Warming And Cooling

Question 1

Vasodilation in response to a high temp

Answer 1

Artérioles dilate which allows more blood to enter the capillaries in the skin

Question 2

Pilote région in reaction to a high temp

Answer 2

Pilli erector muscles relax which lowers the hairs/feathers on the skin so that air can circulate. This allows for convection and evaporation

Question 3

Sweating in response to a high temp

Answer 3

Glands secrete sweat onto skin, where it evaporates and takes heat from the body

Question 4

Gulag fluttering in reaction to high temp

Answer 4

Increases heat loss through the mouth. Occurs in birds where they rapidly flap membranes in throat to increase avaporation

Question 5

Panting in reaction to high temp

Answer 5

Panting is a process of evaporation of water from the nasal passages, mouth, lungs. This method is used by mammals reptiles and birds

Question 6

Behavioural changes in reaction to a high temp

Answer 6

Stretching out the body gives a larger surface area for heat loss, animals may seek shade

Question 7

Vasoconstriction in reaction to a low temp

Answer 7

Aterioles constrict so less blood flows to the skin

Question 8

Piloerection in reaction to low temp

Answer 8

Pilo muscles contract causing hairs or feathers on the skin to be raised , traps a layer of insulating air, reducing heat transfer from the skin, moulting also helps

Question 9

Shivering in reaction to a low temperature

Answer 9

Muscles contract and relax rapidly and cause heat to be produced by friction and respiration

Question 10

Brown adipose tisssue in reaction to low temp

Answer 10

Cells take fat through to the mitochondria to generate heat

Question 11

Behavioural changes in reaction to a low temp

Answer 11

Curling up causes a smaller surface area for heat to escape