Consider diffusion and convection of a solute that is undergoing transport across a capillary wall. True...
Consider diffusion and convection of a solute that is undergoing transport across a capillary wall.
True or False: Diffusion dominates transport of the solute across the capillary wall?
True
False
Homework Answers
There are various mechanisms for the transport of materials through capillary walls. They are diffusion, bulk flow or convection, vesicular transport and active transport. Out of these, diffusion is the most widely used mechanism. Hence True.
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Consider diffusion and convection of a solute that is undergoing
transport across a capillary wall.
True...
Question 1c: Consider steady–state one dimensional diffusion and convection across a membrane of thickness L. No...
Question 1c: Consider steady–state one dimensional diffusion and convection across a membrane of thickness L. No chemical reactions are occurring. At z=0, C = Φ C0 and at z=L, C = Φ CL, where Φ is the partition coefficient of solute in the membrane. The convection velocity through the membrane is Vz= 1 x10-6 m2/s. Find out concentration in the middle of the membrane (z=L/2). L= 100 μm. Diffusion coefficient in the membrane is 1 x10- 10 m2/s. C0= {C0}...
III. Diffusion in Capillaries Consider a capillary in an alveolus in the lung. The density of oxygen inside the capi...
III. Diffusion in Capillaries Consider a capillary in an alveolus in the lung. The density of oxygen inside the capillary is 0.30 million molecules per cubic micrometer, and in the air outside the density is 5.0 million molecules per cubic micrometer. A) Will oxygen molecules flow in both directions ncross the membrane? In which direction will there be a net flow of oxygen. Explain. B) If the flow rate of oxygen molecules across the capillary membrane is about 4.0 million...
3. True/False. If False, correct the underlined word. [4pts] Capillary Action is the diffusion of water...
3. True/False. If False, correct the underlined word. [4pts] Capillary Action is the diffusion of water through a semipermeable membrane from a high water concentration to a low water concentration. a) b) Cohesion is a property of water. It occurs when water molecules bind to other water molecules forming Hydrogen bonds
A correct distinction between facilitated diffusion and active transport of a substance across a biological membrane...
A correct distinction between facilitated diffusion and active transport of a substance across a biological membrane is that . . . A. active transport requires conformational changes in the transport protein associated with the transport process, and facillitated diffusion does not. B. active transport requires integral membrane protein to carry out the transport, and facillitated diffusion does not. C. facilitated diffusion depends on an existing energy gradient acting on the transported substance, while active transport makes such a gradient. D....
How does the difference in solute concentration across a membrane affect the rate of diffusion?
How does the difference in solute concentration across a membrane affect the rate of diffusion?
Facilitated diffusion: A) transports solute up its concentration gradient. B) transports solute down its concentration gradient. C) does not require a transport protein. D) requires ATP hydrolysis for...
Facilitated diffusion: A) transports solute up its concentration gradient. B) transports solute down its concentration gradient. C) does not require a transport protein. D) requires ATP hydrolysis for transport to occur.
please answer all three or none at all. Thank you. one transporter is Simultaneous transport of...
please answer all three or none at all. Thank you.
one transporter is Simultaneous transport of two molecules across the cell membrane in the same direction by called AV Question 9 (1 point) In carrier protein function kinetics, Km is the solute concentration at which the transport rate is half maximal True False Question 10 (1 point) Transmembrane movement of a substance up a concentration gradient requires facilitated diffusion True False
A differential nitrogen pressure exists across a 2-mm-thick steel furnace wall. After some time, steady-state diffusion...
A differential nitrogen pressure exists across a 2-mm-thick steel furnace wall. After some time, steady-state diffusion of the nitrogen is established across the wall. Given that the nitrogen concentration on the high-pressure surface of the wall is 5 kg/m3kg/m3 and on the low-pressure surface is 0.3 kg/m3 , calculate the flow of nitrogen through the wall (in kg/m2.h) if the diffusion coefficient for nitrogen in this steel is 1.0 ×10−10m2/s at the furnace operating temperature. Express your answer to three...
Questions 19-22, Match the following substances with the mechanisms of transport across membrane into a cell...
Questions 19-22, Match the following substances with the mechanisms of transport across membrane into a cell (May use an answer more than once, but the cel response). each has only 1 correct 19. Chloride lon 20. Steroid Hormones 21. Amino Acids 22. Glucose (A) Simple Diffusion (B) Facilitated Diffusion (C) Osmosis (D) Primary Active Transport Questions 23-25 Answer the following questions using the key (A)Isotonic (B) Hypertonic (C) Hypotonic (D) ALL (E) NONE 23. In which solution is the solute...
III. Diffusion in Capillaries Consider a capillary in an alveolus in the lung. The density of oxygen inside the capillary is 0.30 million molecules per cubic micrometer, and in the air outside the density is 5.0 million molecules per cubic micrometer. A) Will oxygen molecules flow in both directions ncross the membrane? In which direction will there be a net flow of oxygen. Explain. B) If the flow rate of oxygen molecules across the capillary membrane is about 4.0 million...
3. True/False. If False, correct the underlined word. [4pts] Capillary Action is the diffusion of water through a semipermeable membrane from a high water concentration to a low water concentration. a) b) Cohesion is a property of water. It occurs when water molecules bind to other water molecules forming Hydrogen bonds
please answer all three or none at all. Thank you.
one transporter is Simultaneous transport of two molecules across the cell membrane in the same direction by called AV Question 9 (1 point) In carrier protein function kinetics, Km is the solute concentration at which the transport rate is half maximal True False Question 10 (1 point) Transmembrane movement of a substance up a concentration gradient requires facilitated diffusion True False
Questions 19-22, Match the following substances with the mechanisms of transport across membrane into a cell (May use an answer more than once, but the cel response). each has only 1 correct 19. Chloride lon 20. Steroid Hormones 21. Amino Acids 22. Glucose (A) Simple Diffusion (B) Facilitated Diffusion (C) Osmosis (D) Primary Active Transport Questions 23-25 Answer the following questions using the key (A)Isotonic (B) Hypertonic (C) Hypotonic (D) ALL (E) NONE 23. In which solution is the solute...
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