Question

In context of thermoregulation, which statement is FALSE?

a) Surface area increases roughly linearly with age, until development is complete

b) Heat dissipation is dependent on surface area

c) A hot climate is a challenge for animals with a small surface area/mass

ratio

d) Weight/mass increases as the square of height

e) The surface area /mass ratio of a male with SA=2.10m2, height=1.88m

and weight=81kg, is approximately 259 cm2/kg

Answer 1

Answer:

In context of thermoregulation, which statement is FALSE?

• a) Surface area increases roughly linearly with age, until development is complete - FALSE (Different formulas have been developed to relate body surface area with weight and age. This relationship is not linear as can be seen from several such formulas that are used to determine body surface area BSA)

  Du Bois formula:

  BSA = 0.007184 × W^0.425 × H^0.725

  Mosteller formula:

  BSA = 0.016667 × W^0.5 × H^0.5

  Haycock formula:

  BSA = 0.024265 × W^0.5378 × H^0.3964

  Gehan and George formula:

  BSA = 0.0235 × W^0.51456 × H^0.42246

• b) Heat dissipation is dependent on surface area - Correct (there is direct relationship between surface area and heat loss)
• c) A hot climate is a challenge for animals with a small surface area/mass ratio - Correct - large animals face more issues with hot climate compared to small animals)
• d) Weight/mass increases as the square of height - Correct
• e) The surface area /mass ratio of a male with SA=2.10m2, height=1.88m and weight=81kg, is approximately 259 cm2/kg - Correct (surface area = 21000 cm2, weight = 81kg, ratio = 21000/81 = 259 cm2/kg)