By a mechanism called cotransport,
Question 7
By a mechanism called cotransport,
sugar moves inward down its concentration gradient while sodium moves inward up its concentration gradient Courses
sodium moves outward against its concentration gradient while sugar moves inward down its concentration gradient.
sugar and sodium both move inward down their concentration gradients.
sodium moves inward down its concentration gradient while sugar moves inward up its both sodium and sugar move outward up their concentration gradients.
both sodium and sugar move outward up their concentration gradients.
Question 8
Why do carrier-mediated processes become saturated (choose the best answer)?
The carriers are very specific.
The number of carriers in a membrane is limited.
The concentration gradient is too strong.
The amount of ATP in the cell is limited.
The concentration gradient is too weak.
Homework Answers
7. Sodium moves inside down its concentraion gradient while sugar moves inward up its concentration gradient.
8. The number of carriers in a membrane are limited
QUESTION 2 Which is true of both symporters and antiporters? O Both solutes move up their...
QUESTION 2 Which is true of both symporters and antiporters? O Both solutes move up their concentration gradient. Both solutes move down their concentration gradients. Both require energy to function. • one solute moves down its concentration gradient while the other moves up QUESTION 3 What is the correct order of permeability for the following four substances across a pure phosopholipid bilayer? • 02 > ethanol > Na+ > ATP Na+ > ethanol > 02 > ATP 02> Na+ >...
Match each of the following types of membrane transport with the correct example (some answers may...
Match each of the following types of membrane transport with the correct example (some answers may be used more than once): Calcium is moved out of a cell to the extracellular fluid where the solution of calcium is hypertonic Glucose moves from high concentration in the extracellular fluid around a capillary to an area of lower concentration near a cell A cell with 18 sodium molecules outside and 3 inside moves three of the sodium molecules out while using ATP...
33) Which of the following is most likely true of a protein that cotransports glucose and...
33) Which of the following is most likely true of a protein that cotransports glucose and sodium ions into the intestinal cells of an animal? A) Sodium and glucose bind to the same site on the cotransporter. B) Transport of glucose against its concentration gradient provides energy for uptake of sodium ions against the electrochemical gradient. C) Sodium ions can be transported whether or not glucose is present outside the cell, but glucose transport requires cotransport of sodium ions. D)...
ements. 3 Select the key choices that chancerize each of the followving sta Insert the appropriate...
ements. 3 Select the key choices that chancerize each of the followving sta Insert the appropriate answers in the answer blanks. Key Choices A Active transport B. Diffusion, C. Diffusion, osmosis F.Filtration G. Phagocytosis D. Exocytosis H. Pinocytosis simple E. Facilitated diffusion 1. Receptor-mediated endocytosis 1. Engulfment processes that require ATP 2. Driven by molecular enecgy 3. Driven by hydrostatic (lui) pressure (typically blood pressure in the body) 4. Moves dowh a concentration gradient 5. Moves up (agains) a concentration...
How does facilitated diffusion differ from simple diffusion? Facilitated diffusion requires ATP Facilitated diffusion requires a...
How does facilitated diffusion differ from simple diffusion? Facilitated diffusion requires ATP Facilitated diffusion requires a solute-specific protein carrier Facilitated diffusion transports solute against its’ concentration gradient Which of the following is TRUE about primary active cell membrane transport? It is a form of transport that requires a protein “pump” It is a form of transport that transports ions and/or solute against their concentration gradient It is a transport mechanism that requires energy released from the splitting of ATP by...
1. 2. 3. Select all that apply. The sodium-potassium ion pump: hydrolyzes ATP, utilizing the free...
1.
2.
3.
Select all that apply. The sodium-potassium ion pump: hydrolyzes ATP, utilizing the free phosphate ion to temporarily bind to the transport protein. opens a channel through the membrane by phosphorylating one subunit of the transport protein. D is the only known ion pump. D is mediated by one enzyme that both hydrolyzes ATP and transports the ions. can be run in reverse, phosphorylating ADP to ATP Which of the following describes secondary active transport? O The antiport...
Chapter 3 Cells and Their Functions 6. DESCRIBE METHODS BY WHICH SUBSTANCES ENTER AND LEAVE CELLS...
Chapter 3 Cells and Their Functions 6. DESCRIBE METHODS BY WHICH SUBSTANCES ENTER AND LEAVE CELLS THAT REQUIRE CELLULAR ENERGY. EXERCISE 3-7 Write the appropriate term in each blank from the list below. exocytosis endocytosis active transport diffusion osmosis filtration pinocytosis 1. The process that utilizes a carrier to move materials across the plasma membrane against the concentration gradient using ATP 2. The movement of fluids through a membrane using a pressure gradient 3. The movement of water down its...
Chapter 3 Cells and Their Functions ESCRIBE METHODS BY WHICH SUBSTANCES ENTER AND LEAVE CELLS THAT REQUIRE CELLULAR...
Chapter 3 Cells and Their Functions ESCRIBE METHODS BY WHICH SUBSTANCES ENTER AND LEAVE CELLS THAT REQUIRE CELLULAR ENERGY。 EXERCISE 3-7 Write the appropriate term in each blank from the list below exocytosis endocytosis active transport diffusion osmosis filtration pinocytosis 1. The process that utilizes a carrier to move materials across the plasma membrane against the concentration gradient using ATP 2. The movement of fluids through a membrane using a pressure gradient 3. The movement of water down its concentration...
Question 1 Which of the following are likely to diffuse through the plasma membrane? glucose K+...
Question 1 Which of the following are likely to diffuse through the plasma membrane? glucose K+ Cl- H20 Na+ CO2 02 lipid Question 4 Which is(are) true about transport across the membrane? Channels can perform either active or passive transport Charged molecules move according to their electrochemical gradients Movement of an ion down its gradient requires energy Transporters are faster but less selective than channels Question 6 In the coupled transport of Na+ and glucose, the transporter O is an...
Classify each description or image on the left as the type of molecular transport it portrays....
Classify each description or image on the left as the type of molecular transport it portrays. Simple diffusion Osmosis The cell captures and engulfs large particles A nonwater molecule moves down its concentration gradient, without the help of a carrier molecule or energy input. Your potted ivy plant is wilted, but perks up after you water it. Water moves into a red blood cell, without the help of proteins. Phagocytosis Active transport This type of membrane transport moves substances through...
QUESTION 2 Which is true of both symporters and antiporters? O Both solutes move up their concentration gradient. Both solutes move down their concentration gradients. Both require energy to function. • one solute moves down its concentration gradient while the other moves up QUESTION 3 What is the correct order of permeability for the following four substances across a pure phosopholipid bilayer? • 02 > ethanol > Na+ > ATP Na+ > ethanol > 02 > ATP 02> Na+ >...
Match each of the following types of membrane transport with the correct example (some answers may be used more than once): Calcium is moved out of a cell to the extracellular fluid where the solution of calcium is hypertonic Glucose moves from high concentration in the extracellular fluid around a capillary to an area of lower concentration near a cell A cell with 18 sodium molecules outside and 3 inside moves three of the sodium molecules out while using ATP...
33) Which of the following is most likely true of a protein that cotransports glucose and sodium ions into the intestinal cells of an animal? A) Sodium and glucose bind to the same site on the cotransporter. B) Transport of glucose against its concentration gradient provides energy for uptake of sodium ions against the electrochemical gradient. C) Sodium ions can be transported whether or not glucose is present outside the cell, but glucose transport requires cotransport of sodium ions. D)...
ements. 3 Select the key choices that chancerize each of the followving sta Insert the appropriate answers in the answer blanks. Key Choices A Active transport B. Diffusion, C. Diffusion, osmosis F.Filtration G. Phagocytosis D. Exocytosis H. Pinocytosis simple E. Facilitated diffusion 1. Receptor-mediated endocytosis 1. Engulfment processes that require ATP 2. Driven by molecular enecgy 3. Driven by hydrostatic (lui) pressure (typically blood pressure in the body) 4. Moves dowh a concentration gradient 5. Moves up (agains) a concentration...
1.
2.
3.
Select all that apply. The sodium-potassium ion pump: hydrolyzes ATP, utilizing the free phosphate ion to temporarily bind to the transport protein. opens a channel through the membrane by phosphorylating one subunit of the transport protein. D is the only known ion pump. D is mediated by one enzyme that both hydrolyzes ATP and transports the ions. can be run in reverse, phosphorylating ADP to ATP Which of the following describes secondary active transport? O The antiport...
Chapter 3 Cells and Their Functions 6. DESCRIBE METHODS BY WHICH SUBSTANCES ENTER AND LEAVE CELLS THAT REQUIRE CELLULAR ENERGY. EXERCISE 3-7 Write the appropriate term in each blank from the list below. exocytosis endocytosis active transport diffusion osmosis filtration pinocytosis 1. The process that utilizes a carrier to move materials across the plasma membrane against the concentration gradient using ATP 2. The movement of fluids through a membrane using a pressure gradient 3. The movement of water down its...
Chapter 3 Cells and Their Functions ESCRIBE METHODS BY WHICH SUBSTANCES ENTER AND LEAVE CELLS THAT REQUIRE CELLULAR ENERGY。 EXERCISE 3-7 Write the appropriate term in each blank from the list below exocytosis endocytosis active transport diffusion osmosis filtration pinocytosis 1. The process that utilizes a carrier to move materials across the plasma membrane against the concentration gradient using ATP 2. The movement of fluids through a membrane using a pressure gradient 3. The movement of water down its concentration...
Question 1 Which of the following are likely to diffuse through the plasma membrane? glucose K+ Cl- H20 Na+ CO2 02 lipid Question 4 Which is(are) true about transport across the membrane? Channels can perform either active or passive transport Charged molecules move according to their electrochemical gradients Movement of an ion down its gradient requires energy Transporters are faster but less selective than channels Question 6 In the coupled transport of Na+ and glucose, the transporter O is an...
Classify each description or image on the left as the type of molecular transport it portrays. Simple diffusion Osmosis The cell captures and engulfs large particles A nonwater molecule moves down its concentration gradient, without the help of a carrier molecule or energy input. Your potted ivy plant is wilted, but perks up after you water it. Water moves into a red blood cell, without the help of proteins. Phagocytosis Active transport This type of membrane transport moves substances through...
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