A. Avril Crayfish Lab Report November 9‚ 2012 Dr. Marvin Results: Figure 1. Firing Rate of Tonic Receptor in Response to Stretch. The correlation between Firing Rate and Stretch of the slow adapting crayfish receptor for four different sets of data is represented in this figure. The recordings are taken at stretches of 2‚ 4‚ 6‚ 8‚ and 10 mm of the crayfish tail. The best fit lines for the different sets of data are as follows: Ali and Emily- Linear best fit line‚ Dave and Laura- Exponential
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Information * The Neuron at Rest: A Tiny Battery * The resting potential of a neuron is its stable‚ negative charge when the cell is inactive. * The Action Potential * An action potential is a very brief shift in a neuron’s electrical charge that travels along an axon. * The absolute refractory period is the minimum length of time after an action potential during which another action potential cannot begin. * The All-or-None Law * The neural impulse
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electrochemical process. Neurons pass neurotransmitters through the dendrites‚ which are attached to the ends of each neuron and receive messages from neighboring neurons. The chemical messages that are passed from one neuron to the next cause an action potential. This occurs when the receiving neuron accepts the right amount of the correct message. Once the message is received‚ the neuron will then send neurotransmitters to the next neuron through the axon. After the neurotransmitters pass through the
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EXERCISE 3: Neurophysiology of Nerve Impulses |ACTIVITY 1: The Resting Membrane Potential |Answers | |The nervous system contains two general types of cells: neuroglia cells and |C- Neurons | |nerves. |
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Name___ Unit 9 Worksheet – Membrane Potentials Each answer is worth 1 point (20 points total) To complete this worksheet‚ select: Chapter 12: Nervous Tissue Animations Introduction to Membrane Potentials 1. Describe the neuron function. Neurons act to facilitate the transfer of data amongst the body’s cells sustaining homeostasis 2. Contrast graded potentials and action potentials. Graded potentials are electrical signals that have variable amplitude‚ are
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Positive feedback - The response enhances the original stimulus so that the response is accelerated Chapter 2 Chemistry comes Alive Matter: anything that takes up space and mass Energy: capacity to do work or put matter into motion Potential (stored energy) Kinetic ( active and working energy) Elements: substances that cannot be decomposed into smaller substances Atoms: made of protons‚ neutrons and electrons
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nerve fibers or axons allowing the examination of the action potentials through the movements of the nerve. The sciatic nerve axons are different in structure and function. Axons with large diameter perform action potentials faster than axons with small diameter. The sciatic nerve has a lot of properties that make it to be a good candidate for this
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chapter 2 chapter outline module 5 Neurons: The Basic Elements of Behavior The Structure of the Neuron How Neurons Fire Where Neurons Connect to One Another: Bridging the Gap Neurotransmitters: Multitalented Chemical Couriers module 6 module 7 The Brain The Nervous System and the Endocrine System: Communicating within the Body The Nervous System The Endocrine System: Of Chemicals and Glands Studying the Brain’s Structure and Functions: Spying on the Brain The Central Core:
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What is psychology? The scientific study of behavior and mental processes Development of psychology as a science Wilhelm Wundt founded the first psychology laboratory. Student of Wudnt ’s‚ E.B. Titchner named Wundt ’s approach structuralism. William James gave field an "American Stamp‚" invented functionalism Contemporary approaches to psychology Biological Approach (focus on the body) Neuroscience Behavioral Approach (behavioral responses and their environmental determinants) Psychodynamic
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postsynaptic potential in the neuron is enough to pass the threshold for firing. There are two types of summation‚ spatial summation and temporal summation. Both types of summation are similar in that they work to strengthen the EPSP of a neuron‚ meaning they help create more postsynaptic potential so that neurons are more likely to fire. Spatial summation and temporal summation also both use an additive effect to help neurons reach the threshold to fire. The additive effect is when more action potential
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