Body temperature control. When pigs are infected with influenza virus, activated
ID: 3508548 • Letter: B
Question
Body temperature control. When pigs are infected with influenza virus, activated immune cells and endothelial cells release extracellular signal molecules called pyrogens that act as signals to the anterior hypothalamus in the pig's brain to raise the setpoint for body teperature. For example pigs infected with influenza will commonly see a rise in the body temperature setpoint from 102.5 up to 105. The resulting elevated body temperature helps the immune system fight the viral infection by enhancing leukocyte activity.
During the onset of disease the pigs experience a condition where their body temp (102.5) is lower than their new setpoint (105). Describe all the elements of the reflex pathway that would be activated when the pigs are experiencing this onset of the fever. Be sure to label and describe all the components of the activated reflex pathway (stimulus, sensor, integrating center, effectores and response) and be sure your answer takes into consideration the species of animal affected in this problem.
Explanation / Answer
when the pigs are down with influenza, the temperaature is reaised to stimulate the immune system. The reflex involved is.
Stimulus is pyrogens
Sensor is brain
integrating cener is hypothalamus
effectors are lymphocytes
response is T lymphocytes differentiate to form CD8 T cells which is capable of destoring infected cells.
This reflex helps in providing immunity when the pig is infected with virus.
this is a protective reflex.