2-4: 1. What did you observe when the glass rod contacted the nerve? An action potential is generated as I touch the rod to the nerve. 2. How does this tracing compare with the other tracings you have generated? The tracing is identical to the tracing generated at the threshold voltage. 3. What did you observe when the heated glass rod contacted the nerve? An action potential is generated when you touch the heated rod to the nerve‚ through a thermal stimulus. 4. How does this trace compare
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all of the nerves that connect these organs with the rest of the body. Together‚ these organs are responsible for the control of the body and communication among its parts. The brain and spinal cord form the control center known as the central nervous system (CNS)‚ where information is evaluated and decisions made. The sensory nerves and sense organs of the peripheral nervous system (PNS) monitor conditions inside and outside of the body and send this information to the CNS. Efferent nerves in the PNS
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effects that numerous hormones and drugs have on the sample ileum’s nerves and relate this to the human autonomic nervous system. The objectives include observing the change in contractions during different levels of stimulation and inhibition‚ such as that from different voltages and alpha/beta blockers. A. RESPONSES TO NERVE STIMULATION Figure 1.0 Spontaneous contractions of rabbit ileum
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16‚ 2014 A Case of Spinal Cord Injury 1. Describe the functional anatomy of the spinal cord using the following terms: white matter‚ gray matter‚ tracts‚ roots and spinal nerves. The spinal cord consists of a superficial White matter and a deep Gray matter. The white matter consists of myelinated axons‚ which form nerve tracts and the Gray matter consists of neuron cell bodies‚ dendrites and axons. The white matter in each half of the spinal cord is organized into ventral‚ dorsal and lateral
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maximal voltage here: 6.0 V Activity 2: Mechanical Stimulation 1. When the glass rod is touching the nerve‚ what do you see on the oscilloscope screen? The nerve’s action potential to stimuli 2. How does this tracing compare with the other tracings you have generated? They are traced in the same fashion Activity 3: Thermal Stimulation 1. What happens when the heated rod touches the nerve? Action potential in increased 2. How does this trace compare to the trace that was generated with the
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malfunctions of the nerves. Disorders can range from Palsy and Parkinson’s in which symptoms are movements such as tremors to Alzheimer’s which is mental deterioration and loss of memory. Disorders stemming from the nervous system can be severe. A few disorders that deal with movement and muscles are Amyotrophic lateral sclerosis (also known as Lou Gehrig’s disease)‚ Myasthenia gravis‚ and as said before Parkinson’s. Amyotrophic lateral sclerosis is a disease of the nerve cells in the brain and
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(thoracic and abdomino pelvic) by the diaphragm‚ which is a dome- shaped muscle important in the respiratory system. • The thoracic cavity is the upper ventral cavity which contains the heart‚ lungs‚ trachea‚ esophagus‚ large blood vessels‚ and the nerves. The ribs surround the organs of the thoracic cavity. • The lower part of the ventral cavity is divided into two parts‚ abdominal and pelvic portions. • The abdominal cavity contains most of the gastrointestinal tract‚ kidneys‚ and adrenal glands
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Action Potentials in the Ventral Nerve Cord of the Periplaneta Americana Andrew Goldsmith (andrew.goldsmith@uconn.edu)‚ Tuesdays 1-4PM Section: 2 (Partner: Ana Charalambides) Abstract In polikiotherms it is known that the amount of locomotion varies based on the environmental temperature. We believe that this is caused by differences in the neural activity. We therefore investigated how temperature changes affect the extracellular neural activity in the ventral nerve cord of the Periplaneta Americana
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including muscular dystrophy‚ inflammation of muscles‚ pinched nerves‚ peripheral nerve damage (damage to nerves in the arms and legs)‚ amyotrophic lateral sclerosis (ALS)‚ myasthenia gravis‚ disc herniation‚ and others. Why is an EMG test done? An EMG is often performed when patients have unexplained muscle weakness. The EMG helps to distinguish between muscle conditions in which the problem begins in the muscle and muscle weakness due to nerve disorders. The EMG can also be used to detect true weakness
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Moorpark College Neurophysiology of Nerve Impulses Laboratory Homework 20 Points Total Name: ___________________________________ PRINT THE FOLLOWING PAGES AND PROVIDE A HANDWRITTEN ANSWER TO ALL QUESTIONS. Answer the question in the space provided for each question. 1. In the PHYSIO-EX 9.0 Activity 1‚ the simulation showed you how the resting membrane potential depends on the concentration of K+ and Na+ in the ECF. Some data were generated while measuring the resting membrane potential
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