Prexia

Created by: abe11
Created on: 22-03-23 22:04

What is Pyrexia?

Pyrexia is defined as the rise in body temperature above normal range
E.g over 37.2 (orally)

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Why does pyrexia happen?

Pyrexia is a body’s immune response and not the failure to regulate temperature. Usually responding to an infection or illness.

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Regulating temperature

The hypothalamus in the brain is responsible for regulating out bodies temperature. Acting as a thermostat

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Regulating increase in temp:

Imbalance of homeostasis - may be due to stimulus such as exercise
Blood warms past hypothalamic set point
Hypothalamus detects this change and activates heat loss centre - sweat glands / vasodilation (allowing heat to escape)
Temperature reduces

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Regulating decrease in temp:

Imbalance of homeostasis- may be due to cold environment
Blood cooler than hypothalamic set point
Change detected
Vasoconstriction and muscles activated (causing us to shiver)
Temp regulates

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Causes- pyrogens

Pyrogens are a circulating protein agent that
produces a fever and can reset the thermostat
in the hypothalamus. Causing disruption to homeostasis and raising the body temperature

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Pyrogens

Pyrogens can be either external (Exogeneous) or internal to the body (Endogeneous)

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Other cards in this set

Card 2

Front

Pyrexia is a body’s immune response and not the failure to regulate temperature. Usually responding to an infection or illness.

Back

Why does pyrexia happen?

Card 3

Front

The hypothalamus in the brain is responsible for regulating out bodies temperature. Acting as a thermostat

Back

Card 4

Front

Back

Card 5

Front

Imbalance of homeostasis- may be due to cold environment
Blood cooler than hypothalamic set point
Change detected
Vasoconstriction and muscles activated (causing us to shiver)
Temp regulates

Back

View more cards

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Prexia