Nobody downloaded yet

Instrumentation in Human Bioscience - Essay Example

Comments (0) Cite this document
Summary
Body composition and expirated air analysis are two important methods used to determine a subject's potential for good health. Body composition, the measurement of fat content, is a method used to determine the difference between being overweight and over-fat…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER92.4% of users find it useful
Instrumentation in Human Bioscience
Read TextPreview

Extract of sample "Instrumentation in Human Bioscience"

Download file to see previous pages A discussion of the methods reveals that all have their advantages as well as their disadvantages.
The Skinfold Caliper is the most widely used method to determine the amount of body fat. It uses a set of mechanical calipers to measure skinfold thickness at key points on the body. The measurements are then referenced to a chart, which infers the percent of body fat. Though the tools are simple, inexpensive, and relatively non-invasive, the procedure requires a high degree of training to obtain reliable results. The typical accuracy of a correctly administered Skinfold measurement is plus or minus 3 percent (Doyle 1998). This is a marked increase over the universal Body Mass Index (BMI), which compares height to weight and results in an accuracy of 5 to 6 percent. (FitnessGram 2003).
A more recent addition to the available methods is the use of the Bioelectrical Impedance Analyser (BIA). This instrument operates on the principle that fat retains less water than muscle. The increased percentage of water in muscle makes it a better electrical conductor and by measuring a body's resistance to current flow, we can measure the body's fat content. This non-invasive technique is well suited for a wide range of subjects including elderly and disabled. The measurement is fast, easy to use, and is able to be used with a minimum of training due to a direct electronic readout. The cost is comparable to the Skinfold calipers and the accuracy obtained is similar to the Skinfold method. However, to attain this accuracy care must be taken to void the subject of alcohol, urine and other liquids for up to 48 hours prior to administering the test (Doyle 1998). These variables all have the potential to impact the accuracy negatively.
A more recent method to measure body fat is Dual Energy X-ray Absorpitometry (DEXA). DEXA is a low-level x-ray that measures not only muscle and fat, but also uses bone mineral content as a factor in body composition (Doyle 1998). The technique uses a safe level of x-ray radiation, is non-invasive, and the subject requires no preparation. Though DEXA is costly and requires a high degree of training, it's accuracy exceeds both the Skinfold and BIA methods (Doyle 1998).
In measuring the potential for good or diseased health one must also consider and analyse the expired air of the subject. Through measurement of the CO2 and O2 components of expired air, calculations can indicate a healthy metabolic function or detect areas of concern with respect to the subject's overall fitness and health (Jacobs, Mintz, and Nash 1999). The method of assessment most commonly used is known as Indirect Calorimetry (Measuring Energy Expenditure). The method involves the collection of expired air over a given time period and the subsequent analysis of the CO2 and O2 components. The method has some variations in the collection apparatus as well as the means used to analyse the gases.
The Douglas Bag is a direct method used to collect expired air. It is considered to be clumsy, due to it's 200-litre bag size, and interferes with the subject's activity while under test. Air is sampled for approximately 10 minutes and then the gas is measured in a dry gas analyser (Messer, Pelto, and Pelto 1989).
A less bulky apparatus used to collect expired air is the K.M Respirometer. Smaller and more portable than the Douglas bag, it has gained popularity and is a more widely used method. The technique of ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Instrumentation in Human Bioscience Essay Example | Topics and Well Written Essays - 750 words”, n.d.)
Instrumentation in Human Bioscience Essay Example | Topics and Well Written Essays - 750 words. Retrieved from https://studentshare.org/science/1519408-instrumentation-in-human-bioscience
(Instrumentation in Human Bioscience Essay Example | Topics and Well Written Essays - 750 Words)
Instrumentation in Human Bioscience Essay Example | Topics and Well Written Essays - 750 Words. https://studentshare.org/science/1519408-instrumentation-in-human-bioscience.
“Instrumentation in Human Bioscience Essay Example | Topics and Well Written Essays - 750 Words”, n.d. https://studentshare.org/science/1519408-instrumentation-in-human-bioscience.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document

CHECK THESE SAMPLES OF Instrumentation in Human Bioscience

Human Bioscience

...coating that surrounds the protein capsule when the virus is outside a living cell (Lawrence et al. 2009). Viruses are usually very small and can’t be seen by optical microscope. Antibiotics have no effect on viruses and in many cases treatment is only supportive, but there are several antiviral agents that are effective to some viruses (Magden et al. 2005) (Witthoft et al. 2007). Bacteria on the other hand are single cell organisms that are able to live and replicate using their organelles. There are bacteria that constitute the normal flora in the human organism, located in the gut, respiratory system, skin etc. It is estimated that there are 10 times more bacteria in the human organism than there are...
5 Pages(1250 words)Essay

Human Bioscience

...Human Bioscience From a study of registered nurses' conceptions of the physical science underlying their clinical practice, it was d that understanding of the physical sciences is inadequate. This inadequacy was in terms of the competencies required of them as nurses (Wilkesand Batts, 1998). The changing patterns of health care delivery have amplified the complexity in all practice environments. As a result, nurses are unable to forecast what activities make a difference in the outcomes and satisfaction levels of their patients. This failure to identify and control the processes, procedures, models, services, and responsibilities related to safe, compassionate care deliverance and better health outcomes...
2 Pages(500 words)Essay

Instrumentation Systems

...K.S.Preeti, ID 21824 Order Number: 256963 Instrumentation Systems 6th December 2008 Instrumentation Systems & Signal Conditioning Introduction to Instrument Systems: An instrumentation system is an aggregation or assembly of devices united by some form of regular interaction or interdependence. It is a group of diverse units or devices so combined to form an integral whole and to function, operate or move in unison, and often in obedience to some form of control. (Sawhney 1521) The various components of a typical process control instrumentation system include process, sensors or transducers, signal conditioners, transmitters, receivers and display. In recent times, this entire loop has been computerised, initiating the need... of...
4 Pages(1000 words)Essay

Human Bioscience

...the bronchioles into the alveoli. Gas exchange occurs in the alveoli. There are about 300 million alveoli running to about 160m2 area. Lungs expand when there is increase in the volume of thoracic cavity. During inspiration, there is contraction of the external intercostal muscles which lift the ribs up and out and there is contraction of the diaphragm which draws the ribs down. During expiration, these processes are reversed. The elastic recoil of the lungs makes them to come back to their resting volume. At rest, a normal adult human being breathes about 15- 18 times exchanging 500ml of air each time. Chronic bronchitis and emphysema To diagnose a patient as having chronic bronchitis, the patient must suffer from...
5 Pages(1250 words)Essay

Instrumentation

...Hall-Effect Semiconductor Sensors and Section # of TABLE OF CONTENTS Introduction 2. The Hall-Effect Phenomenon 3. In Situ Hall-Effect Sensor 4. Drive System with Hall-Effect Sensor 5. Magnetic Micro bead Detection 6. Hall-Effect Sensors in Trackball Sensing 7. Space Shuttle Hyperbolic Thrusters 8. Hall-Effect Pressure Devices 9. Hall-Effect Photo Sensor 10. Split-Drain MOS Devices LIST OF FIGURES Reference Title Page Ramsden, Edward. (2006). Hall-effect Sensors. Second Edition. Burlington. Newnes. Figure 1 - The Hall-effect in a conductor 1 Ali, A. Et al. (2008). “A new contactless trackball design using Hall Effect sensors.” Institute of Petroleum Engineering, Heriot-Watt University. Figure 2 - Schematics of one... Semiconductor Sensors...
6 Pages(1500 words)Lab Report

Human Bioscience

...Order No 430694 Human Bioscience 28.4 The Answer of Question no As per the question where the case study begins with the infection of the virulent stain of Tripudiovirus and there are three specific terms associated with it. These terms are as follows- 1. Seroprevalence 2. Endemic 3. Morbidity 1. Seroprevalence is the terminology that is chiefly associated with the HIV/AIDS Infection. It means “The frequency of individuals in a population that have a particular element as antibodies in their blood serum” is the definition as per Marrium-Webstar online Dictionary. This means that in certain group of population where the study conducted with the degree of presence of a certain group of virus is called as...
6 Pages(1500 words)Essay

Professtional Practice in Bioscience

..., evidence of work rights in Australia, a copy of my academic transcript, and the contact details of three professional referees, as needed. I would be available for any required examination or interview at your most convenient time. My contact numbers are thereby indicated in the attached curriculum vitae for your perusal. I would be looking forward to hearing from you soon. I am confident that if chosen for the position, my inclusion to your prestigious organization would exemplify a symbiotic relationship as I look forward to being an instrumental contributor to your Cell Signaling Unit in the near future. Thank you. Very truly yours,  Address Telephone, Mobile Phone Number Email Address CAREER OBJECTIVE To work... as a...
2 Pages(500 words)Assignment

Instrumentation and Control

...Instrumentation and Control Question a) Answer A graph of output at 200C (mV) versus input mass(Kg). Static transfer function refers to the ratio of system output in steady state to system input in steady state and describes the input-output relationship when the input and output are not changing. Therefore taking an input mass of 5Kg with an output of 14.34mV, Therefore static sensitivity = (b) Answer Non-linearity refers to the deviation from the linear relationship between the input and output values. Between 0 to 1 Kg output changes by 3.5mV, Between 1 to 2 Kg output changes by 2.86mV, Between 2 to 3 Kg output changes by...
8 Pages(2000 words)Speech or Presentation

Human bioscience

...HUMAN BIOSCIENCE Human Bioscience Introduction Maintenance of the pH of the blood is an important process which has to be regulated strictly by the human body. The normal blood pH ranges from 7.35 to 7.45 and deviations from the normal range can lead to hazardous outcomes as the functions of the body are very sensitive to the pH. A blood pH which is below 7.2 has serious consequences such as reduced growth, a decline in cardiac output, resistance to insulin; a lower than normal blood pressure and raised blood potassium levels (hyperkalemia). On the other hand, a pH above 7.6 leads to low calcium in the body causing tetany and abnormalities in the hearth...
6 Pages(1500 words)Essay

Instrumentation

...INSTRUMENTATION Affiliation INSTRUMENTATION Instruments are the devices that are used in the measurement under study. It provides for the data dispensation, testing and designing of the outcomes (Vogt, 2006). Hence, for our research we decided to use questionnaires that were presented to all the sales consultants selected and the managers. Since the sample size was relatively high, the criterion proved to be more appropriate both in cost and effectiveness. And to make our research more predictive, we had predictive devices that help us to find out other unrestricted responses that the participants were not willing to provide to us. For purposes of accuracy, we carried out reliability and...
1 Pages(250 words)Assignment
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Essay on topic Instrumentation in Human Bioscience for FREE!

Contact Us