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Description:
AP Biology 3.5 Free Energy and Molecular Building Blocks. What is a dog's panting an example of?
Transcript
- 00:00
Thank you We sneak And here's your shmoop du jour
- 00:05
Brought to you by poppy's Sometimes you really need thio
- 00:09
keep him on a short leash All right dogs do
- 00:12
not possess sweat glands So in order to regulate their
- 00:14
body temperatures they pant This is an example of what
Full Transcript
- 00:18
and hear The potential answers are positive Negative feedback in
- 00:21
a minute All right Well a fino typical variation simply
- 00:24
put refers to the variability and few types that exist
- 00:27
in a population It's Why a box or is much
- 00:29
larger than a chihuahua and the nose of a collie
- 00:32
is way way longer than that of a pug So
- 00:36
answer See is not what we're looking for A genetic
- 00:39
mutation is a permanent alteration in the dna sequence that
- 00:42
makes up by jean Bye Bonzo here has one blue
- 00:45
eye and one green eye When why the chinese crested
- 00:47
dog is hairless But genetic mutation is not the reason
- 00:51
why dogs pant when they're hot So the answer d
- 00:54
try Try again Now think of a feedback mechanism is
- 00:57
a siri's of checks and balances within an organism When
- 00:59
a dog's temperature rises its blood vessels dilate in the
- 01:03
sweat plans begin to secrete a fluid all is well
- 01:06
and good except for one tiny detail Because we mentioned
- 01:08
before dogs do not have sweat plans so this positive
- 01:11
feedback mechanism cannot kick in to cool down our canine
- 01:13
friends We need jake japan can't jake pants by panting
- 01:18
a dog will use the largest gay patch of its
- 01:20
mouth to eliminate internal heat and bring its body temperature
- 01:23
back down to normal The correct answer is b always
- 01:26
remember that a negative feedback mechanism works to maintain homo
- 01:29
stasis in an organism by monitoring and controlling physiological processes
- 01:34
Bottom line be grateful Humans have sweat otherwise that's not 00:01:38.048 --> [endTime] pretty
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