Summary
Summary Introduction to peripheral nervous system
- Module
- Biology of disease
- Institution
- University Of Wolverhampton
Peripheral nervous system introduction
[Show more]
Seller
Follow
Content preview
PERIPHERAL NERVOUS SYSTEMSubdivided into the
SOMATIC (Movement and sensation)
AUTONOMIC
- Sympathetic (flight and fight)
- Parasympathetic (rest and digest)
THE SOMATIC nervous system:
It involves the CNS and PNS both.
Functions
- Receive sensory signal
- Integrating and processing sensory information
- Processing motor responses involving skeletal muscles
SENSORY RECEPTORS ARE CLASSIFIED BY:
POSITION:
- Exteroceptor: external environment
- Interoceptor: internal environment
- Proprioceptor: position of body in relation to the rest of the body
FUNCTION:
- Chemoreceptor: chemicals
- Osmoreceptor
- Nociceptor: pain
- Mechanoceptor: mechanic like pressure
- Thermoceptor: temperature
CELL TYPE
- Free nerve ending
- Encapsulated ending (encapsulated in
connective tissue which increase sensitivity)
- Specialised receptor cells
SOMATIC NERVOUS SYSTEM: Sensory perception
An individual or organism capable of processing the stimuli in their environment is
called to have a sensory perception. This processing is done through the
coordination between sense organs and the brain. Hearing, vision, taste, smell, and
touch are the five senses we possess.
, GUSTATION: TASTE
We have 5 distinct tastes:
1. Sweet (glucose)
2. Salty (Na+)
3. Sour (H+)
4. Bitter (Alkaloids)
5. Umami (L-glutamate)
Gustatory receptor cells in taste buds are found in raised
bumps called papillae on the tongue.
4 types of PAPILLAE:
- Circumvallate
- Foliate
- Filiform
- Fungiform
OLFACTION: SMELL
Olfactory sensory neurones detect Airborne molecules in the nasal cavity.
Signals travel along the olfactory nerve.
AUDITION: HEARING
Bones inside the ear
Vibrations are picked up by the small
structures in the cochlear
BALANCE:
SOMATOSENSATION:
Exteroception
Interoception
Proprioception
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 rabiahkhan. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £9.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67474 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now