Class notes
Class notes Life Sciences (Biology)
- Course
- Institution
In depth biology notes with activities and answers. Pictures and diagrams included as well examples
[Show more]
Seller
Follow
lithabo
Content preview
Responding to the environmentThe nervous system (involving nerves) and the endocrine
system (involving hormones) help us to respond to the
environment.
,Why do we need a nervous system?
Our survival depends on us being sensitive to our
surroundings. We need to be able to detect any changes in
the environment and be able to react to these changes.
A characteristic of a living organism is irritability i.e. the ability
to respond to stimuli.
The stimuli may be external (received by sense organs) or
internal (received in body by nerve endings).
This must also be able to co-ordinate the various activities of
the body.
, The Nervous system and
transmission of impulses
A nervous system is needed to:
Detect changes in the environment (both internal and
external) and to react to these changes ✔
Coordinate the various activities of the body ✔
, (voluntary actions) (involuntary actions)
(Cranial and spinal nerves)
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 or Stuvia-credit 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 lithabo. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.64. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
56326 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now