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PNB 2250- Core Temperature Regulation Exam Study Guide $11.49
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PNB 2250- Core Temperature Regulation Exam Study Guide
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PNB 2250- Core Temperature Regulation Exam Study Guide Large animals - Ans:-heat is lost and gained slowly so on a hot day the animal never deviates much from core temperature -Doesn't need to replace heat as quickly -only needs to eat 25% of body weight Small animals - Ans:--Heat is gained a...

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  • October 24, 2024
  • 22
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • pnb 2250 core temperature regulation exam study g

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  • PNB 2250
  • PNB 2250

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©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




PNB 2250- Core Temperature Regulation
Exam Study Guide


Large animals - Ans:✔✔-heat is lost and gained slowly so on a hot day the animal never deviates much

from core temperature


-Doesn't need to replace heat as quickly


-only needs to eat 25% of body weight


Small animals - Ans:✔✔--Heat is gained and lost quickly


- Has to eat as much as 4 times the body weight each day to maintain heat


Dinosaurs - Ans:✔✔-Core temperature ranged from 32-43 degrees celsius


Were able to keep core temperature above environmental temperature


-endothermy or gigantothermy


-Reached the reproductive competency prior to adult size- like reptiles


Dinosaurs continued - Ans:✔✔-Many dinosaurs had feathers


Page 1/22

, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




--> helped regulate core temperature


-Likely homeothermic if with wings


- No wings= ecto/heterotherm


-feathers evolved scales


Factors that affect core temperature - Ans:✔✔--Environment- Heat loss/gain via conduction, convection

or radiation (aquatic vs. terrestrial)


-Tissue placement- Heat throughout an animal body is not consistent--> affected by distance from

surface, blood flow


Counter-current - Ans:✔✔-- The arrangement of blood vessels within the periphery of the body can

dramatically save heat loss or prevent heat gain


-Veins/arteries are parallel and next to each other


Specific Heat capacity - Ans:✔✔-Amount of heat required to raise the temperature of raise the kg of any

substance 1 degree


-k= energy (joules)/mass (change in temperature)


-K is the ability of materials to transfer heat


-Materials vary in the amount of heat required to change their core temperature

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, ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED

FIRST PUBLISH OCTOBER 2024




Specific heat capacity continued - Ans:✔✔-•A higher ! is an indication of the rapid transfer of


heat


•Materials with low ! are effective insulators


◦ Feathers, fat, skin


•k can be changed by


reducing blood flow to the


skin surface, posture (fetal


position), changing skin,


hair in feather coloration


Peripheral Vasodilation - Ans:✔✔--Blood vessels carry heat from within and out the surface


-If the blood vessels are prevented from bringing blood to the surface- decreases heat loss


External factors - Ans:✔✔--feathers, scales, skin thickness etc.


-environment, season activity


affects Hcr, Hr, and He



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