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gas-diffusion

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Journal Articles
The American Biology Teacher. 2017; 79164–67 doi: https://doi.org/10.1525/abt.2017.79.1.64
Published: 01 January 2017
... compact and, in particular, globular shapes can drastically increase the ratio of surface area to volume. Sufficient availability of oxygen is a conditio sine qua non for oxidative reactions and all dependent metabolic processes in higher animals. Fick's laws of gas diffusion can be used to describe...
Journal Articles
The American Biology Teacher. 2020; 823175–177 doi: https://doi.org/10.1525/abt.2020.82.3.175
Published: 01 March 2020
... pressure of carbon dioxide (P CO2 ) in the blood. In order to advance past Start, a player must pass their blue bead (CO 2 ) from their token in the pulmonary capillary to alveolar air, and also pick up a red bead (O 2 ) from alveolar air to their token in the capillary. Each gas will diffuse from the...
Journal Articles
The American Biology Teacher. 2019; 819668–672 doi: https://doi.org/10.1525/abt.2019.81.9.668
Published: 01 December 2019
.... Contraction of the muscles of the aorta propels blood forward along the aorta. Aorta arch; weights 5. A glowing splint can be used to compare the oxygen content of inhaled air and exhaled air. Gas jar; wooden splints; match 6. Reabsorption of water occurs mainly in the colon of the alimentary canal...
Journal Articles
The American Biology Teacher. 2017; 799787–791 doi: https://doi.org/10.1525/abt.2017.79.9.787
Published: 01 November 2017
... Movement............................9:740-I Surface-Area-to-Volume Ratios, Fluid Dynamics & Gas Diffusion: Four Frogs & Their Oxygen Flux............................1:64-TT The Use of a “Ringer” in Natural History Identification Tests............................1:68-TT Traveling with...
Journal Articles
The American Biology Teacher. 2017; 796473–479 doi: https://doi.org/10.1525/abt.2017.79.6.473
Published: 01 August 2017
... the vacuole. Table 2. Writing formal hypotheses. “If” describes the phenomena “If” water diffuses down its diffusion gradient from high to low concentration “because” the hypothesis “because” the concentration of water is higher in pure water than a solution of nonvolatile...
Journal Articles
The American Biology Teacher. 2016; 783200–207 doi: https://doi.org/10.1525/abt.2016.78.3.200
Published: 01 March 2016
... approximately 15 hours, University of Georgia faculty, the company Cogent Education, and the science coach for the Clarke County (GA) School District collaborated to construct a proposal that aligned specific learning goals for an iSTEM day ( Figure 1 ). Upon completion of this document, the science coach...
Journal Articles
The American Biology Teacher. 2016; 7817–13 doi: https://doi.org/10.1525/abt.2016.78.1.7
Published: 01 January 2016
.... Figure 4. A single cell of NRC-1 is shown in an electron micrograph of a thin-section. The gas vesicles are the protein membranes surrounding the clear spaces. The cell is ~2 μm in length. Image by Shiladitya DasSarma. Figure 4. A single cell of NRC-1 is shown in an electron micrograph of a thin...
Journal Articles
The American Biology Teacher. 2014; 764270–271 doi: https://doi.org/10.1525/abt.2014.76.4.10
Published: 01 April 2014
... to the blood of a fish). D, the diffusion constant, expresses how “easily” the gas passes a material layer. S is the surface area over which diffusion takes place, and which separates compartments (e.g., gill or body surface). And ΔC/x describes the concentration gradient between the two compartments...
Journal Articles
The American Biology Teacher. 2014; 769643–647 doi: https://doi.org/10.1525/abt.2014.76.9.14
Published: 01 November 2014
...:328-I, 8:518-I, 9:595-I Forensics.......................9:615-I Forest.......................8:536-I Gas diffusion.......................4:270-Q Gel electrophoresis.......................5:338-I Genes.......................7:460-TT Genetic determinism.......................5...
Journal Articles
The American Biology Teacher. 2013; 756391–395 doi: https://doi.org/10.1525/abt.2013.75.6.6
Published: 01 August 2013
...” experiment. The reason for this choice was partly due to NASA’s safety and containment requirements, which could have been particularly strict had we selected a gas-related experiment. Nevertheless, our results can be applied to other activities usually used to represent diffusion. The hope is that sharing...
Journal Articles
The American Biology Teacher. 2012; 746392–399 doi: https://doi.org/10.1525/abt.2012.74.6.7
Published: 01 August 2012
... Association for Research in Science Teaching, Atlanta, GA, April 17, 1993. Available online at http://www.eric.ed.gov/PDFS/ED360176.pdf . Table 1. Representation continuum. Representation Macroscopic Microscopic Virtual DIFFUSION Food dye in hot or cold water • Represents rates...
Journal Articles
The American Biology Teacher. 2011; 735260–264 doi: https://doi.org/10.1525/abt.2011.73.5.3
Published: 01 May 2011
... twice that of a shrew; and (4) compared with other animals, bats' red blood cells are small, and their number large, making the total surface area for oxygenation larger, enhancing their ability to transport oxygen. All in all, the gas-diffusion capacity of bats is, adjusting for body weight, higher...
Journal Articles
The American Biology Teacher. 2011; 733156–161 doi: https://doi.org/10.1525/abt.2011.73.3.7
Published: 01 March 2011
... had no alveoli at all but were simply two big balloons, with gas exchange occurring at the walls of the balloons? Without each lung having thousands of tiny balloons at the end of each branching pathway, how much surface area would be available for diffusion of gases? The same proportional...
Journal Articles
The American Biology Teacher. 2009; 719554–557 doi: https://doi.org/10.2307/20565380
Published: 01 November 2009
... give the three-dimensional aspect. The Golgi complex looks like a squashed stack of incom pletely-cooked pancakes. The lysosome, with its powerful digestive enzymes, can be compared to a "suicide pill," and cytoskeleton microtubules compared to reinforcing rods of concrete. To illustrate diffusion...
Journal Articles
The American Biology Teacher. 2009; 715305–307 doi: https://doi.org/10.2307/27669436
Published: 01 May 2009
... surface. During drought, soil N,0 concentrations near the surface decreased to levels lower than those in the atmo sphere, leading to the diffusion of the gas from the atmosphere into the soil. This occurred throughout the forest's growing season, but ended when watering was resumed. This is just one...
Journal Articles
The American Biology Teacher. 2009; 713164–167 doi: https://doi.org/10.2307/27669399
Published: 01 March 2009
.... When the battery is incorporated into a circuit, the electrons are allowed to travel from the anode to the cathode, in the cathode, the electrons travel through the carbon into sulfuric acid to produce hydrogen gas. The production and movement of electrons in a battery can power a device. Cellular...
Journal Articles
The American Biology Teacher. 2009; 71227669371 doi: https://doi.org/10.2307/27669371
Published: 01 February 2009
... R?gfl^lM?tl?g vmn <3>o Diffusion, Facilitated Diffusion, Endocytosis/Exocytosis...
Journal Articles
The American Biology Teacher. 2008; 703163–168 doi: https://doi.org/10.2307/30163230
Published: 01 March 2008
.... To put respiration into context, it may be convenient to mention that electron transport is the final step, and it is only here that oxy- gen gas diffuses into the cell and water is formed as a product of respiration (other than CO2). While the room is set up with the mitochondrial membrane (and if...
Journal Articles
The American Biology Teacher. 2007; 697391–406 doi: https://doi.org/10.2307/4452185
Published: 01 September 2007
... Investigating the Process of Diffusion Using an Analytical Puzzle Engage your students to learn about diffusion. Philip Villani Rachel Dunlop Brian Damitz 411 Student-Centered Deliberations of Ethical Care & Use of Animals Engage, explore, explain, and take action on scientific ethics in animal research. John L...
Journal Articles
The American Biology Teacher. 2007; 696364–367 doi: https://doi.org/10.2307/4452179
Published: 01 August 2007
... molecules of 3-phosphoglycerate, a 3-carbon organic acid Ribulose-1,5-bisphosphate, the 5- RuBP carbon sugar that is carboxylated by Rubisco in the first step of the Calvin cycle The pore, surrounded by guard cells, Stoma in the epidermis of leaves and stems through which gas exchange occurs Stroma The...