New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

Week 4- Synapse and Nervous/Sensory Systems

by: BettyAnn Mead

Week 4- Synapse and Nervous/Sensory Systems Biology 152

Marketplace > University of Massachusetts > Biology 152 > Week 4 Synapse and Nervous Sensory Systems
BettyAnn Mead
GPA 3.6
Biology 152

Almost Ready


These notes were just uploaded, and will be ready to view shortly.

Purchase these notes here, or revisit this page.

Either way, we'll remind you when they're ready :)

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

Biology 152
Class Notes
25 ?




Popular in Biology 152

Popular in Department

This 3 page Class Notes was uploaded by BettyAnn Mead on Friday February 13, 2015. The Class Notes belongs to Biology 152 at University of Massachusetts taught by Peteh in Winter2015. Since its upload, it has received 60 views.


Reviews for Week 4- Synapse and Nervous/Sensory Systems


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 02/13/15
Synapse Place where synaptic terminals of one neuron come into contact with another neuron Presynaptic Cell Action potential in presynaptic cell Depolarization of presynaptic membrane Voltagegated calcium channels open In ux of calcium ions Synaptic vesicles fuse with presynaptic membrane Neurotransmitter is released from vesicles by exocytosis Synaptic Cleft Neurotransmitter diffuses across synaptic cleft Neurotransmitter removed from synaptic cleft Postsynaptic Cell Neurotransmitter binds to receptors in membrane Ion channels coupled to the receptor open Membrane potential changes 0 Change can be depolarizing excitatory 0 Change can be hyperpolarizing inhibitory Electrical change in postsynaptic neuron as a result of binding of neurotransmitter to receptor is called 0 Excitatory Synapse Excitatory Postsynaptic Potential EPSP Open gated channels that allows sodium to enter and potassium to exit 0 Inhibitory Synapse Inhibitory Postsynaptic Potential IPSP Open gated channels that allows chloride to enter and potassium to exit Temporal Summation Generated from a single neuron repeatedly Spatial Summation A sum of multiple neuron signals Sub Threshold DO NOT reach threshold NO ACTION POTENTIAL Types of Synapses Neuron to neuron Neuromuscular Neuron to gland General Characteristics of Neurotransmitters Most neurons release only one neurotransmitter but some may release two or more 0 More than 100 neurotransmitters are known Neurotransmitters may be synthesized in the axon terminal or in the cell body and then transported In either case the synthesizing enzymes are made in the cell body Blockers Drugs or poisons that block receptor Reuptake Blocker Blocks the neurotransmitter from connecting to receptors Evolution of Nervous System Vertebrate Neurons Voltagegated channels 0 Unidirectional transmission 0 Chemical synapses Evolutionary Sequence 0 Ion channels gt Voltagegated channels 0 Bidirectional gt Unidirectional Electrical junctions gt Chemical synapses The Brain 0 CNS Organization Highly organized into tightly integrated funcUonalsubun s Wrinkles increase surface area and connections Emergence of cephalization cephala head Vertebrates develop three brain regions 0 Hindbrain o Midbrain o Forebrain Thinking and decision making Forebrain became important in mammals Somatomic Voluntary Autonomic Nonvoluntary Sympathetic Parasympathetic Transduction Transformation of one type of energy into electrical impulses in nervous system 0 Sensory receptor Transducers Types of Sensory Receptors Mechanoreceptors Pressure touch motion and sound 0 Pain Receptors Excess heat pressure chemicals released from in ammation 0 Thermo Receptors Cold and hot interoreceptors for temperature to anterior hypothalamus Chemoreceptors Solute concentration as well to speci c molecules Photoreceptors Sensory receptors in the eyes that respond to photons of light energy Interoception Sensory processes having to do with conditions outside the body Exteroreception Sensory processes having to do with conditions outside the body Gravity 0 Motion


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."

Anthony Lee UC Santa Barbara

"I bought an awesome study guide, which helped me get an A in my Math 34B class this quarter!"

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"

Parker Thompson 500 Startups

"It's a great way for students to improve their educational experience and it seemed like a product that everybody wants, so all the people participating are winning."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.