The resultant chemical mixture bathes the vestibular nerve receptors‚ leading to a depolarization blockade and transient loss of function. The sudden change in the rate of vestibular nerve firing creates an acute vestibular imbalance (ie‚ vertigo). The physical distention caused by increased endolymphatic pressure also leads to a mechanical
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with the receptors on the motor end plate‚ known as sarcolemma which is a muscle fiber that mirrors the synaptic bulb. (5)ACh grabs onto the receptor causing Na+ to enter the muscle fiber. This also allows K+ to exit the muscle fiber which causes depolarization and the production of an action potential. Muscle contraction takes place when the fibers pull on the endomysium which pulls on the perimysium which then pulls of the epimysium to cause the contraction to take place. There are seven steps involved
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Huntington’s disease (HD) is an autosomal dominant neurodegenerative disease for which there are currently no treatments that slow or halt its progression(1) The cardinal early features of the disease are movement disorders‚ including chorea and incoordination‚ and later on‚ dystonia‚rigidity‚ and bradykinesia become more prominent.Patients die usually between 15 and 25 years after development of the first symptoms.(2‚3‚4) Brains from patients with HD show neuronal degeneration‚most prominently in
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Human Anatomy and Physiology 260 - Midterm 1 Cardiovascular Anatomy Arteries: • Carry Blood from the heart to the tissues • Gradually decreasing in size of vessels o Arteries - Transportation of red blood cells away from the heart o Arterioles - Smaller‚ lead from the arteries to the capollaries o Capillaries - Gas exchange (tissue level) • 3 layers of wall: o 1. Tunica Adventitia (Tough outer layer) o 2. Turnica media (Middle smooth muscular layer‚ changes the diameter of the blood
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Complete the chart of participants of the sliding filament theory: Number the statements in the proper sequence to describe excitation-contraction coupling. Step 1 has been numbered for you. ___1____ 1. Acetylcholine is released by the axon terminal‚ diffuses to the muscle cell and attaches To ACh receptors on the sarcolemma. ________ 2. The action potential‚ carried into the cell via the T-tubules‚ causes the SR to release Calcium ions. ________ 3. Ach-E breaks down
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normal scale would lose. Based off of the GSD curve we can then calculate the Coefficient of Uniformity (Cu) and the Coefficient of Curvature (Cc). These coefficients are the standards in the USCS to classify if a soil is poor or well graded. How well a soil is graded determines how well the soil will compact for foundations. Test Procedure: Lab Procedure followed - ASTM D422 The American Society of Testing and Materials (ASTM) is widely used and highly trusted procedure system. ASTM D422
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Stroke Pathophysiology Sid Shah‚ MD Pathophysiology of Stroke Sid Shah‚ MD Page 2 of 14 Stroke Pathophysiology Introduction The two major mechanisms causing brain damage in stroke are‚ ischemia and hemorrhage. In ischemic stroke‚ which represents about 80% of all strokes‚ decreased or absent circulating blood deprives neurons of necessary substrates. The effects of ischemia are fairly rapid because the brain does not store glucose‚ the chief energy substrate and is incapable of anaerobic
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do the following wave forms reflect? a. P wave _____atrial depolarization____ b. QRS complex ___ventricular depolarization_____ c. T wave ___ventricular repolarization_____ Cardiovascular System: Cardiac Action Potential 1. How do the waves of depolarization‚ generated by the autorhythmic cells spread to the muscle cells? _____via gap junctions______ 2. Depolarizing current from the autorhythmic cells causes the ventricular muscle cells to ___contract___. 3. If the sodium channel or the fast calcium
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LAB PORTION In-Class Labs Answer all questions within the Lab A comparison of the OSI and TCP/IP models Unit 3 Lab 3.1: Network Reference Models In-Class Activity‚ Graded Course Support Tools/Resources required for this activity: page 58-60 Computer lab Linksys wireless router(s)—1 or 2‚ depending on class size USB wireless NICs—one for each student Overhead projector Printer Richardson lab manual Description: Before beginning the labs‚ set up the wireless network just as you
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Terms | Definitions | Explan why the larger waves seen on the oscilloscope represent ventricular contraction | the ventricle contraction is of greater force than the atrial contraction‚ this is due to the fact that ventricle’s fxn is to send blood throughout the body. | Explain why the amplitude of the wave did not change when you increased the frequency of the stimulation in cardiac muscle. | amplitude does not change because the cardiacs long refractory period prevents summation. | Why is
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