Study Guides (248,609)
Canada (121,634)
ERTH 2401 (8)
all (2)

Lecture 22- Endothermy vs. Ectothermy .doc

4 Pages

Earth Sciences
Course Code
ERTH 2401

This preview shows page 1. Sign up to view the full 4 pages of the document.
Lecture 22 Ectothermy vs Endothermy Richard Owen coined word Dinosaurs Ectothermycold blooded eg Dimetrodon Endothermywarm blooded Ectothermy and Endothermy refer to the regulation of body temperatureEndothermic organisms regulate their body temperature internally and strive to maintain a constant temperature Ectothermic organisms regulate their body temperature externally and their body temperature responds directly to temperatures in the environment A cold blooded animal can move into the sun to heat up therefor is no longer cold blooded becoming agile and can strike Body Temperature Variation Homeothermsorganism in which the internal body temperature remains constant Poikilothermsorganisms in which the internal body temperature varies Poikilotherms Ectothermic poikilothermsmost modern reptiles Endothermic poikilothermsbatshummingbirds need to work at a high activity level and need a constantly higher body temperature Endothermic homeothermshumans Ectothermy and Endothermy are both beneficial Neither is superior Resting Metabolism Metabolismlevel of internal activity cellular respiration and burning caloriesResting metabolism level of internal activity with animal is at rest Metabolism Tachymetabolic an animal whose metabolism remains at a high leveltypical of endotherms Ectotherms cannot sustain energy for as long Bradymetabolic an animal whose metabolism slows to a low level of activity when resting Have very high activities in addition to achieving a low level of activity when resting Combo of TachymetabolicBradymetabolic Eg Bears body temp drops 45 degrees and oxygen consumption drops to 50 during hibernation
More Less
Unlock Document

Only page 1 are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


Join OneClass

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

Sign up

Join to view


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.