Skin and Temperature Control Flashcards Preview

Dermatology > Skin and Temperature Control > Flashcards

Flashcards in Skin and Temperature Control Deck (20):
1

What factor cause core body temperature to vary?

External temperature
Activity
Circadian rhythm
Menstrual cycle

2

What detects body temperature?

Peripheral thermoreceptors
Central thermoreceptors

3

Where are peripheral thermoreceptors found in the body?

Skin, especially in face, scrotum

4

Where are central thermoreceptors found in the body?

Spinal cord
Abdominal organs
Hypothalamus

5

How is heat generated in the body in response to cold stress?

General metabolism
Voluntary muscular activity
Shivering thermogenesis
Nonshivering thermogenesis

6

How is heat loss from the body reduced in response to cold stress?

Vasomotor control
Behavioural responses

7

What is hypothermia?

A fall in deep body temperature to below 35C

8

Who is at risk of cold stress?

Neonates
Elderly
Vagrants
Cold store workers
Outdoor pursuits
Offshore workers

9

What is the treatment for cold stress?

Dry/insulate to prevent further heat loss
Slow re-warming (bags, blankets, hot drinks, warm air)
Fast re-warming (immersion in water, extracorporeal circulation)

10

What vascular effects occur due to cold stress?

Vasoconstriction
Increase in viscosity
Promotes thrombosis
Causes anoxia

11

How is heat production minimised in response to heat stress?

Decreased physical activity
Decreased food intake

12

How is heat loss from the body increased in response to heat stress?

Vasomotor control
Sweating
Behavioural responses

13

What is heat exhaustion?

Body temperature raised in range 37.5-40C

14

What are the symptoms of heat exhaustion?

Headache
Clammy skin
Confusion
Nausea
Profuse sweating
Tachycardia
Hypotension
Weak pulse
Fainting and collapse

15

How is heat exhaustion caused?

Disturbance of the body's fluid/salt balance due to excessive sweating

16

What is heat stroke?

Body temperature raised above 40C

17

What are the symptoms of heat stroke?

Hot dry skin
Circulatory collapse

18

Who is at risk of heat stress?

Neonates
Elderly
Physical work in hot humid environments
Workers wearing non breathable protective clothing

19

What is the treatment for heat stress?

Move to cooler environment
Remove clothing
Fan
Sponge with tepid water
Give fluids (oral, IV)

20

What causes fever

Endogenous pyrogens (interleukins 1 and 6)