highly stressful situation - zkadhem

[ArchivalUser]

23.
When a person has no sense of control over a highly stressful situation, which of the following physiologic reactions would be expected to occur?
A.Weaker corticosteroid elevations will develop
B.An endogenous opioid peptide will be released
C.Diminished suppression of the cytotoxicity of natural killer cells will occur
D.A stronger immune response to mitogen stimulation will develop

[ArchivalUser]

bb

[ArchivalUser]

i have a doubt between A ( but i think that it is higher elevation of corticosteroid dont know why) and C...go for C...

[ArchivalUser]

bbb

[ArchivalUser]

The answer is: B

Stress without the sense of control has been found to influence the release of endogenous opioid peptides, such as -endorphin. When one learns that one has no control over a stressful situation, an opiate-based analgesia occurs. Both uncontrollable and controllable stressors produce a brief poststressor analgesia, but only the opioid produced by inescapable stressors can be blocked by administering opiate antagonists. Both controllable and uncontrollable stress situations suppress the cytotoxicity of natural killer cells, but inescapable and uncontrollable stress results in greater suppression than does controllable and escapable stress. Corticosteroid release during uncontrollable or inescapable stress is somewhat greater than when the stress can be controlled or escaped. Corticosteroid levels also decline more slowly after uncontrollable stress.