31.10.2015

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Did you choose to have an office job because you didn’t want to do physical work that would lead to backaches, only to notice you are getting lower or upper back pain anyhow? Ergonomic Chair – Be sure to use an ergonomic office chair, even if you have to purchase it yourself.
Chiropractic Care – Seeing your chiropractor regularly is not just for resolving lower or upper back pain once it happens, but also for preventing it in the first place by keeping your body in alignment. At Optimum Wellness in Barrie, Ontario, we can help you if you want to avoid lower or upper back pain or if you need relief from it now. 3.1 Students learn to explain why the concentration of water in cells should be maintained within a narrow range for optimal function.
It follows that a fixed concentration of substrate and enzymes is necessary for reactions to proceed at an ideal rate. 3.2 Students learn to explain why the removal of wastes is essential for continued metabolic activity. 3.3 Students learn to identify the role of the kidney in the excretory system of fish and mammals. 3.4 Students perform a first-hand investigation of the structure of a mammalian kidney by dissection, use of a model or visual resource and identify the regions involved in the excretion of waste products. Renal dialysis is similar to kidney function except that essential substances passively filtered from the blood are replaced by adding them to the blood. Active animals produce considerable quantities of nitrogenous wastes that must be removed quickly.
3.7 Students learn to distinguish between active and passive transport and relate these to processes occurring in the mammalian kidney.
In the first part of the nephron after the Bowmana€™s capsule, called the proximal tubule (see below), many of these molecules are a€?pumpeda€? back into the blood vessels as they wrap around the tubule. The way the kidney filters the blood is analogous to a student tidying his desk by throwing everything onto the floor, then replacing only the materials he needs on the desk. 3.8 Students learn to explain how the processes of filtration and reabsorption in the mammalian nephron regulate body fluid composition. The material collected in the Bowmana€™s capsule then passes into the proximal tubule where selective (active) reabsorption of all the glucose, amino acids, vitamins and hormones occurs. The filtrate then passes down and up the loop of Henle in the medulla (inner) part of the kidney. The distal (distant from the glomerulus) convoluted tubule is mainly responsible for the regulation of potassium, pH (acidity) and calcium concentration in the body. From the distal tubule, the filtrate passes to the collecting tubule which joins other tubules, connects to the ureter and transports the urine to the bladder. 3.9 Students learn to outline the role of the hormones, aldosterone and ADH (anti-diuretic hormone) in the regulation of water and salt levels in blood.
You will know that tea and coffee increase the amount of urine produced - they are diuretics. Sense organs in the pituitary gland detect falls in osmotic pressure caused by a reduction of blood volume.
A range of other sensors (including stretch receptors in the atria of the heart) detect falls in blood pressure due to dehydration and loss of salts from the blood. Aldosterone and ADH are both hormones that increase the reabsorption of water and sodium ions from the filtrate in the tubules of the nephron. 3.11 Students learn to define enantiostasis as the maintenance of metabolic and physiological functions in response to variations in the environment and discuss its importance to estuarine organisms in maintaining appropriate salt concentrations.
Work extra hard and reduce your social activities so that you can maintain your standard and avoid getting into trouble with parents or teachers?
Do the same amount of work as usual and keep up your social life but tolerate the lower assessment ranking and criticisms you are bound to get? Estuaries are places where the salinity of water changes during the day as the tides move in or out.
If you can handle these concepts, it would be in your interest to find out the meaning of the words a€?osmoregulatorsa€? and a€?osmoconformersa€? so that you can improve the quality of your answers to questions on this dot point. 3.12 Students analyse information from secondary sources to compare and explain the differences in urine concentration of terrestrial mammals, marine fish and freshwater fish. Marine fish have no trouble getting enough minerals - the oceana€™s water is full of minerals.
Freshwater fish have the opposite problem - water tends to move into their cells by osmosis and minerals tend to diffuse out. 3.14 Students process and analyse information from secondary sources and use available evidence to discuss processes used by different plants for salt regulation in saline environments.
3.15 Students perform a first-hand investigation to gather information about structures in plants that assist in the conservation of water. 3.16 Students learn to describe adaptations of a range of terrestrial Australian plants that assist in minimising water loss. In the photograph of an Acacia sp seedling below, you can see that the first leaf to form was a bipinnate (compound) leaf. In the next photograph, the leaves of a Casuarina sp (She-Oak) are shown to be reduced to tiny brown scales - the stems are acting as leaves. The leaves of Banksia serrata have a thick cuticle (Cu), tough sclerencyma (tough support tissue Sl) and most obviously, stomates in deep pits which have many hairs.
3.A A  Plants and animals regulate the concentration of gases, water and waste products of metabolism in cells and in interstitial fluid.
Osmosis and diffusion are passive - no energy is required from the organism.A  Active transport requires the expenditure of energy. In the first part of the nephron after the Bowmana€™s capsule, called the proximal tubuleA  (see below), many of these molecules are a€?pumpeda€? back into the blood vessels as they wrap around the tubule.A  This process requires energy because the materials must pass against a diffusion gradient.
The material collected in the Bowmana€™s capsule then passes into the proximal tubule where selective (active) reabsorption of all the glucose, amino acids, vitamins and hormones occurs.A A  Most of the mineral ions and water are also reabsorbed here.
It is important to keep the volume and salt concentration of blood at a constant level.A  The hormones aldosterone and ADH (anti-diuretic hormone) control blood volume and salt concentration.
You will know that tea and coffee increase the amount of urine produced - they are diuretics.A  ADH and aldosterone do the opposite - they reduce the volume of urine produced by the kidney.
2.Do the same amount of work as usual and keep up your social life but tolerate the lower assessment ranking and criticisms you are bound to get? Organisms that live in aquatic environments have the same a€?choicea€?.A A  If the water becomes more or less salty than usual, they can either work hard to maintain homeostasis or they can tolerate the change (and compensate in some way - just like you might keep a low profile). Freshwater fish have the opposite problem - water tends to move into their cells by osmosis and minerals tend to diffuse out.A  As a result, to help overcome these problems, freshwater fish produce large volumes of very dilute urine.
This dot point will be (has been) covered in practical lessons.A A  Refer to your Practical Record Book. The leaves of Banksia serrata have a thick cuticle (Cu), tough sclerencyma (tough support tissue Sl) and most obviously, stomates in deep pits which have many hairs.A A  The hairs slow the movement of air and hence reduce the rate of water loss from the pits and hence from the stomates. One size does not fit all, so don’t order one from an online source, as you need to test drive your chair to make sure it works for you. Your chiropractor can also advise you about posture-improving exercises and other ways to keep in optimal health.


Give us a call for an appointment, and one day soon, calling your job a “pain” can be a figure of speech instead of reality! If you do not read Chapter 2 thoroughly before you read this chapter, you probably will not be able to properly diagnose your machine!!!!5-1 BASIC OPERATIONThe old-style GE design uses a single-speed reversing motor, which is belted to the transmission. There are a number of ways your job could be causing you lower or upper back pain, but the good news is that there are steps you can take to avoid this. The seat should be wide enough to leave at least one inch on each side of you when you are seated. If your employment doesn’t allow you to leave your desk, at least stand and do some stretching in place for a minute or two each hour. If you do not read Chapter 2 thoroughly before you read this chapter, you probably will not be able to properly diagnose your machine!!!!In 1995, GE began manufacturing a new washing machine. When viewed from the top, the motor turns clockwise for the agitation cycle, and counterclockwise for the spin cycle (Figure GE-1.)A simple centrifugal clutch prevents the motor from taking heavy shock loads when starting. They are commonly referred to as the "front-access" or "easy-access" machines, or simply the "new-style" GE washer, versus the "old-style" machine. The chair should have lumbar support and be adjustable, so that you can sit at the right height relative to your desk and computer monitor. Having proper posture when sitting at your desk will cut down on the chances for lower and upper back pain, so take care to sit properly. A good chair makes this easier, but you will still need to remember to keep your back straight, your feet flat on the ground, your shoulders squared, and your chin parallel with the floor. The basket is attached directly to the transmission, which itself spins during the spin cycle.
There is less chance of chipping or scratching the finish.2) Inside the lid, on the top right side, is the recirculation nozzle. When the motor stops or reverses, a brake attached to the bottom of the transmission engages, keeping the transmission from turning during agitation.
Flexible fins on the agitator circulate water in the tub and through the self-cleaning lint filter in the basket hub. One of the features is that the drive motor does not drive the pump. The drain pump in these machines is a separate unit with its' own motor. The suspension in these machines is reported to be VERY good.
There is a small inspection hole (figure GE-4) in the pump body that weeps water when the pump's internal seal is leaking. In one videotaped demo I saw, they put eight pounds of phone books in the machine during the spin cycle and the thing barely vibrated.
You may not see any water directly, but you will see its tracks leading down the pump body. In fact, if the washer is dancing around during the spin cycle, whoever installed the machine probably forgot to remove the suspension rod, inserted to keep the tub from moving during shipping. See section 5-4 on pumps. 2) These washers are quite different from others in that the tub is attached to the cabinet, rather than the transmission. The washer will not agitate, drain or spin with the lid open. 2) There is a pre-pump function built into the water level switch. The water level must be quite low before the water level switch will allow the basket to start spinning. Most of the parts on these machines are designed to be thrown away.
It can develop leaks, or even shake loose, causing a MASSIVE leak (during the fill cycle, the water dumps straight onto the floor instead of filling the tub). The triangle bracket that holds it on is a separate item and is very difficult to get off the hose.
Usually such holes will appear around the top of the tub.If you have holes worn in the tub, you can sometimes patch them with an epoxy patch kit, available at your appliance parts dealer. Replace the pump. Another common complaint is that water mysteriously leaks during the agitate cycle.
It may prove to be a temporary repair, but you can always do it again, and it's cheaper than trashing the washer.
What is happening is that the lower transmission ball bearings are worn so the brake is not engaging fully. The basket then spins during the agitate cycle and and slings water over the edge of the tub. As of this writing, it is not yet widely available, but ask your dealer or call 800-936-5282. 4) The tub fittings may leak. If you detect a leak from the tub drain or other tub fitting, remove the basket as described in section 5-6. 5) You may get a calcium or detergent buildup around the fill or recirculation nozzle.
If it turns easily by hand but won't drain the tub, replace the whole pump and motor assembly.
Replace it as described in section 5-4. If the machine is not pumping out water because the coupling has come off the pump, check the pump for jamming.
Besides the fact that bleach is very hard on plastic and rubber parts, such as the hose itself, the hose chafes on one of the suspension rods until a hole develops.
Therefore, a locked transmission will not stop the motor from turning, but a locked pump will. 1) If NOTHING on the machine works, and it's not even making any noise, check the power supply.
In others, only the spin cycle is interlocked, and the machine will still fill and agitate with the lid raised. Check as described in section 2-5(a) and tighten or replace as described in section 5-10.3) Often a sock or something has jammed in the pump.
You will also hear the motor trying to start, then tripping off by the motor overload switch, because it is being stalled by the pump. The problem here is that the clutch pulley is pressed together and the top half of it comes off. An additional confirmation of this diagnosis is that if you look at the pump coupling while the motor is trying to start, it will be twisted tightly.
See section 5-4. 4) If the transmission pulley is turning, but either agitate or spin or both are not working, the transmission is bad.
Obviously the machine does not agitate or spin. Another problem experienced, though it doesn't appear to be a widespread problem yet, is that there have been some transmission failures. Replace as described in section 5-13. If the pump is turning, but the transmission drive pulley is not turning, stop the washer and disconnect power.
The symptom is that you attempt to remove the agitator, and the whole agitator shaft comes out with it. If the transmission pulley will not turn in one or both directions, the transmission needs to be replaced.
Replace the whole transmission and brake assembly as described in section 6-5.6-3 CONSOLETo access the timer, temperature or water level switches, fill valve, or to remove the cabinet top, you must remove the console. See section 5-13.If the transmission pulley turns fairly easily by hand, but the clutch drum is turning slowly or not at all under motor power, the clutch may be bad. You can then pull the terminal blocks off the timer and any other switches in the console and set it aside.The fill valve is accessible on the left.
They have a little tab in the middle that you can grab with a pair of needlenose pliers to remove and clean or replace them. Unlike switchblocks of the past, the selector switches and water level switch are not held in place by screws.
Usually you will hear the motor buzzing as it tries to start, then dropping out on the overload.


Check as described in section 5-12. 6) If the washer spins but does not agitate, check the agitator splines. Section 5-5. 7) If you have a two-speed machine and the slow (gentle) speed is not working, the clutch solenoid may not be working. To remove it, pull it until the timer clicks into the "run" position, then reach behind it with a flat screwdriver and poke the clip off. See section 5-11. If the machine makes a squeaking noise, especially during the spin cycle, the snubbers are probably worn out. The front panel of these machines is held in place by two spring catches at the top, and rests on two tabs at the bottom. This is especially true if the machine has difficulty balancing during spin, even after you redistribute the clothes. Replace the snubber blocks as described in section 5-14.5-4 PUMP AND PUMP COUPLINGA vast majority of GE-built washers use the pump shown in figure GE-4. If so, physically turn the transmission until there is clearance. The whole clutch comes off in one piece as shown in figure FA-6 and is replaced as a unit.
Disconnect the pump coupling at the TOP end, then the remove the three pump mounting screws.
They contain springs, but they also seal and compress air, much like an air shock on a car. Then cut out the little piece of plastic in the center of the hub with a knife; this will expose the top of the agitator shaft. Remove the 5 screws holding on the backsplash and lift it off; the fill valve will come with it. Remove the screws from the dampening straps (four rubber straps at the top of the tub.) If you are going to be removing the transmission, remove the agitator and basket. There are locking tabs that you must twist to remove the larger agitator from the smaller one. Once the screw is removed, the "handwash" agitator should lift out easily. Note that besides holding the agitator, the air bell contains air to keep water away from the transmission oil seal. So the O-ring on the bolt that holds the air bell in place is an important air seal and must be in good shape. There is a special slugging spanner wrench to remove these nuts; unfortunately, they're not cheap.
If you need to remove it, it is simply clamped to the transmission top and to a lip on the tub by two big round clamps. If it has simply shaken loose and not torn, you can just clamp the old one back in place, but you'd better check the snubber blocks as described in section 5-14 to try to find out why it shook loose in the first place.
If the timer dial prevents you from removing the timer, pull off the spring clip from behind the timer knob as shown in figure GE-10. It's a little easier. Down below in the tub area, disconnect the pressure switch tube from left side of the tub, and bleach hose if installed.
The other design is known as a "clamshell" timer because of the curved shape of its plastic housing. Then lift the tub and tilt it either forward or backwards to remove it from the cabinet. Pop off the eight clips holding on the tub crown. If your timer is defective, take it to your parts dealer and ask for a rebuilt.5-8 LID SWITCHThe lid switch is located beneath the cabinet top, towards the right rear of the washer. Note that three sides of the crown have forks that fit over knobs on the side of the tub, so it can only go on one way.) Remove the basket and the split ring and washer underneath it from the top of the transmission casing. Test with an ohmmeter and replace if defective.5-9 WATER LEVEL SWITCHThe water level switch is located beneath the console. Note that the ribs on the pulley stick upwards. The lower bearing assembly is now accessible. GE washers used several different wiring schemes, so refer to section 2-6(b) and compare with figure GE-11 to determine which terminals to test.
A rebuild kit is available for (at the time of this writing) about $75, with the special tools necessary available for about $50 more. See section 6-6 to rebuild.To remove the transmission, cut the cable tie holding the overflow pipe to the motor platform. Remove the four bolts holding the motor platform to the transmission, and the four bolts holding the platform to the tub. If it has no continuity, replace by removing the screw on the underside of the coil. I do not recommend the novice trying to rebuild a two-speed clutch.
To service the single-speed clutch, first remove power from the washer and remove the back panel. Using the handles of a pair of pliers, pop it out from the inside of the tub and press a new one in by hand.6-6 REBUILDING THE LOWER BEARING (Figure FA-8)There is a bearing kit to replace the lower bearing. Several different pulley hubs are included in the bearing kit; each is a different thickness. There are metal guages and instructions also included in the bearing kit. There's also a set of special tools to change it out. If you're not sure if the shoes can be re-used, ask your appliance parts dealer, or simply replace them. As you look at the back of the machine, you will find the relay towards the upper left side of the machine. You should now see good continuity. If you do not get the above readings, replace the relay.
Slide the transmission towards the right rear of the washer, and reach under the transmission to make sure the drive belt has disengaged from it. Rebuilt GE transmissions are a standard item at most parts stores, and they are not terribly expensive. Locate the right rear bolt loosely in its hole, then the left front bolt, then the other four. Install the boot, basket, and agitator.
As a final step, remove the back from the washer and make sure the belt is seated properly.5-14 SNUBBER BLOCKSThere are eight friction pads, commonly known as snubber blocks, which help to prevent vibration during the spin cycle. If it turns easily by hand but won't drain the tub, replace the whole pump and motor assembly. There is a small inspection hole (figure GE-4) in the pump body that weeps water when the pump's internal seal is leaking. It may prove to be a temporary repair, but you can always do it again, and it's cheaper than trashing the washer. If it has simply shaken loose and not torn, you can just clamp the old one back in place, but you'd better check the snubber blocks as described in section 5-14 to try to find out why it shook loose in the first place. If you're not sure if the shoes can be re-used, ask your appliance parts dealer, or simply replace them.



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