Rats Are Made Dependent on Morphine and Then Given an Injection

question 112

Multiple Choice

Rats are made dependent on morphine and then given an injection of naloxone while housed in a novel cage. You would expect these rats to express

• A) an aversion to the cage in which naloxone caused withdrawal.
• B) fewer kappa receptors in the forebrain.
• C) more mu receptors in the forebrain.
• D) an attraction to the cage in which naloxone caused withdrawal.
• E) more consumption of water in the home cage.

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Definitions:

Ventricular Systole

Ventricular systole is the phase of the cardiac cycle during which the ventricles contract, pumping blood out of the heart and into the circulatory system.

Semilunar Valves

Heart valves located between the ventricles and the major arteries leaving the heart, which prevent the backflow of blood.

AV Valves

Atrioventricular (AV) valves are valves located between the atria and ventricles of the heart that prevent backflow of blood from the ventricles into the atria during contraction.

Afterload

The pressure against which the heart must work to eject blood during systole.