Homework Answers
The option which is FALSE is - Gated channels facilitate the passafe of small, nonpolar molecules such as O2 across the plasma membrane.
Explanation :
Non-polar molecules such as O2 pass through the plasma membrane by the process of simple diffusion down their concentration gradient.
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Which of the following statement(s) regarding gated channels is/are FALSE? Gated channels facilitate the passage of...
choices for A: Na+/K+ pumps, voltage gated K+ channels, voltage gated Ca+ channels, voltage gated Na+...
choices for A: Na+/K+ pumps, voltage gated K+ channels,
voltage gated Ca+ channels, voltage gated Na+ channels
choices for B: bidirectionally, unidirectionally
choices for C: Na+/K+ pumps, voltage gated K+ channels,
voltage gated Ca+ channels, voltage gated Na+ channels
choices for D: Na+/K+ pumps, voltage gated K+ channels,
voltage gated Ca+ channels, voltage gated Na+ channels
Consider this graph illustrating the generation of an action potential across the plasma membrane of a stimulated neuron. +40 ACTION POTENTIAL plasma membrane potential...
09. Which of the followine statements regarding channel proteins (shown below (shown below) is for propratic...
09. Which of the followine statements regarding channel proteins (shown below (shown below) is for propratic of all a. Channel proteins can assist polar molecules to cross the plasma membrane by facilitated diffusion b. The gated ion channel can allow ions to pass when stimulated to open. c. The surface of a channel protein in contact with the bilayer would likely have hydrophilic amino acids d. Water plays a role in determining which ions are allowed to pass through an...
21. The fluid in blood vessels and the Interstitial space is referred to as: a. The...
21. The fluid in blood vessels and the Interstitial space is referred to as: a. The extracellular fluid compartment b. Plasma c. The Intracellular fluid compartment 22. Why is the resting cell membrane more permeable to K+ than to Na+? a. Because gated K+ channels are always open. b. Because K+ can diffuse through the phospholipid bilayer of the resting cell membrane and Na+ cannot. c. Because the cell membrane contains Leak (ungated) K+ Channels. 23. Lipid soluble molecules, carbon...
Please help me with several of these questions, thank you very much. 1. During the propagation...
Please help me with several of these questions, thank you very much. 1. During the propagation of an action potential along the axon of a neuron, what is happening at the leading edge (the front) of the region of depolarization as it moves down the axon? a. Ligand-gated Na+channels are opening. b. Voltage-gated Na+channels are opening. c. Ligand-gated K+channels are opening. d. Voltage-gated Na+channels have become inactive and refractory. e. Voltage-gated Na+channels are closing. 2. During transcellular transport of glucose...
Choose the item in column 2 that best matches each item in column 1. You may...
Choose the item in column 2 that best matches each item in column 1. You may use a column 2 item more than once. A requires direct ATP hydrolysis CO2, O2, H20 driven by an ion gradient - A active transport and indirect active transport transports glucose across membranes Bindirect active transport B. Na glucose symport facilitated diffusion (passive transport) Na */ ATPase pump D, active transport F. transports small, nonpolar molecules facilitated diffusion and active transport A F. simple...
Please summarize this chapter typed clearly. Diffusion Is a passive process of transport. A single substance...
Please summarize this chapter
typed clearly.
Diffusion Is a passive process of transport. A single substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across a space. Facilitated transport Facilitated diffusion is the process of spontaneous passive transport of molecules or ions across a biological membrane via specific transmembrane integral proteins. Channels The integral proteins involved in facilitated transport are collectively referred to as transport proteins, and they...
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...
Question 2 Which of the following best describes how both symport and antiport transporters move two...
Question 2 Which of the following best describes how both symport and antiport transporters move two different types of molecules? They move two molecule types down both of their electrochemical gradients. They move two molecule types up both of their electrochemical gradients. They move one molecule type up and one down their electrochemical gradients. They move two molecule types into the cytosol. They move two molecule types out of the cell. They use ATP to power active transport. Question 3...
help with key word matching Match some of the keywords found in chapters with their correct...
help with key word matching
Match some of the keywords found in chapters with their correct definition Phospholipid Oncogene A A type of diffusion that occurs down a concentration gradient B. This process occurs during exocytosis C. A localized redistribution of ions across the cell membrane, resulting in a shift of the membrane potential (Vm) to more positive values. D. The normal function of this dass of mutant gene is "regulates the cell cycle" Channels Electrochemical The membrane potential (Vm)...
FILL THE BLANK The membranes of fishes that live in extreme cold have a high proportion...
FILL THE BLANK The membranes of fishes that live in extreme cold have a high proportion of _________________ hydrocarbon tails, enabling them to stay fluid.For example, cold-adapted organisms such as winter wheat increase the percentage of _________________ phospholipids in their membranes in the autumn to prevent the membranes from solidifying during winter.There are two major populations of membrane proteins: ___________ and _____________.Integral proteins penetrate the hydrophobic interior of the lipid bilayer, usually completely spanning the membrane as ________________ proteins.________________ proteins...
choices for A: Na+/K+ pumps, voltage gated K+ channels,
voltage gated Ca+ channels, voltage gated Na+ channels
choices for B: bidirectionally, unidirectionally
choices for C: Na+/K+ pumps, voltage gated K+ channels,
voltage gated Ca+ channels, voltage gated Na+ channels
choices for D: Na+/K+ pumps, voltage gated K+ channels,
voltage gated Ca+ channels, voltage gated Na+ channels
Consider this graph illustrating the generation of an action potential across the plasma membrane of a stimulated neuron. +40 ACTION POTENTIAL plasma membrane potential...
09. Which of the followine statements regarding channel proteins (shown below (shown below) is for propratic of all a. Channel proteins can assist polar molecules to cross the plasma membrane by facilitated diffusion b. The gated ion channel can allow ions to pass when stimulated to open. c. The surface of a channel protein in contact with the bilayer would likely have hydrophilic amino acids d. Water plays a role in determining which ions are allowed to pass through an...
21. The fluid in blood vessels and the Interstitial space is referred to as: a. The extracellular fluid compartment b. Plasma c. The Intracellular fluid compartment 22. Why is the resting cell membrane more permeable to K+ than to Na+? a. Because gated K+ channels are always open. b. Because K+ can diffuse through the phospholipid bilayer of the resting cell membrane and Na+ cannot. c. Because the cell membrane contains Leak (ungated) K+ Channels. 23. Lipid soluble molecules, carbon...
Choose the item in column 2 that best matches each item in column 1. You may use a column 2 item more than once. A requires direct ATP hydrolysis CO2, O2, H20 driven by an ion gradient - A active transport and indirect active transport transports glucose across membranes Bindirect active transport B. Na glucose symport facilitated diffusion (passive transport) Na */ ATPase pump D, active transport F. transports small, nonpolar molecules facilitated diffusion and active transport A F. simple...
Please summarize this chapter
typed clearly.
Diffusion Is a passive process of transport. A single substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across a space. Facilitated transport Facilitated diffusion is the process of spontaneous passive transport of molecules or ions across a biological membrane via specific transmembrane integral proteins. Channels The integral proteins involved in facilitated transport are collectively referred to as transport proteins, and they...
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...
help with key word matching
Match some of the keywords found in chapters with their correct definition Phospholipid Oncogene A A type of diffusion that occurs down a concentration gradient B. This process occurs during exocytosis C. A localized redistribution of ions across the cell membrane, resulting in a shift of the membrane potential (Vm) to more positive values. D. The normal function of this dass of mutant gene is "regulates the cell cycle" Channels Electrochemical The membrane potential (Vm)...
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