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Bio204
Lecture 7 - Berta
11
Biology
Undergraduate 3
12/14/2010

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Cards

Term
Constraints on structure and function
Definition
1. Phylogeny
2. Size
3. Mechanical
4. Environment
Term
Muscle - Types and which is evolved in locomotion
Definition
-Skeletal, Smooth and Cardiac
-Only Skeletal is involved in locomotion
Term
Levers - How it works, most common class, and example
Definition
-Position of inforce and out force relative to pivot (Joint)
-3rd class lever - most common
-Flexion at elbow joint
Term
How increase velocity (speed)
Definition
-Move muscle closer, increase out-lever lengthen limb to segment
Term
Increase Force
Definition
-Move muscle further from joint, decrease the out lever, shorten limb segment
Term
Reduce number of lower limb elements in contact with the ground... 3 types
Definition
-Plantigrade - Soles
-Digitigrade - Fingers and toes
-Unguligrade - Tips of toes
Term
Saltation - What is it and what are its benefits
Definition
-Hopping
-Thrust: Lengthened hindlimbs, short forelimbs
Term
Brachiation
Definition
-Arm Swinging
-Elongate forelimbs and hands forming hooks
-Fingers curved
-Best developed in some primates
Term
Scansorial or Aboreal
Definition
-Climbing
Term
Who has active flight
Definition
-Only birds and bats
Term
Bat Flight vs. Bird Flight
Definition
-Bat flight memebrane supported by greatly elongated 2-4 digits vs. birds
-Bats: Retain mobility of joints of hand and fingers - more control
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