Life with low body temperatures

  • Thread starter Thread starter willstaruss22
  • Start date Start date
  • Tags Tags
    Body Life
Click For Summary

Discussion Overview

The discussion explores the possibility of complex life forms with internal body temperatures averaging 80 degrees Fahrenheit, examining whether such organisms could survive and function normally. The conversation touches on biological, chemical, and evolutionary implications of low body temperatures, as well as hypothetical adaptations for life on other planets.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants propose that life forms with an internal body temperature of 80 degrees Fahrenheit could exist, referencing organisms with naturally lower core temperatures.
  • Others argue that lower body temperatures may lead to slower movement and reduced energy levels due to the effects of temperature on enzymatic reactions.
  • A participant questions whether different biochemical pathways could allow for more energetic life at lower temperatures, suggesting that evolution could favor such adaptations in colder environments.
  • Concerns are raised about the limitations of enzymatic function at lower temperatures, with a participant stating that lower temperatures generally result in lower reaction rates and energy interactions.
  • A later reply introduces a hypothetical scenario regarding organisms on Mars, questioning whether they could develop a natural pressure suit to cope with environmental conditions, including low pressure and radiation.

Areas of Agreement / Disagreement

Participants express differing views on the viability of energetic life forms at low body temperatures, with no consensus reached on whether such organisms could evolve or function comparably to those with higher temperatures.

Contextual Notes

The discussion includes assumptions about biochemical processes and environmental conditions that may not be universally applicable. The potential for alternative evolutionary paths in different planetary environments remains speculative.

willstaruss22
Messages
108
Reaction score
1
Could there be complex life somewhere in the universe with body temperatures averaging 80 degrees F? I am curious if life of some kind could survive a body temperature that low and function normally.
 
Biology news on Phys.org
You mean like reptiles and fish?
 
I mean creatures that have internal body temperatures of 80 degrees. Like we Humans have a constant temperature of 98 degrees and I am wondering if there can be any creature that can have a internal constant body temperature of 80 degrees F without influence from the outside?
 
As Evo pointed out there are examples of organisms that naturally have much colder core body temperatures so the answer to your question is essentially yes. Such organisms are going to be slow moving/unenergetic though.
 
From what I've seen lots of reptiles and fish move fast. You say they must move slow with a lower body temperature but if their chemistry or design is different they could be more energetic. Correct?
 
Ever seen a cold blooded animal when the environment is cold, like at night? They're quite sluggish compared to how they are in the day when the sun boosts their core body temp. To be more energetic all the time you need to have a higher core body temp so either you hang out in a warm environment constantly or you regulate your body temperature to a higher temp. Reason being that chemical reactions, especially enzymatic reactions, have optimum temperatures ranging around mid-high 30C.
 
Last edited:
Yes but could there be enzymes that react and function better in colder conditions?
Life evolved to fit in its environment on Earth. So say on another world evolution made life thrive more with lower core body temperatures. This could happen on a colder world. Right?
 
The reason enzymes don't work properly under colder conditions is a lot to do with their, and their substrate's, diffusion which will be higher at higher temperatures and thus increase the likelihood of the two colliding. In general a lower temperature means lower reaction rates in chemical reactions because of this. In addition there is the problem that at lower temperatures chemicals will not interact with enough energy to react (this is called activation energy).

So the answer is no as far as I can see, it isn't possible for a low temperature organism to evolve that is as energetic as an analogous high temperature organism.
 
Ok but I have one other question that came to mind. Can an organism have its own natural pressure suit. Where I am getting at is on Mars if a simple organism evolved into a lightly more complex organism how would it deal with its body being at or slightly higher than the triple point of water? Would this organism have its own natural pressure suit of sorts to deal with the lower pressure assuming it can deal with the radiation?

This might seem like a weird question.
 
  • #10
I guess. IIRC the reason tissue pulls apart when lacerated is due to the natural constricting effect of extra cellular matrix proteins. I can't see anything obviously unlikely with an organism with ECM that pulls tight enough to significantly increase internal body pressure.
 

Similar threads

  • · Replies 23 ·
Replies
23
Views
5K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 14 ·
Replies
14
Views
4K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 9 ·
Replies
9
Views
5K
Replies
4
Views
4K
  • · Replies 3 ·
Replies
3
Views
4K
Replies
1
Views
3K