Summary
Summary Intro to nervous system
- Course
- Biology
- Institution
- 12th Grade
Summary Biology (high school)
[Show more]
Seller
Follow
Content preview
Lecture 10Major aspects of Nervous system
- Sensory input
- Integration
- Processing
- Major output (response)
Main cell types in the NS
- Neurons – cells that communicate, via electrical impulses with other neurons or other
tissues
- Neuroglia – cells that support, nourish, protect and insulate neurons
- Neurotransmitters – chemical messengers in a synapse that convey an electrical
impulse from a neuron to another cell
Nervous system organization
- CNS
o Made up of the brain and spinal cord
o Responsible for integration of information and decision
making
- PNS
o Made up of cranial and spinal nerves that connect the
CNS to the rest of the body
o Contain sensory (afferent) and motor (efferent)
o Somatic NS – control voluntary skeletal
o Autonomic NS – controls involuntary effectors
Neurons
- Contains a cell body, tubular cytoplasm-filled dendrites and axon
o Cell body – contains mitochondria. lysosomes, Golgi,
chromatophilic substance, neurofilaments and a large
nucleus
o Dendrites – conduct impulses toward the cell body; short
and branching; can have more than one
o Axon – conducts impulses away from the cell body; arises
from a thickening extending from the cell body call the axon
hillock
Myelin sheath
- Larger axon enclosed by myelin sheaths -> fatty sheet
- Narrow gaps in the myelin sheath are called nodes of Ranvier
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 sharonlok1028. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for CA$9.35. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75057 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now