Summary of the topic of hormones from Campbell Biology a Global Approach, 11th edition. This summary includes notes of accompanying MasteringBiology assignments, lectures and any lectures.
Summary of the topic of hormones from Campbell Biology a Global Approach, 11th edition. This summary includes...
Samenvatting Hoofdstuk 12 van Biology a Global Approach 11th edition
Samenvatting Hoofdstuk 8 van Biology a Global Approach 11th edition
Samenvatting Hoofdstuk 7 van Biology a Global Apprach 11th edition
All for this textbook (60)
Written for
Universiteit Utrecht (UU)
Biologie
Biologie van dieren
All documents for this subject (118)
Seller
Follow
stijnvantrijp
Content preview
The Animal Body (BOOK)
40.1
The endocrine- and the nervous system are two systems for coordinating and controlling responses
to stimuli. In the endocrine system, hormones are released by endocrine cells and released into the
bloodstream. Only cells with receptors for that hormone response the signal. In the nervous system
nerve impulses travel to target cells along communication lines
40.2
A regulator is an organism that regulate internal change in the face of external fluctuations, a
conformer allows its internal condition to change in accordance with external changes.
Homeostasis is regulated by negative- and positive feedbackloops.
homeostasis is sometimes altered by acclimatization, an physiological adjustment to changes in its
external environment.
40.3
Thermoregulation is the process by which animals maintain their body temperature within a normal
range.
Endothermic means that organisms are mostly warmed by heat generated by metabolism,
ectothermic means that organisms gain most of their heat from external sources.
An animal which body temperature varies with the environment is called poikilotherm, an animal
with a constant body temperature is called homeotherm.
Heat exchange can occur by radiation (emission of EM-waves), evaporation, convection (transfer of
heat by the movement of air or liquid) and conduction (transfer of thermal motion between
molecules of objects in contact with each other).
The integumentary system confess of the skin, hair and nails.
Blubber is a very thick layer of fat, just under the skin, which functions as insulation.
Vasodilation is the widening of superficial blood vessels, the reverse process is called
vasoconstriction. These two processes can regulate heat transfer to the environment.
Another approach to regulate/reduce heat loss relies on countercurrent exchange.
The ability of varying heat production is called thermogenesis.
Nonshivering thermogenesis is the process in which mitochondria increase their heat production
instead of producing ATP by increasing their metabolic activity. Some mammals have areas with extra
mitochondria which is called brown fat. These areas are specialized for rapid heat production.
In mammals, the sensors responsible for thermoregulation are concentrated in the hypothalamus,
which does also regulate the circadian clock.
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 stijnvantrijp. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £2.97. You're not tied to anything after your purchase.
