1) Based on what is presented in the article, what is (are) the most significant failing(s) of
journalists in reporting science and what could they do differently to redress the problem(s) you
Problem: The most significant failing of jour
Propagation and Integration of Electrical Signals
Propagation of action potential
The main purpose of action potentials is to carry information swiftly and reliably along an axon. How
does the action potential propagate?
(1) At the point alon
Introduction to Neurobiology
Neurobiology is an interdisciplinary eld, devoted to gaining an understanding of the nervous
system using techniques from many different elds including medicine, biology, psychology,
physics, chemistry, and mathemat
The are three major classes of neurotransmitters:
(1) low molecular weight molecules (Classic neurotransmitters), including amino acids, biogenic amines,
The major excit
Changes in the strength of a synapse;
Changes in the size of a post synaptic potential seen in response to the same presynaptic stimulus.
Although the purposes and consequences of most forms of sy
Course information for NPB 100, Fall 2014
NPB 100 is designed to give students a foundation in Neurobiology. The course is
designed for those who already have a solid background in biology, chemistry and
physics; students without this background will need
Sample exam I NPB 100, Fall 2014
At which point(s) in this action potential is the
cells membrane more permeable to potassium
than it is to sodium?
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Question 2. Ouabain is a toxin that prevents the
Neurons communicate with each other at synapses. For chemical synapses, the rst step in this interneuronal
communication is the release of neurotransmitter from the presynaptic terminal.
Characteristics of transmitter relea
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The activation or deactivation of ion channels is responsible for all electrical signaling in the nervous
system. In order to understand the function of ion channels, it is very helpful to know the structure.
Communication between neurons in the nervous system often requires that messages travel long
distances down axons without loss of information. Neurons use action potentials to do this.
(1) The action potential is a brief, tra
Information in the nervous system is carried by electrical signals in neurons.
There are two main types of electrical potential:
(1) graded electrical potential: seen post-synaptically and in sensory receptor cells where informat
Resting Membrane Potential
A neuron at rest has a steady electrical potential across its membrane, with the inside of the cell being
negative with respect to the outside. Before we can understand how electrical signaling works in the