Active transport across a membrane results in Select one: a. equal concentration of ions on each...
Active transport across a membrane results in
Select one:
a. equal concentration of ions on each side of the membrane.
b. a resting potential of 0 mV.
c. an accumulation of ions on one side of the membrane
d. loss of membrane integrity
e. both choices B and D
Homework Answers
Active transport across a membrane results in - an accumulation of ions on one side of the membrane. Active transport is the process by which ions or molecules move from their low concentration to high concentration with the help of ATP .This results in accumulation of ions on one side of the membrane.
Add Answer to:
Active transport across a membrane results in
Select one:
a. equal concentration of ions on each...
A cell biologist interested in the transport of calcium ions (Ca2+) across the plasma membrane of...
A cell biologist interested in the transport of calcium ions (Ca2+) across the plasma membrane of bacterial cells made the following measurements on bacterial cells at 25°C: Vm = -150 mV [Ca2+] outside = 20 mM [C a2+] inside = 0.4 mM Constants: R = 1.987 cal/mol degree; T = Temperature in Kelvin (273+ °C) , F=23062 cal/mol volt, z=charge of the molecule, Vm =membrane potential in V. Note: ∆Ginwards = +RTln([in]/[out]) + zFVm 94. What is the free energy...
The transport of Na+ ions across a membrane, from a region where the concentration is 1 μM to a region where it is 100 μM, is coupled to the hydrolysis of ATP. Transport is opposed by a membrane poten...
The transport of Na+ ions across a membrane, from a region where the concentration is 1 μM to a region where it is 100 μM, is coupled to the hydrolysis of ATP. Transport is opposed by a membrane potential of 70 mV. Assuming energy coupling is 100% efficient, the hydrolysis of 1 mole of ATP can drive the transport of how many moles of Na+ at 37˚C if the ΔG for ATP hydrolysis is -53.4 kJ/mol under intracellular conditions?
Learning Check The transport of particles across a cell membrane from a low concentration to a...
Learning Check The transport of particles across a cell membrane from a low concentration to a high concentration is called A. facilitated transport B. diffusion C. active transport
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...
Complete each sentence to demonstrate your understanding of the resting membrane potential. Thank you!! Complete each...
Complete each sentence to demonstrate your understanding of the
resting membrane potential.
Thank you!!
Complete each sentence to demonstrate your understanding of the resting membrane potential. opposite The resting membrane potential of a typical neuron is mv. equilibrium potential At rest, the establishes and maintains the concentration gradients for these ions across the plasma membrane When the membrane potential is at the equilibrium potential for a particular ion, there is of the ion through open ion channels, but no Na...
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....
(1) Mitochondria regulate the concentration of calcium ions in the cytoplasm, by allowing the ions to equilibrate across...
(1) Mitochondria regulate the concentration of calcium ions in the cytoplasm, by allowing the ions to equilibrate across the mitochondrial membrane. If the mitochondrion has a membrane potential of –150 mV relative to the cytoplasm, and the cytoplasmic concentration of Ca2+ is 1 μM, what is the mitochondrial Ca2+ concentration? Assume a temperature of 37 C. (2) The membrane calcium pump of the malarial parasite Trypanosoma cruzipumps out calcium ions from the parasite cell interior, hydrolyzing one molecule of ATP...
The equilibrium membrane potentials to be expected across a membrane at 37 ∘ C, with a...
The equilibrium membrane potentials to be expected across a
membrane at 37 ∘ C, with a NaCl concentration of 0.10 M on the
right and 0.01 M on the left, given the following conditions.
Membrane permeable only to Na+: Δψ = +0.0615 V.
Membrane permeable only to Cl−: Δψ = −0.0615 V.
Membrane equally permeable to both ions: Δψ = 0 V.
Will any appreciable transport of material take place in
establishing the membrane potential? Briefly explain each
answer.
Match...
Calcium ions move out of the cell against a concentration gradient. What drives this active transport?...
Calcium ions move out of the cell against a concentration gradient. What drives this active transport? a) vesicles fusing with the membrane b) receptor-mediated exocytosis c) diffusion d) hydrolysis of ATP
Which type of membrane transport protein can perform either passive or active transport? Choose one: A....
Which type of membrane transport protein can perform either passive or active transport? Choose one: A. transporters B. channels C. both channels and transporters D. Neither type of membrane transport protein can perform both passive and active transport.
Learning Check The transport of particles across a cell membrane from a low concentration to a high concentration is called A. facilitated transport B. diffusion C. active transport
Complete each sentence to demonstrate your understanding of the
resting membrane potential.
Thank you!!
Complete each sentence to demonstrate your understanding of the resting membrane potential. opposite The resting membrane potential of a typical neuron is mv. equilibrium potential At rest, the establishes and maintains the concentration gradients for these ions across the plasma membrane When the membrane potential is at the equilibrium potential for a particular ion, there is of the ion through open ion channels, but no Na...
The equilibrium membrane potentials to be expected across a
membrane at 37 ∘ C, with a NaCl concentration of 0.10 M on the
right and 0.01 M on the left, given the following conditions.
Membrane permeable only to Na+: Δψ = +0.0615 V.
Membrane permeable only to Cl−: Δψ = −0.0615 V.
Membrane equally permeable to both ions: Δψ = 0 V.
Will any appreciable transport of material take place in
establishing the membrane potential? Briefly explain each
answer.
Match...
Which type of membrane transport protein can perform either passive or active transport? Choose one: A. transporters B. channels C. both channels and transporters D. Neither type of membrane transport protein can perform both passive and active transport.
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