Endotherm vs ectotherm tables.
OCRA Biology ALevel and OCRA Biology AS Level.
H020 and H420.
OCR, OCRA Specification. Breadth and depth of biology.
Featured in Paper 1,2,3.
ENDOTHERMS ECTOTHERMS
Definition Definition
LEARN Use heat produced internally to LEARN Temperature varies with environment
maintain body temperature. and is dependant on the environment.
E.g., Birds and mammals
Behavioural responses Behavioural responses
- Endotherms use mainly physiological
responses.
- Some behavioural
Ie.
- Dormancy during periods of high Ie.
(aestivation) or low temperatures - Basking
(hibernation) - Laying on hot rocks / cool rocks
- Use of burrows/ houses/ shade - Orientation of bodies towards or away
- Methods to warm/ cool burrows from the sun
- Gaping/ wrist liking - Educe movement so that metabolic
- Humans wea clothes dependant on heat is generated
weather - Move into the water or mud
- Migration - Move to cooler/ warmer regions
- Huddling
Anatomical/ physiological responses Anatomical responses
Ie.
- Metabolic heat
- Sweating
- Vasodilation/ vasoconstriction
- Hairs standing on end
- Shivering
Large SA for cooling e.g. Elephant ears
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller ariel3. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £3.46. You're not tied to anything after your purchase.