8. For each of the following scenarios described where a molecule or ion is moving from one side of a membrane to the other, select the method by which the molecule or ion is moving. Each answer can be used more than once, or not at all. a. Simple Diffusion b. Facilitated diffusion by a channel protein c. Facilitated diffusion by a carrier/transport protein d. Active transport by a pump e. Could be B or C, not enough information is given • Estrogen is a hydrophobic steroid hormone. It will cross the cell membrane, even if ATP is not available. Glyphosphate (also known as Round-up) is an herbicide that enters the cell. It is a polar molecule. Glyphosphate only enters plant cells if ATP is available. About 78% of the earth's atmosphere is composed of nitrogen gas, N₂. This gas is found in the blood. How does this gas cross the cell membrane of the lung cells and enter the bloodstream? • Cystic fibrosis is a disease caused by the inability of cells to move chlorine ions (Cl-) out of the cell. In normal cells, there is a net flow of chlorine ions from an area of high concentration inside of the cell, to an area of low concentration outside of the cell. Chlorine ions are able to move to the outside of the cell with the help of a protein that does not change shape. Hydrogen cations are small atoms that move from low concentration to high concentration to create a negative membrane potential.
8. For each of the following scenarios described where a molecule or ion is moving from one side of a membrane to the other, select the method by which the molecule or ion is moving. Each answer can be used more than once, or not at all. a. Simple Diffusion b. Facilitated diffusion by a channel protein c. Facilitated diffusion by a carrier/transport protein d. Active transport by a pump e. Could be B or C, not enough information is given • Estrogen is a hydrophobic steroid hormone. It will cross the cell membrane, even if ATP is not available. Glyphosphate (also known as Round-up) is an herbicide that enters the cell. It is a polar molecule. Glyphosphate only enters plant cells if ATP is available. About 78% of the earth's atmosphere is composed of nitrogen gas, N₂. This gas is found in the blood. How does this gas cross the cell membrane of the lung cells and enter the bloodstream? • Cystic fibrosis is a disease caused by the inability of cells to move chlorine ions (Cl-) out of the cell. In normal cells, there is a net flow of chlorine ions from an area of high concentration inside of the cell, to an area of low concentration outside of the cell. Chlorine ions are able to move to the outside of the cell with the help of a protein that does not change shape. Hydrogen cations are small atoms that move from low concentration to high concentration to create a negative membrane potential.
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter4: Cells
Section: Chapter Questions
Problem 6TYK
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Transcribed Image Text:8. For each of the following scenarios described where a molecule or ion is moving from one
side of a membrane to the other, select the method by which the molecule or ion is moving.
Each answer can be used more than once, or not at all.
a. Simple Diffusion
b. Facilitated diffusion by a channel protein
c. Facilitated diffusion by a carrier/transport protein
d. Active transport by a pump
e. Could be B or C, not enough information is given
• Estrogen is a hydrophobic steroid hormone. It will cross the cell membrane, even if ATP
is not available.
• Glyphosphate (also known as Round-up) is an herbicide that enters the cell. It is a polar
molecule. Glyphosphate only enters plant cells if ATP is available.
About 78% of the earth's atmosphere is composed of nitrogen gas, N₂. This gas is found
in the blood. How does this gas cross the cell membrane of the lung cells and enter the
bloodstream?
• Cystic fibrosis is a disease caused by the inability of cells to move chlorine ions (Cl-) out
of the cell. In normal cells, there is a net flow of chlorine ions from an area of high
concentration inside of the cell, to an area of low concentration outside of the cell.
Chlorine ions are able to move to the outside of the cell with the help of a protein that
does not change shape.
• Hydrogen cations are small atoms that move from low concentration to high
concentration to create a negative membrane potential.
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