BIO 203 Lecture Notes - Lecture 14: Mitochondrion, Maximum Force, Hamstring
16 Nov 2016
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Document Summary
Purpose search for food escape from danger look for mates. Locomotion: over the same distance traveled, a flying animal expends less energy per unit mass than an animal that runs on the ground: true, false. Locomotion: locomotion is more efficient in a fish with low body mass compared to a fish with large body mass: true, false. Major challenge is overcoming the resistance (friction) of water. Density of h2o > density of air. Use legs to push against water (e. g. , insects) Jet propulsion - suck in and squirt out water (e. g. , squid) Side-to-side movement of body and tail (e. g. , fish) Undulate body and tail up and down (e. g. , aquatic mammals) Overcoming resistance (of air) is a minor problem exception: crawling. Strong muscles and skeleton more important than streamlined shape. Movement something firm for muscles to work against. Fluid held under pressure in a closed compartment (inside body) Provides support for crawling and burrowing in terrestrial animals.
