Floating Exchange Rates

Exchange rates that are determined by the supply and demand for currencies in the foreign exchange market without direct intervention by countries' governments.