Thermoregulation Flashcards Preview

Nur 111 - Unit 4 Exam > Thermoregulation > Flashcards

Flashcards in Thermoregulation Deck (38):
1

must be a balance between the heat produced by your body and the heat that your body produces

thermoregulation

2

temperature of the deep tissues of the body, chest, abdominal/pelvic cavity. The core area includes your heart, lungs, stomach and bowel.

core temperature

3

temperature of the skin, the subcutaneous tissue, and includes the blood vessels. this type of temperature changes with the environment

surface temperature

4

heat loss that can not be measured (hypothalamus control temperature) accounts for about 10% of the basal heat loss in the body

insensible heat loss

5

The point (temperature) where your hypothalamic thermostatis set

set - point

6

basal metabolism, muscle contraction, increased metabolic rate is classified as...

heat production

7

shivering and vasoconstriction is classified as....

heat conservation

8

evaporation (sweating), conduction (contact with cold surfaces), radiation (vasodilation of blood vessels in the skin), convection (contact with air currents) is classified as...

Heat loss

9

what aids in the regulation of body temperature?

#1 sensors in the periphery and in the core
#2 hypothalamic integrator (control center)
#3 effector system (what does the effect does the body have in response to the control center)

10

where are most sensory receptors located in the skin?

skin

11

what are the three physiologic processes to increase the body temperature take place ?

shivering
sweating is inhibited to conserve heat
vasoconstriction (sends blood back to the core)

12

The skin has more receptors for when you are ____ rather than when you are _____.

cold ; warm

13

center that controls the core temperature

hypothalamic intergrator

14

what are the two types of sensors released by the hypothalamic intergrator?

heat hypothalamus sensors
cold hypthalamus sensors

15

adjusts the production and loss of heat

Effector system

16

what initiates the effectors?

signals from cold-sensitive or heat-sensitive receptors

17

internal clock in the brain

circadian rhythm

18

factors affecting body temperature

hormones, age, environment, stress, circadian rhythm

19

infants respond very drastically to the external environment and can lose up to 3% of their body heat through their head.

some life span considerations to consider for thermoregulation

20

how do you convert Fahrenheit to Celsius ?

(fahrenheit temperature - 32) x 5/9

21

How do you convert Fahrenheit to Celsius?

(Celsisus temperature x 9/5) + 32

22

any agent that causes fever

pyrogen

23

What are the different types of fever?

intermittent, remittent, relasping, constant, fever spike

24

what are the benefits of a fever?

pattern is useful in diagnosing certain organisms

25

bacteria, viruses, fungi, allergens, foreign substances, incompatible blood products, (drugs/substances formed by micro-organsims that induce fever)

exogenous pyrogens

26

infection caused by an infectious agent already present in the body. (example E. Coli from the GI tract that enters the urinary tract)

endogenous pyrogens

27

pyrogens act on the hypothalamus to reset the set point. increased HR, RR, chills, feeling of coldness, pallor/cold skin and cyanotic nail beds due to vasoconstriction, shivering, goosebumps, c/o feeling cold cessation of sweating

onset chill phase (last for about 10 - 30 minutes)

28

the core temperature reaches this new set point. No chills, skin feels warm, photosensitivty, glassy eye appearance, increased delirium, convulsions, fever blister, loss of appetite, aching muscles, and weakness

course/plateau phase

29

a temperature spike usually occurs and may have an increase up to 106-108 F. what kind of effect can this have on your body?

can severely damage the brain, liver, kidneys and other organs

30

Cause of temperature is removed, new set point causes heat loss response (sweating, flushed skin appearance, skin feel warm, decreased shivering, possible dehydation

Defercesence/fever abatement/ flush phase
(during this phase you would want to reduce physical activity to limit heat production)

31

regulated rise in the core body temperature to 1-2 degrees higher

Fever (pyrexia)
(OLDER ADULTS CAN BE INFECTED WITHOUT FEVER)

32

non-regulated rise in temperature caused by imbalance between heat loss and heat gain. ( not a true fever) can be characterized by flushed skin, increased temperature above normal range, tachycardia, tachypnea, warm to touch, seizures in children?

hyperthermia

33

happens between the temperatures of 101 F - 102 F and is characterized by paleness, dizziness, nausea, vomiting, diarrhea, and fainting

Heat exhaustion

34

happens when the temperature is greater than 106 F and is characterized by hot/dry skin, absence, of sweating, warm flushed skin, seizures, unconscious, delirious

Heat Stroke

35

what are some interventions for hyperthermia?

physical cooling (warm air spray, cooling blankets, ice packs, iced gastric lavage) and teaching for prevention

36

core body temperature below 96.8 F

hypothermia (physiologic mechanism of hypothermia is excessive heat loss, heat production does not = heat loss, impaired hypothalamic thermoregulation

37

temperature fluctation between hypothermia and hyperthermia

ineffective thermoregulation

38

at risk for failure to maintain body temperature within a normal range

risk for imbalanced body temperature