ATAR Notes: Forum

VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Biology => Topic started by: zhe0001 on May 26, 2013, 07:58:31 pm

Title: Thermoregulation in Whales
Post by: zhe0001 on May 26, 2013, 07:58:31 pm

Hey forum,
Currently doing Biology Unit 3.
Recently given a take home sac about thermoregulation in whales.
I'm a little bothered with the following questions - not sure if right, please give personal opinion
Q1. Discuss the structural variations - physical features a whale has to maintain thermoregulation
My response: Blubber, Reduced limb size (less surface area exposed to external environment)
Q2. Discuss the physiological changes that may occur.
Response: Circulatory System (Countercurrent heat exchange) and the thyroxine production (metabolic rate)

I know the questions say discuss, I'm just concerned whether I'm on the right track.
Let me know if I'm missing something or if something is wrong.
Thanks!! :)

Title: Re: Thermoregulation in Whales
Post by: Yacoubb on May 30, 2013, 08:53:42 am

You're on the right track. As you already mentioned, the reduced surface area of the appendages and altogether Surface area to volume ratio of the whale reduces the amount of heat that is lost and thereby allowing whales to maintain a relatively stable core body temperature.

Title: Re: Thermoregulation in Whales
Post by: zhe0001 on June 01, 2013, 02:22:09 pm

Quote from: Yacoubb on May 30, 2013, 08:53:42 am

You're on the right track. As you already mentioned, the reduced surface area of the appendages and altogether Surface area to volume ratio of the whale reduces the amount of heat that is lost and thereby allowing whales to maintain a relatively stable core body temperature.

Thanks for your help! I did the sac so hopefully I get a good result :)