Flashcards in 18. Temperature Control Deck (44)
What is the advantage of being homeothermic?
Can live in cold climates as are unaffected to changes in ambient temperature
What are the disadvantages to being homeothermic?
What is the optimal internal temperature range?
What is the name for an animal that can't control its own body temperature?
What is the effect of temperatures between 40 to 44?
What causes body temperatures between 38 to 40?
What happens at temperatures between 34 to 36?
What happens at temperatures between 30 to 34?
Impairment of temperature regulation
What happens at temperatures between 27 to 29?
Where can temperature be taken from?
Rectum (.56 higher)
Where do homeothermic animals get heat from?
Metabolic oxidation of food
What is the function of the core?
Remains constant at 37.8 degrees
What is included in the core?
What is the function of the shell?
Exchange of heat depending on ambient temperature
What is involved in the shell?
What is the temperature range of the skin?
What are the 4 methods of heat transfer?
What form is heat emitted as?
Electromagnetic waves via radiation
What is conduction?
Transfer of heat between two objects of different temperatures in direct contact
What is the function of convection in heat loss?
Carries heat away from the body
Why does sweating help cool us down?
Heat is lost when water evaporates
How is temperature controlled through the vasomotor response?
Changing the width of blood vessels regulates the flow of blood in skin
What is the thermoneutral zone?
Temperature range at which core temperature is maintained constant by vasomotor responses alone
Why does humidity prevent heat loss?
Increased water concentration in the air prevents sweat evaporating
Heat cannot be lost through evaporation
What neurotransmitter is used in sweat glands?
What is the primary method of involuntary heat production?
What is shivering?
Rhythmic skeletal muscle contraction and increased tone
All energy produced is used as heat as no work is done
How much can shivering increase internal temperature?
How does piloerection promote heat retention?
Heat is trapped amongst hair