Class notes

Biol 105 Sensory Systems Notes

0 purchase

Course
Bio 105

Institution
Queens College

This is a comprehensive and detailed note on Chapter 44; sensory systems for Biol 105. *Essential Study Material!! *For you, at a price that's fair enough!!

[Show more]

Preview 2 out of 15 pages

View example

Uploaded on September 7, 2024
Number of pages 15
Written in 2021/2022
Type Class notes
Professor(s) Prof. karl fath
Contains All classes

bio 105
biol 105
general biology
biology
general
cell biology
queens college cuny
new york
new york city
sensory
system
class notes
fall
spring
summer
winter
semester
document
city
lecture notes

anyiamgeorge19 Member since 1 year 33 documents sold

$7.99

Also available in package deal from $118.99

Add to cart

Add to wishlist

100% satisfaction guarantee
Immediately available after payment
Both online and in PDF
No strings attached

Also available in package deal (1)

Biol 105 Massive Package Deal

$ 196.50 $ 118.99 20 items

1. Class notes - Bio 105 - exam 1 lecture notes
2. Class notes - Bio 105 exam 4 preparatory notes
3. Summary - Biol 105 ap gene regulation study guide
4. Class notes - Biol 105 lab 3; histology notes
5. Class notes - Biol 105 easy to follow lecture 1 notes
6. Summary - Biol 105 test 1 study guide
7. Class notes - Biol 105 chapter 41 notes
8. Class notes - Biol 105 chapter 47 notes
9. Class notes - Biol 105 mammalian nervous system notes
10. Class notes - Biol 105 neurons, glia, and nervous systems notes
11. Class notes - Biol 105 cell communication notes
12. Class notes - Biol 105 sensory systems notes
13. Class notes - Biol 105 chapter 12 notes
14. Class notes - Biol 105 cell cycle and cell division notes
15. Class notes - Biol 105 dna and it's role in heredity notes
16. Class notes - Biol 105 chapter 42 notes
17. Class notes - Biol 105 chapter 49 notes
18. Class notes - Biol 105 circulatory system notes
19. Summary - Biol 105 chapter 9-12 quiz study guide
20. Summary - Biol 105 midterm exam prep study guide
Show more

Ch 44: Sensory Systems

44.1 Sensory Receptor Cells Convert Stimuli into Action Potentials

 Sensory receptor cells (sensors or receptors) transduce physical and
chemical stimuli into neural signals

 Sensory transduction begins with a receptor protein that opens or closes
ion channels in the membrane, changing the membrane potential (receptor
potential)

 Sensory receptor proteins respond to stimuli by directly or indirectly opening
or closing ion channels

 The receptors may be ion channels themselves (thermoreceptors and
mechanoreceptors)

2+
 Electroreceptors respond to depolarization by opening voltage-gated Ca
2+
channels, and the Ca triggers neurotransmitter release

 Chemoreceptors and photoreceptors influence ion channels indirectly by
activating G proteins and second messengers

 Some sensory receptor cells are organized with other cells in sensory
organs, such as eyes and ears.

 Sensory systems include sensory cells, associated structures, and neural
networks that process the information.

 Sensory adaptation: diminishing response to repeated stimulation.

, o Enables animals to ignore background conditions but remain sensitive
to changing or new stimuli

44.2 Chemoreceptors Respond to Specific Molecules

 Chemoreceptors: receptor proteins that bind to specific molecules, their
ligands

o Responsible for taste and smell

o Also monitor the internal environment, such as CO levels in blood
2

 Olfaction: sense of smell

o Olfactory receptors are neurons in the nasal cavity

o The dendrites extend as olfactory cilia on the surface of the nasal
epithelium.

o The axons extend through holes in the overlying bone and into the
olfactory bulb in the brain

 Odorant: molecule that binds to a specific olfactory receptor protein on the
cilia of olfactory receptor neurons (ORNs).

o Odorant binding to a receptor activates a G protein, which activates
the second messenger cAMP .

o cAMP binds to cation channels in ORN’s membrane, causing an influx
of Na and generating an action potential.

 Pheromones: chemical signals used to communicate among individuals of
the same species.

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 anyiamgeorge19. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $7.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

68175 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling

Class notes

Biol 105 Sensory Systems Notes

Document information

Subjects

Written for

Seller

Reviews received

Content preview