Respirometer Experiment

This experiment involved three treatments and a control. The goal of the experiment was to see how different levels of NaCl affect the rates of cellular respiration in day-old pinto bean seedlings. In this experiment the rate of cellular respiration was measured by the amount of CO2 in ppm per gram of substance produced by a given treatment group or the control over the course of ten minutes. CO2 levels were measured using a CO2 sensor. The sensor was given time to warm up then placed in a glass chamber with a sample from one of the treatment groups or a sample of control. CO2 levels in ppm were collected every four seconds for ten minutes by the sensor. The data was divided by the weight of the sample used to generate it, to give the respiration rate per gram of sample. The data was then graphed and the slope of the line of best fit for the data points was found. The slope of the line of best fit for each treatment was determined and represented

As stated in the background of the lab, "seeds are considered to be in a period of dormancy, where they metabolize stored energy at a very slow rate while the seed is still considered alive" (Hands On Labs). During germination, the developing plant embryo uses the stored food supply in the seed for cellular energy and growth. Thus, cellular respiration is taking place as the seeds grow. Without water the seeds cannot begin germinating thus the seeds in test tube N did not undergo photosynthesis(Hands On Labs).

the seeds that microwave for 5, 10, and some of the 15 second seeds will grow. The radish seeds

In this lab I will be exploring how temperature impacts the rate of osmosis by placing pieces of potato of equal size in solutions of different temperatures and observing the change in mass of potato after a given period of time. The change in mass will indicate the rate of osmosis.

Human error played a factor because it was not made sure that air was trapped in each bag. In the class data the amount of seeds germinated on day three was higher than the amount of seeds germinated on day four. This is not possible as the amount of seeds germinated cannot decrease, rather they should stay the same or increase. A seed cannot go from being germinated to not being germinated. This could have occurred from miscounting or not accurately counting the number of seeds germinated. If the experiment was completed again, more higher concentrations could be applied to the seeds to see if the data is further supported. Either way the more trials the better and more accurate results, this applies to any experiment. Practical applications of the principles of this investigation may be using the correct concentration for a specific plant or seed. This lab shows that it is necessary to follow the directions and specifications when using the fertilizer miracle

The importance of the experiment is to determine the effects temperature has on beet cell membranes, and to understand why certain cells are best suited for certain environments or in this case certain temperatures. Cell membranes play a vital role in selectively allowing substances such as proteins, nutrients, and other chemicals into and out of the cell. The cell membrane is also a line of defense against harmful chemicals and other agents that try to enter the cell. We hypothesize that increasing the temperature will increase the fluidity of the membrane thus making it less permeable. When the temperature of the cell increases it will cause the phospholipids that make up the plasma membrane to move apart from one another and become more

The authors exposed seedlings to two different Carbon dioxide levels, soil temperature, and light conditions for one growing season. The two Carbon dioxide levels were 392 µ to a 784 µ , the two soil temperature was 17 and 22 degrees Celsius, and the two light conditions were 100% and 30% of the original 100%.

The following graphs show the results of this experiment. The tetrahymena sample that was introduced to concentrated tobacco had a lower cell/vacuole ratio than the tetrahymena sample that was not exposed to

The cotton would go into the top of the machine and with an individual turning the handle it would go through a series of wired teeth that combed out the seeds. After the seeds are taken out, the cotton would be pulled out of the machine. Comparative to the one pound of cotton a

Understanding respiratory volumes, capacities, and measurements will help me perform my job as a medical assistant because they are significant being a medical assistant. First of all, when the patient is on the bed, I will measure the respiratory rate while he/she is at relaxation. In the next, I will observe the rise and fall of the victim 's chest and count the number of respirations for one full minute. Then, I will record the current time, respiratory rate and respiratory characteristics. Spirometry is used diagnose conditions that affect breathing such as asthma, pulmonary fibrosis, and cystic fibrosis. Spirometry is used periodically to assess whether breathing problems are under control and how well your medications are working. A nebulizer

The aim of this experiment was to investigate how the presence of light affects the rate of transpiration in plants.

A polygraph machine, commonly known as a lie detector, is a machine that monitors and records changes in a person 's physiological characteristics. It is often used for criminal investigations, though employees in a high security career, such as military personnel, may have to undergo polygraph testing as well. While they cannot specifically detect lies, a polygraph machine can record physical responses from a person that are often associated with deception, such as increased blood pressure, sweating, and respiratory rate. Some models can also detect things such as arm and leg movement, but the rates described are the three most common attributes monitored in a polygraph machine.

The purpose of this experiment is to test for mitochondrial activity by isolating different organelles using the differential centrifugation process. Studying mitochondria is extremely important because they control the death and life of the cell by regulating the apoptotic signals (Frezza et al 2007). Also they are responsible for the metabolic reactions (aerobic respiration) and the production of ATP (Frezza et al 2007). Three hypotheses were formed based on my knowledge. First, it was hypothesized that test tube "A", the control, would not show any red concentration, test tube "B" which contains supernatant II would show the most red concentration and test tube "C" which contains sediment II would only show a little red concentration. The second hypothesis states that the raw corn kernels would have mitochondrial activity while the boiled corn kernels would not. The last hypothesis interprets that the "gunk" and sediment I will both contain starch granules. It was only expected to find mitochondrial activity in Supernatant II. Unfortunately, after performing this experiment, we were not able to support this hypothesis and come up with a conclusion. A possible explanation for why there was no mitochondrial activity observed in the boiled corn kernels might be because increasing the temperature would disintegrate dehydrogenases and thus they wouldn't function as efficient or they

Throughout the semester in AP Biology I’ve been able to cover several different topics. These include being able to identify biological processes that require energy, investigating and modeling ways organisms capture and store free energy for use in biological processes and investigating and explaining how organisms respond to changes in their environment. Over the semester I have been able to gain a full understanding and can demonstrate proficiency in each of these components of the curriculum. The work that I have completed involving these topics shows this.

Then after the 2 minutes making the activity, take 2 other minutes to breath and count how many inhalation and exhalation the person have and take note Make that the people stand and breathe for 2 minutes.