In 1922, Gasser and Erlanger used an oscilloscope to show the electrical signals from muscles. Electromyography (EMG) is a technique for evaluating and recording the electrical activity produced by skeletal muscles. EMG is performed using an instrument called an electromyograph, to produce a record called an electromyogram. An electromyograph detects the electrical potential generated by muscle cells when these cells are electrically or neurologically activated. The signals can be analyzed to detect medical abnormalities, activation level, or recruitment order or to analyze the biomechanics of human or animal movement.
Name__Katelyn Devries_ 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 localized, and travel short distances along the membrane.
NT1310 Unit 6 Assignment 1: Cable Tester The three cable testers I would choose would be the optical loss test set and test kit, the Time-Domain Reflectometers (TDR), and the tone generators. The Optical Loss Test Sets and Test Kits is a useful tool in a lab or for testing patch cables, two separate devices would be needed to test a permanently installed link because you have to connect the light source to one end of the cable and the power meter to the other. You need both an optical power meter and a light source in order to properly install and troubleshoot a fiber-optic network, and you can usually save a good deal of money and effort by purchasing the two together. You will thus be sure to purchase units that both support the wavelengths and power levels you need and that are calibrated for use together. You can purchase the devices together as a single combination unit called an optical loss test set (OLTS) or as separate units in a fiber-optic test kit.
Duties and Responsibilities for being an ultrasound technician are very interesting but also demanding. For example, preparing patients for procedures by taking a patients history and answering any questions about the procedure. Record findings and also keep track of patient’s records. Also have to apply a gel to aid the sound waves’ ability to show the inside of the body. Recognizing the difference between normal and abnormal Images.
83 b. What was the average exercising systolic BP? 83 c. The range of normal resting diastolic BP for these patients was 75–85 mmHg. Did diastolic BP increase, decrease, or not change with
In an MRI machine the gradient magnets create ‘image slices’ of whichever part of the body is being scanned. A certain part of the body can be selected and focused on simply by changing the gradient magnet slightly. The coil is made for different parts of the body that are being scanned, and can be made for shoulders, knees, elbows, ankles and various other parts. The part of the body that is being imaged will be next to the coil. The coil is the part of the machine that will actually make it work, by giving of a radio frequency.
Finally I will determine which of these three times intervals account for the exercise induced changes in the R-R interval. During the normal cardiac cycle, there is a sequential contraction of the atria and the ventricles, followed by a period of relaxation as the heart fills with blood. Since these sequential contraction are initiated by an action potential, the action potential must first take place in all atria fibers, and then in all ventricular fibers. This synchronous electrical activity in so many cardiac muscle cells produces currents that can be monitored with electrodes placed on the skin; the resulting recording is called electrocardiogram, or ECG. The human ECG consists of five waves, which are expressed as the P-Wave, the QRS complex, and the T-Wave.
P4- Explain the Physiology of two named body systems in relation to energy metabolism in the body. In this essay I am going to be explaining how energy is made in the body and two body systems that help to produce this energy. “The metabolic systems are responsible for the chemical reactions within the body. These reactions are involved in the maintenance of the living organism and may be involved in reactions that break compounds down catabolic reactions or reactions which build compounds up anabolic reactions”. (King R 2012) They all require energy to work.
The latter two losses are dependent on the type of exercise and the type of muscle fibers being used (fast-twitch or slow-twitch). For an overall efficiency of 20 percent, one watt of mechanical power is equivalent to 4.3 kcal per hour. For example, one manufacturer of rowing equipment calibrates its rowing ergometer to count burned calories as equal to four times the actual mechanical work, plus 300 kcal per hour,[2] this amounts to about 20 percent efficiency at 250 watts of mechanical output. The
Magnetic Resonance imaging is accomplished through various measurements of this movement of the nuclear magnetic field. MRI contrast media are used to improve the visibility of internal body structures. These contrast agents alter the relaxation times of atoms within the body tissues. The most commonly used compound of contrast