Class Notes (836,135)
Canada (509,645)
Zoology (236)
ZOO 2090 (90)
Lecture 3

lecture 3.docx

5 Pages
98 Views
Unlock Document

Department
Zoology
Course
ZOO 2090
Professor
Fred Laberge
Semester
Fall

Description
Lecture 3- biological design 10/22/2013 7:55:00 PM The 4 Physical factors 1. Size  surface cube law= If you double the size of an object, you increase the surface area four times and you increase the volume it holds 8 times ** know the relationship between small animal (higher metabolism)  measured as consumption of O2 increasing mass, reduces O2 consumption  because larger animals have organ systems that are more efficient bones have to be equally proportionate 2. allomentry- describes the changes in shape that accompany changes in size, i.e., all parts of the body are not growing at the same rate isometry- where there is proportional growth/change between all structures 3. Force  basic concepts: length, time, and mass  mass= property of matter  force= effect of body on another thru mass + acceleration *vector :  measurements that have magnitude and direction. Some muscles are built upon this principle  Second law of motion (Newton) states F = ma, where m is mass and a the acceleration experienced by an object Lever:  Muscles generate forces and skeleton applies these forces. This can be represented by torques and levers  Torque- force acting at a distance from fulcrum Stability  Sprawled limbs o Lizards: very stable, lots of force, adducter muscles needed, movement costly  Pendulous limbs o Dinosaurs + mammals: not stable, less force needed, rapid/efficient movement possible 4. Environment- land  Drag: main force o caused by the need to push fluid aside o described by the Reynolds number; a dimensionless number affected by flui
More Less

Related notes for ZOO 2090

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit