Class Notes (835,309)
Canada (509,088)
Psychology (3,518)
PSY100H1 (1,627)
Lecture 3

Lecture 3 - PSYB64.odt

3 Pages
100 Views
Unlock Document

Department
Psychology
Course
PSY100H1
Professor
Matthias Niemeier
Semester
Fall

Description
Lecture 3 ➢ Neurons and Glia (cells that make up the brain)  Neuron (piece of tissue of the cell)  Neural membrane (skin = think of our skin) &Cytoskelelton provides the neuron's shape (think of our bones)  Neuron membranes separate intracellular fluid from extracellular  Along this membrane is where we get changes in potential  Components : Cell body (soma), Axon, Dendrites (coming off the cell body)  Ion chanels • ions can only go through ion chanels • sometimes they're closed and sometimes they're open, sometimes they're specific letting certain ions to come through and others not to come through • different ion channels on a neuron membrane.  Phospholipid layers on neuron membrane • studed with proteins  We have ion pumps • difference btwn this and the channels, is that channels allow • if you have more ions than on inside there needs to balance. Ion channels focus on concentration inside and outside • Pumps are different and require energy and they pump out and in against the ion concentration.  Cytoskelelton • 3 main components used for transporting molecules that may be needed at the axon terminals or cell body • size is the difference btwn the components • Microtubule (small) • HELD in place by a molecule called Tau • sometimes we can get a breakdown (it may disconnect from microtubule due to phosphates?) • Microtubules collapse and form Neurofilliary tangles =Alzheimer's Disease • If it continues to be broken down = neuronal death • Neurofilament (larger...transporting larger stuff) • Microfilament (largest) • Can transport to cell body or axon terminal  Components  Cell body (soma) contains nucleus and other organelles (phone)  Dendrites: branches that serve as locations at which info from other neurons in received (listening to someone talk ; receive info) • Info comes into dendritic spines (stick out of the dendrites) • Infant with mental retardation: spines are coming out (immature)  Axon: carry neural messages to other neurons; very in diameter & length, vary on whether they are covered in myelin or not. • Passing on info from one cell to another (all have axons and dendrites) • Communicate
More Less

Related notes for PSY100H1

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit