Homework Answers
C. None of these answer are correct.
It is because potassium ion movement toward the cell is more than the sodium ion movement outside the cell which created the potential difference with negative charge within the cell.
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QUESTION 5 Animal cells have a negative membrane potential; why is this O A. All of...
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
QUESTION 39 Whereas animal cells drive indirect transport across the plasma membrane with a Na+ gradient,...
QUESTION 39 Whereas animal cells drive indirect transport across the plasma membrane with a Na+ gradient, other organisms like plants and bacteria use O A a glucose gradient B. a Ca2+ gradient C. a proton gradient D. osmosis E. endocytosis and exocytosis. Flight energy
Question 4 2 pts During and action potential, sodium (Na+) rushes into the cell causing of...
Question 4 2 pts During and action potential, sodium (Na+) rushes into the cell causing of the cell. Then sodium channels close and potassium (K+) rushes out of the cell, causing of the cell. However, the potassium overshoots and causes Question 5 2 pts During the refractory period, the pumps Na+ ions out of the cell and K+ions into the cell, re-establishing the resting membrane potential and concentration gradient. Serotonin Acetylcholine Glutamate Endorphins Barbiturates GABA Dopamine Cocaine Sodium Potassium Calcium...
Question 49 1.67 pts Neurons have a negative resting potential. When they are conducting an action...
Question 49 1.67 pts Neurons have a negative resting potential. When they are conducting an action potential, the resting potential becomes more positive (depolarization) followed by a drop in the resting potential (repolarization). What is the order and direction of the ion movement responsible for these changes? Potassium (K+) rushes out, then sodium (Na+) rushes into the cell Chloride (Cl-) rushes out, then potassium (K) rushes into the cell Potassium (K+) rushes in, then sodium (Na+) rushes out of the...
_____membranes proteins are associated with the bilayer through interactions with other membrane component on the surface...
_____membranes proteins are associated with the bilayer through interactions with other membrane component on the surface of the membrane. Net movement of particles from a region where they are more concentrated to a region where they are law concentrated is called Diffusion of water through a selectively permeable membrane down its own concentration gradient It called A solution with an equivalent concentration of water and hence the tame osmotic pressure as the fluid inside the cell is said to be...
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)...
1. Animal cells have a Na,K pump that couples the energy of ATP hydrolysis to transport 3 Na ions out of the cell and 2 K ions into the cell. Inside astrocytes, the concentration of Na is 20 mM and th...
1. Animal cells have a Na,K pump that couples the energy of ATP hydrolysis to transport 3 Na ions out of the cell and 2 K ions into the cell. Inside astrocytes, the concentration of Na is 20 mM and the concentration of K is 130 mM. The extracellular concentrations of Na and K are 145 mM and 5 mM, respectively. Calculate the energy required for the transport of Na and K , with this stoichiometry; assume that the cell...
Question 17 3 pts Neurons cells are found in the nervous system and provide direct protection...
Question 17 3 pts Neurons cells are found in the nervous system and provide direct protection and physical support to the neurons. One protein made by these cells is myelin that is essential in neurological function as seen in epilepsy where the degeneration of the protein is observed and patients experience neurological symptoms. J Oection 10 Ante Question 15 2 pts Which one of the following establishes and maintains the resting potential of cells across the cell membrane? Na+ leak...
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...
Neurons are electrically excitable cells in the nervous system that function to process and transmit information...
Neurons are electrically excitable cells in the nervous system that function to process and transmit information from one part the body to another, through specialized connections called synapses. The signaling process is partly electrical and partly chemical. In vertebrate animals, neurons are the core components of the brain, spinal cord and peripheral nerves. Neurons carry messages in the form of electrical signals called nerve impulses or action potentials. An action potential occurs when the resting membrane potential at a specific...
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
QUESTION 39 Whereas animal cells drive indirect transport across the plasma membrane with a Na+ gradient, other organisms like plants and bacteria use O A a glucose gradient B. a Ca2+ gradient C. a proton gradient D. osmosis E. endocytosis and exocytosis. Flight energy
Question 4 2 pts During and action potential, sodium (Na+) rushes into the cell causing of the cell. Then sodium channels close and potassium (K+) rushes out of the cell, causing of the cell. However, the potassium overshoots and causes Question 5 2 pts During the refractory period, the pumps Na+ ions out of the cell and K+ions into the cell, re-establishing the resting membrane potential and concentration gradient. Serotonin Acetylcholine Glutamate Endorphins Barbiturates GABA Dopamine Cocaine Sodium Potassium Calcium...
Question 49 1.67 pts Neurons have a negative resting potential. When they are conducting an action potential, the resting potential becomes more positive (depolarization) followed by a drop in the resting potential (repolarization). What is the order and direction of the ion movement responsible for these changes? Potassium (K+) rushes out, then sodium (Na+) rushes into the cell Chloride (Cl-) rushes out, then potassium (K) rushes into the cell Potassium (K+) rushes in, then sodium (Na+) rushes out of the...
_____membranes proteins are associated with the bilayer through interactions with other membrane component on the surface of the membrane. Net movement of particles from a region where they are more concentrated to a region where they are law concentrated is called Diffusion of water through a selectively permeable membrane down its own concentration gradient It called A solution with an equivalent concentration of water and hence the tame osmotic pressure as the fluid inside the cell is said to be...
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 17 3 pts Neurons cells are found in the nervous system and provide direct protection and physical support to the neurons. One protein made by these cells is myelin that is essential in neurological function as seen in epilepsy where the degeneration of the protein is observed and patients experience neurological symptoms. J Oection 10 Ante Question 15 2 pts Which one of the following establishes and maintains the resting potential of cells across the cell membrane? Na+ leak...
Neurons are electrically excitable cells in the nervous system that function to process and transmit information from one part the body to another, through specialized connections called synapses. The signaling process is partly electrical and partly chemical. In vertebrate animals, neurons are the core components of the brain, spinal cord and peripheral nerves. Neurons carry messages in the form of electrical signals called nerve impulses or action potentials. An action potential occurs when the resting membrane potential at a specific...
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