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- Path: sparky!uunet!fedfil!news
- From: news@fedfil.UUCP (news)
- Newsgroups: talk.origins
- Subject: Muscle tissue from mouse to sauropod
- Message-ID: <243@fedfil.UUCP>
- Date: 23 Jan 93 04:35:54 GMT
- Organization: HTE
- Lines: 50
-
- We've seen one poster claim that reptile muscle is twice as good as ours,
- and that this has been proven more dynamically than possible via microscope
- test. I've got three problems with this.
-
- 1. I don't picture any way for this to be done. I don't picture anybody
- training a crock to do curls or benchpresses, for instance.
-
- 2. The source I've quoted is too good and too authoritative to be dismissed
- on such grounds:
-
-
- From Knutg Nielson, "Scaling, Why is Animal size So Important",
- Cambridge Univ Press, 1984, page 163
-
- It appears that the maximum force or stress that can be exerted by any
- muscle is inherent in the structure of the muscle filaments. The
- maximum force is roughly 4 to 4 kgf/cm^2 cross section of muscle
- (300/400 kN/m^2). This force is body-size independant and is the same
- for mouse and elephant muscle. The reason for this uniformity is that
- the dimensions of the thick and thin muscle filaments, and also the
- number of cross-bridges between them are the same. In fact the
- structure of mouse muscle and elephant muscle is so similar that a
- microscopist would have difficulty identifying them except for a larger
- number of mitrochondria in the smaller animal. This uniformity in
- maximum force holds not only for higher vertibrates, but for many other
- organisms, including at least some, but not all invertibrates.
-
-
- 3. It isn't even relevant. Sauropods resembled reptiles in no way, shape,
- or manner, and may actually have been mammals or near-mammals. They walked
- with their legs under them like large mammals, as opposed to reptiles other
- than snakes, which walkin the familiar splayed manner, and their metabolism
- was, in all likelihood, warm-blooded.
-
- There is no conceivable way that any creature which eats grass and low-value
- food, and whose weight is therefore mostly digestive mechanism, is going
- to be remotely close to being as strong or capable of lifting as much weight
- as a top human power-lifter such as Kazmaier.
-
- If Kaz couldn't stand in our gravity at 70,000 lbs, then neither could a
- sauropod dinosaur.
-
-
-
-
-
- --
- Ted Holden
- HTE
-
-