the worksheet ( see below). Submit your answers as a word document to the Week 4 dropbox 1. Define a reflex and list the components of a reflex arc. The reflex arc is the nerve pathway involved in a reflex action including at its simplest a sensory nerve and a motor nerve with a synapse between. The components are receptor‚ sensory neurons‚ motor neurons‚ relay neurons‚ and effector. 2. Describe the events of an action potential. The events that take place are that the motor neuron will
Premium Action potential Neuron Neuromuscular junction
Abstract This article is investing the effects of speed of the action potential across many neurons through investigating two diseases and performing related lab simulations. Multiple sclerosis and epilepsy are the two disease which are investigated and through the use of Neurons in Action lab simulations‚ we saw the effects that demyelination and channelopathy can have. As my hypothesis guessed‚ demyelination is the main cause of multiple sclerosis and channelopathy is the main cause of epilepsy
Premium Neuron Nervous system Parkinson's disease
Exercise 3: Neurophysiology of Nerve Impulses Worksheet Assignment Due: Week 4 Student instructions: Follow the step-by-step instructions for this exercise found in your text and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus. Eliciting a Nerve Impulse Activity 1: Electrical Stimulation 1. Do you see any kind of response on the oscilloscope screen? Just a flat line. 2. What was the threshold voltage
Free Action potential Axon Nerve
Exercise 6: Cardiovascular Physiology Worksheet Assignment Due: Week 6 Electrical Stimulation Activity 1: Direct Heart Stimulation 1. Did you see any change in the trace? I did not see a change in the trace 2. Why or why not? This is because it needs more stimulation 3. Did you see any change in the trace? I did see a change in the trace 4. Why or why not? This is because there is double stimulation. 5. Describe the change you see in the trace. How does it differ from the baseline
Premium Parasympathetic nervous system Acetylcholine Nervous system
Exercise 3: Neurophysiology of Nerve Impulses Worksheet Eliciting a Nerve Impulse Activity 1: Electrical Stimulation 1. Do you see any kind of response on the oscilloscope screen? No there was no response‚ the line was flat 2. What was the threshold voltage‚ or the voltage at which you first saw an action potential? 3.0V 3. How does this tracing compare to the one that was generated at the threshold voltage? At 3.5V the high & low peaks were just slightly above and below respectively
Premium Nervous system Neuron Brain
In this paper‚ “VTA CRF neurons mediate the aversive effects of nicotine withdrawal and promote intake escalation” describes how the multiple researchers‚ such a Grieder‚ Herman...George‚ hypothesized that drug addiction is driven by two mechanisms. One of the mechanisms is the Ventral tegmental area (VTA)‚ which is part of the brain that is rich in dopamine and serotonin neurotransmitter and is part of the two major reward pathway. The other mechanism is Corticotrophin-releasing hormone (CRF)‚ which
Premium Drug addiction Addiction Dopamine
In 1992‚ Giacomo Rizzolati discovered mirror neurons in macaque monkeys. Mirror neurons are cells that fire when you are focused in planning a motor movement and are also fired through an observation of a similar movement in another person. The macaque monkey’s mirror neurons fired when they held a banana and also when they saw someone else hold a banana. Humans are similar to monkeys in the same aspect. The mirror neurons helps the brain by recording the difference between actions and seeing. It
Premium Brain Psychology Nervous system
Nelson Mandela Metropolitan University Character Recognition – Single Neuron WRCI 411 – Assignment 1 RXXXXX XXXXXX - 2100XXXX August 2013 RXXXXX XXXXXX – s2100XXXX WRCI 411 – Assignment 1 August 2013 Contents List of Figures and Tables ........................................................................................................................ 1 Figures ..............................................................................................................
Premium Expected value Output Input
is a neuron? o The individual nerve cell‚ comprised of the axon‚ dendrites‚ and cell body. 2. How many neurons in the nervous system? o 86 billion 3. Function of cell body‚ dendrites‚ and axons. o Cell body: Contains the nucleus and other major components. o Dendrites: Branch out from the cell body and receive messages from other neurons. o Axons: Carries messages away from the cell body to the dendrites. 4. Define polarization/depolarization. o Polarization: Resting state of neuron‚ semipermeable
Premium Nervous system Neuron Axon
! ! Activity 2.2.1: The Neuron ! Introduction You are waiting to cross the street at a busy intersection. All of a sudden‚ two cars collide right in front of you. Your hands instantaneously fly up to shield your face. You hear the horrible crunch of metal. You smell the burning rubber of tires and you open your eyes to see the skid marks on the road. Reaching for your cell phone‚ you dial 911. Your heart races as you run out in the street to see if you can be of any help. So much is happening at
Premium Nervous system Neuron