ENVIRONMENTAL CONDITIONS - COLD 1

Question 1

The body is forced to try and conserve heat. This is achieved by what list all 3 methods

Answer 1

• Piloerection
• Shivering
• Peripheral Vasoconstriction

Question 2

Explain what Peripheral vasoconstriction is

Answer 2

Is the redirection of blood flow away from the skin and towards the body’s core.

Question 3

Explain what Shivering is

Answer 3

Involuntary muscle contractions designed to help increase heat prod.

Question 4

Explain what Piloerection is

Answer 4

The hairs on the body stand on end and trap a warm layer of hair close to the skins surface to help keep the skin warm

Question 5

What happens to perfomance in the cold especially to submaximal VO2 and fine motor skills

Answer 5

• Submaximal VO2 increases, for endurance athletes shivering might make there be an early depletion of glycogen stores
• Fine motor skills will deteriorate, as the there is a reduced sensation in the handa and feet

Question 6

What is Wind Chill

Answer 6

The apparent temperature felt on the skin due to the combination of wind and ambient temperature

Question 7

Why is there a Risk of dehydration
in cold environments

Answer 7

As the air is very cold and dry, meaning a lot of fluid is lost via respiration, there is a decrease in thirst sensation leading to dehydration

Question 8

Define Hypothermia

Answer 8

Hypothermia is a potentially dangerous drop in temperature below 35 degrees usually caused by prolonged exposure to cold temperatures

Question 9

During Hypothermia

Blood vessels will *what to decrease *what thereby decreasing heat loss.

Answer 9

• Vasoconstrict
• decrease in blood flow to the skin

Question 10

Situations that can cause the body to lose more heat than it can generate include list all 3

Answer 10

• pronlonged exposure to cold, wintry conditions
• Being in cold water for a length of time
• Being out in windy weather in wet clothes

Question 11

List all 3 Body’s physiological response to cold weather

Answer 11

1. Peripheral vasoconstriction
2. Shivering
3. Piloerection