Respiration and Excretion
In this lab we tested to see if respiration was a form of excretion. We were testing for the excretion of salt and water. When testing for the excretion of water, we placed a test strip in our palms/hands and closed them to a fist for 1-2 minutes. We then took a blue test strip of silver nitrate and placed it into a zip lock bag for our control. We would also take to additional blue strips and place one into a zip lock bag and begin respiration process of exhaling into the bag to test for the excretion of water.
For part B we tested for the excretion of salt by rubbing a small piece of cotton in a clean palm, non-cleaned palm, and urine and then placing the cotton into a test tube. 5-6 drops of silver nitrate …show more content…
Two types of respiration are: aerobic and anaerobic (Gordon). Humans go through respiration in the form of breathing.
Positive pressure exhalation: Air flows out the body when chest cavity contracts and the pressure in the chest cavity and lung increase’s (Gordon). When the diaphragm is pressurizing the lungs air and forces it out the mouth, this is an example of positive pressure exhalation.
Negative pressure inhalation: Air flows into the lungs when chest cavity expands and the pressure in the chest cavity and lung decreases (Gordon). The diaphragm creates lower pressure in the lungs with negative pressure inhalation.
Excretion: Elimination of metabolic waste products from the system (Gordon). Urination is a way that the human body uses excretion to eliminate waste.
Hypothesis:
The test strip that we drop water onto will turn completely pink which will show the more evidence of excretion due to the fact that water is a form of excretion. We believe that the strip in our palm will show more signs of excretion than the one in the bag because our palms produce sweat. Since sweat is the excretion of water, we feel it will show a greater amount of excretion then the water from our breath. The strip that was placed in the bag will probably show very little, if any at all, signs of excretion because human breath is not considered to be a main source for …show more content…
Part A was made up of three parts. For the first part, we dropped water on the test strip and see if its color would turn pink. For the second part, we would hold the cobalt chloride test strip in the palm of our hand for a minute or two, to see if there was moisture in the form of sweat on our hands. For the third part of the lab, each person exhaled into the plastic bag until there was moisture developed inside. We would then place the third test strip into the bag and record any
In this lab we tested to see if respiration was a form of excretion. We were testing for the excretion of salt and water. When testing for the excretion of water, we placed a test strip in our palms/hands and closed them to a fist for 1-2 minutes. We then took a blue test strip of silver nitrate and placed it into a zip lock bag for our control. We would also take to additional blue strips and place one into a zip lock bag and begin respiration process of exhaling into the bag to test for the excretion of water.
For part B we tested for the excretion of salt by rubbing a small piece of cotton in a clean palm, non-cleaned palm, and urine and then placing the cotton into a test tube. 5-6 drops of silver nitrate …show more content…
Two types of respiration are: aerobic and anaerobic (Gordon). Humans go through respiration in the form of breathing.
Positive pressure exhalation: Air flows out the body when chest cavity contracts and the pressure in the chest cavity and lung increase’s (Gordon). When the diaphragm is pressurizing the lungs air and forces it out the mouth, this is an example of positive pressure exhalation.
Negative pressure inhalation: Air flows into the lungs when chest cavity expands and the pressure in the chest cavity and lung decreases (Gordon). The diaphragm creates lower pressure in the lungs with negative pressure inhalation.
Excretion: Elimination of metabolic waste products from the system (Gordon). Urination is a way that the human body uses excretion to eliminate waste.
Hypothesis:
The test strip that we drop water onto will turn completely pink which will show the more evidence of excretion due to the fact that water is a form of excretion. We believe that the strip in our palm will show more signs of excretion than the one in the bag because our palms produce sweat. Since sweat is the excretion of water, we feel it will show a greater amount of excretion then the water from our breath. The strip that was placed in the bag will probably show very little, if any at all, signs of excretion because human breath is not considered to be a main source for …show more content…
Part A was made up of three parts. For the first part, we dropped water on the test strip and see if its color would turn pink. For the second part, we would hold the cobalt chloride test strip in the palm of our hand for a minute or two, to see if there was moisture in the form of sweat on our hands. For the third part of the lab, each person exhaled into the plastic bag until there was moisture developed inside. We would then place the third test strip into the bag and record any