Homework Answers
1) O2, CO2 and lipid substances diffuses through the cell membrane.
2) Charged molecules moves according to their electrochemical gradient
3) transportsrs glucose down its gradients.
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Question 1 Which of the following are likely to diffuse through the plasma membrane? glucose K+...
Question 6 In the coupled transport of Na+ and glucose, the transporter transports only when it...
Question 6 In the coupled transport of Na+ and glucose, the transporter transports only when it binds both solutes is an antiporter o only transports glucose down its gradient O uses ATP
Question 33 2.5 pts The Na+-K+ ATPase transporter found in the plasma membrane of most animal...
Question 33 2.5 pts The Na+-K+ ATPase transporter found in the plasma membrane of most animal cells gets its energy from: ATP hydrolysis The electrochemical gradient across the membrane O Co-transport of H+ into the cell None are correct, this transporter functions by facilitated diffusion All are correct
Lo 10: Electrochemical Gradient The difference in voltage across the membrane is called the __________________________________. The...
Lo 10: Electrochemical Gradient The difference in voltage across the membrane is called the __________________________________. The inside of a normal cell is ___________________ (+/-); while the outside is ___________(+/-). The resting membrane potential of a neuron is ___________mV. Diagram the relative ratios of Ca++, Na+ and K+ in a cell under resting conditions. Draw an arrow for each of the molecules indicating which direction would be passive transport (into or out of the cell). For each of the following sentences, fill in...
Roles of the Na+/ K+ pump 1. Maintain the Nat/K+ concentration gradicnt across the plasma membrane....
Roles of the Na+/ K+ pump 1. Maintain the Nat/K+ concentration gradicnt across the plasma membrane. (That's obvious) 2. It plays a role in maintaining the resting membrane potential. Why? 3. The steep electrochemical gradient of Na+ is used in "coupled active transport" (coupled pumps). If the Nat/K+ pump stops, then these Na+ coupled transport mechanisms will also eventually stop. Explain The apical surface of the epithelial cells that line the lumen of the gut contains a symport that used...
Which of the following statements on membrane transport is NOT correct: A. To transport of solutes...
Which of the following statements on membrane transport is NOT correct: A. To transport of solutes in the unfavorable direction across the membrane, pumps couple the process with either ATP hydrolysis, light absorption, electron transport, orother favorable transport process. B. Dissolved gases like O2, CO2, or NO simply diffuse across a membrane bilayer C. Hydrophilic molecules require assistance by membrane proteins to cross the membrane bilayer. D. The rate of transport facilitated by transporters is faster, but less selective for...
WORD BANK For each of the following sentences, fill in the blanks with the best word...
WORD BANK
For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below. Not all words or phrases will be used; each word or phrase should be used only once. _ pathway th Transporter proteins and ion channels function in membrane transport by providing a _pathway through the membrane for specific polar solutes or inorganic ions. A _2__ is highly selective in the solute it transports, binding the solute at...
Question 24 Which of the following categories of membrane proteins is most likely to have restricted...
Question 24 Which of the following categories of membrane proteins is most likely to have restricted lateral mobility in a membrane? enzyme transporter O anchor O receptor all are restricted Question 5 New membrane synthesis occurs by spontaneous aggregation of free phospholipids into a new bilayer incorporation of phospholipids into one face of a preexisting membrane and their specific redistribution by enzymes like flippases incorporation of phospholipids into both faces of a preexisting membrane at the same time formation of...
Not all words or phrases will be used. Each word or phrase should be used only...
Not all words or phrases will be used. Each word or phrase
should be used only once:
membrane potential, free diffusion, hydrophilic, transporter
protein, facilitated diffusion, active transport, concentration,
hydrophobic, noncovalent, amino acid, symport, amphipathic, ion
channel, passive transport, passive, light driven.
For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below. Not all words or phrases will be used; each word or phrase should be used only once....
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)...
Question 18 (6 points, 1 point for each correct answer): Match the following processes (designated I,...
Question 18 (6 points, 1 point for each correct answer): Match the following processes (designated I, II, or III) that represent various types of transport across a biological membrane with the statements designated A-D: 1. Water diffusion through the lipid bilayer of the biomembrane. II. Glucose transport via the glucose transporter in the plasma membrane. III. Pumping of protons across the lysosome membrane by a proton pump similar to the ATP-synthase complex. Write down your answers in the blank space...
Question 6 In the coupled transport of Na+ and glucose, the transporter transports only when it binds both solutes is an antiporter o only transports glucose down its gradient O uses ATP
Question 33 2.5 pts The Na+-K+ ATPase transporter found in the plasma membrane of most animal cells gets its energy from: ATP hydrolysis The electrochemical gradient across the membrane O Co-transport of H+ into the cell None are correct, this transporter functions by facilitated diffusion All are correct
Roles of the Na+/ K+ pump 1. Maintain the Nat/K+ concentration gradicnt across the plasma membrane. (That's obvious) 2. It plays a role in maintaining the resting membrane potential. Why? 3. The steep electrochemical gradient of Na+ is used in "coupled active transport" (coupled pumps). If the Nat/K+ pump stops, then these Na+ coupled transport mechanisms will also eventually stop. Explain The apical surface of the epithelial cells that line the lumen of the gut contains a symport that used...
WORD BANK
For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below. Not all words or phrases will be used; each word or phrase should be used only once. _ pathway th Transporter proteins and ion channels function in membrane transport by providing a _pathway through the membrane for specific polar solutes or inorganic ions. A _2__ is highly selective in the solute it transports, binding the solute at...
Question 24 Which of the following categories of membrane proteins is most likely to have restricted lateral mobility in a membrane? enzyme transporter O anchor O receptor all are restricted Question 5 New membrane synthesis occurs by spontaneous aggregation of free phospholipids into a new bilayer incorporation of phospholipids into one face of a preexisting membrane and their specific redistribution by enzymes like flippases incorporation of phospholipids into both faces of a preexisting membrane at the same time formation of...
Not all words or phrases will be used. Each word or phrase
should be used only once:
membrane potential, free diffusion, hydrophilic, transporter
protein, facilitated diffusion, active transport, concentration,
hydrophobic, noncovalent, amino acid, symport, amphipathic, ion
channel, passive transport, passive, light driven.
For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below. Not all words or phrases will be used; each word or phrase should be used only once....
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)...
Question 18 (6 points, 1 point for each correct answer): Match the following processes (designated I, II, or III) that represent various types of transport across a biological membrane with the statements designated A-D: 1. Water diffusion through the lipid bilayer of the biomembrane. II. Glucose transport via the glucose transporter in the plasma membrane. III. Pumping of protons across the lysosome membrane by a proton pump similar to the ATP-synthase complex. Write down your answers in the blank space...
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