StudentShare solutions
Triangle menu

Respiratory Function - Lab Report Example

Extract of sample
Respiratory Function

It protects the body against disease-causing organisms and toxic substances inhaled with air". (Encarta 2005)
Using several instruments and random sampling method for smokers, non-smokers and asthmatic person, the respondents are being measured with their adult lung volumes using a spirometer. The peak expiratory flow rate is also measures as well as the respondents vital capacity using a vitalograph.
The aim of this practical is to introduce the student to measuring human lung volumes, together with observing the control of respiration. Respiration refers to the overall gaseous exchange between the atmosphere, blood and body cells. In this context, respiration is taken to mean the movement of air into (inspiration) and out of (expiration) of the lungs. More accurately, inspiration and expiration is termed ventilation. An inspiration followed by expiration is called one respiration. The number of respirations per minute gives the respiratory rate (RR). A healthy adult averages a respiratory rate of between 12 to 18 respirations per minute. During this respiratory process, various amounts of air are exchanged between the lungs and the atmosphere. These amounts of air are referred to as lung volumes, which can be recorded using a spirometer, or a peak flow meter which is a measuring instrument used to know the vital capacity of lungs.
Respiration is controlled by the levels of carbon dioxide (CO2) in the blood. Chemoreceptors within the arterial system detect CO2 levels and this information is relayed via afferent nerves to the central nervous system. High CO2 levels in the blood (hypercapnia) leads to increased respiratory rates (hyperventilation). Low CO2 levels (hypocapnia) leads to respiration rates which are slow and shallow. This is termed hypoventilation.
Spirometric tests and peak expiratory flow are the tests used primarily to assess lung function (Laszlo 1991, p311). There are many other tests involved in assessing lung function, some of which will be undertaken during this practical session, along with consideration of the homeostatic control of respiration.

This study is conducted randomly by examining smokers, non smokers and asthmatics. Vitalograph and spirometer are the instruments used to measure the Forced vital capacity, Forced expiratory volume and Peak Expiratory Flow and Vital capacity of the respondents.

Effects on smokers and non smokers:

It was observed that both women who are non smokers have low readings in Forced vital capacity, Forced expiratory volume and Peak Expiratory Flow.

In checking the inspiratory reserve volume and expiratory reserve volume, normally, the volume of air that comes out is almost similar to what a person exhales.

Table 3 shows the result of each person's Predicted PEF, Vitalograph PEF and Peak flow rate. Rob being the youngest attained the highest measurement of the three key result areas.

When the respondents were checked with regards to the amount of poison that they are carrying from their blood, it was expected and observed that non smokers have lesser findings compared to smokers. Significantly, the presence of poison that is ...Show more


The respiratory system is composed mainly of the lungs, airways, diaphragm, windpipe, throat, mouth, and nasal passages. The portal of entry of air is in the nasal cavity. The primary function of the respiratory system is to supply the blood with oxygen in order for the blood to deliver oxygen to all parts of the body…
Author : bradleywintheis
Respiratory Function essay example
Read Text Preview
Save Your Time for More Important Things
Let us write or edit the lab report on your topic
"Respiratory Function"
with a personal 20% discount.
Grab the best paper

Check these samples - they also fit your topic

Respiratory physiology
Vital capacity of male and female was compared and the effect of partial pressure of carbon dioxide in the inspired air along with the effect of hyperventilation on breath holding limit was also measured. Carbon dioxide is one of those factors whose presence in the inspired air directly relates to the respiratory rate and tidal volume.
3 pages (750 words) Lab Report
The Role of Amino Acid R-groups to the Structure and Function of Ligand-Protein Complexes
Introduction There are 20 basic amino acids, which have their molecular structure and bonding. Their rate to front also differs and varies from one amino acid to another. The best procedure used in differentiating amino acids is by determining their rate to front, which is mainly established through the process of chromatography.
4 pages (1000 words) Lab Report
Pulmonary ventilation, spirometry and pulmonary physiology
The experimental values with respect to tidal volume, vital capacity, inspiratory capacity, inspiratory reserve volume, expiratory reserve volume and the total lung capacity were similar to the personal predicted values. Residual volume and Functional Residual Capacity were much higher as compared to the predicted values.
10 pages (2500 words) Lab Report
The effects of enviromental temperature on human respiration
This also raises the risk of heart attack. According to Sun, a professor at Florida University, “Everyone should bear in mind that cold
3 pages (750 words) Lab Report
HCL gas detection by using manual air sampling pump
Since then, a numerous number of tubes have been developed for a broad range of chemicals. The introduction of OSHA regulations in the work place in 1970s, the chemical compounds, have expanded from the mostly inorganic, toxic compounds to include large
5 pages (1250 words) Lab Report
The Role of Amino Acid R-groups to the Structure and Function of Ligand-Protein Complexes
This process is also distinguished by the intensity of colors on the chromatogram. The main factors responsible for folding and stability of amino acids are the existence of non- covalent bonds and intermolecular interactions that might be
4 pages (1000 words) Lab Report
Assignment 3: Laboratory Report
Maintain the temperature throughout this activity. The water should feel quite cold, but not uncomfortable. A cardiovascular system is a network of vessels consisting of the heart, blood
8 pages (2000 words) Lab Report
Cell Fractionation and Mitochondrial Function
cleus; what does not sediment at this speed is then placed in a clean tube and spun at a higher speed to separate out the next-larger particles – in this case, the mitochondria. The particles which have sediments, forms a pellet in the bottom of the tube (or on the lower side
2 pages (500 words) Lab Report
Respiration & Circulation
Circulation is movement of blood through the blood vessels in the body to and from the heart. Both components are related in that CO2 is a waste product that has to be eliminated from the body through the process of respiration. Other waste products such as dead
5 pages (1250 words) Lab Report
Oscilloscope and Function Generator
A function generator, on the other hand, produces a voltage signal that varies with time. Clearly, the functions of these two instruments are related,
1 pages (250 words) Lab Report
Hire a pro to write
a paper under your requirements!
Win a special DISCOUNT!
Put in your e-mail and click the button with your lucky finger
Your email
Comments (0)
Click to create a comment