Assuming normal resting membrane potential of a cell, if potassium were to leak down its concentration gradient, the result would be: Question 12 options: the inside of the cell would become more negative potassium would leave the cell the inside of the cell would become more positive potassium would enter the cell A and B C and D

Assuming normal resting membrane potential of a cell, if potassium were to leak down its concentration gradient, the result would be: Question 12 options: the inside of the cell would become more negative potassium would leave the cell the inside of the cell would become more positive potassium would enter the cell A and B C and D

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter3: The Plasma Membrane And Membrane Potential

Section: Chapter Questions

Problem 2TAHL: Assume that a membrane permeable to Na+ but not to Cl- separates two solutions. The concentration of...

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What is the intracellular voltage for Cl- if the intracellular concentration was 5 mM and the extracellular concentration was 130 mM. Write the voltage as a number in mV inside the cell relative to that outside, eg. -72 or + 90. Question 2. What is the intracellular voltage for Ca++ if the intracellular concentration was 0.0008 mM and the extracellular concentration was 0.6 mM. Write the voltage as a number in mV inside the cell relative to that outside, eg. -72 or +90. Round to the nearest milli Volt.
Question 4 Place the following events in order of their occurrence. 1. membrane repolarizes 2. K+ voltage gated channels open 3. Na+ voltage gated channels close 4. threshold is reached 5. membrane depolarizes 6. Na+/K+ pump reestablishes resting potential 7. Na+ moves through non-gated channels 8. Na+ voltage gated channels open 9. hyperpolarization then closure of K+ gates 10. membrane depolarizes to peak O 7.5.4.8.10.3.2.1.9.6 O 5.9.4.3.10.1.2.8.6.7. O 3.7.9.5.10.6.4.2.1.8 O9.6.8.10.2.5.7.1.3.4.9. « Previous
Let's say you have neurons in a petrie dish bath in a solution in which the extracellular K+ concentration is 5 mM and the intracellular concentration is 100 mM. Now you flood the dish with a solution containing K+ at 115 mM. What will be the Equilibrium Potential now for the cell (rounded up to the next integer)? O O mv O 4 mv O 70 mv O -70 mv
A resting cell's membrane is more permeable to K+ simply because: K has a higher atomic number than Na. The Na+/K+ ATPase only works in response to a stimulus. There are more voltage-gated K+ channels than voltage-gated Na+ channels in the cell membrane. There are more K+ leaky channels than Na+ leaky channels in the cell membrane.
Answer the following questions about the resting membrane potential of cells (in other words, the electrochemical gradient of a cell at rest). 1. In regards to Na+ and K+, what is the ionic gradient of these ions across the plasma membrane? 2. What is the electrical charge just inside the plasma membrane and just outside the plasma membrane of a cell at rest? 3. What maintains this electrochemical gradient?
Can you help me with this question, please?
Question 6 Which of the following statements about graded potentials and action potentials is true? Answers: a. Action potentials are triggered through the passive spread of membrane depolarization. b. Graded potentials can by produced by the net movement of Nat, CI, or K* across the plasma membrane. c. Graded potentials can occur as the result of either hyperpolarization of depolarization of the plasma membrane. d. All of the statements are true. e. The duration of a graded potential is related to the duration of the stimulus.
When a cell membrane potential shifts from -70mV to -90mV we say the membrane has: depolarized repolarized hyperpolarized polarized GOOO0
Question 2 of 18 Which statement is NOT true about the cells of the nervous system? Select the correct response: A neuron can have only one axon. A neuroglial cell supports or protects a neuron. There may be multiple dendrites on a single cell. A dendrite is the cell part that carries an electrical impulse away from the cell body. A dendrite is a cytoplasmic extension of a neuron.
If the resting membrane potential of a cell was +70 mV, the ELECTRICAL driving force on sodium would be: Group of answer choices into the neuron out of the neuron balanced
If a cell with the following ion concentrations had a resting membrane potential of -40mV which of the following can you conclude? Extracellular: Cl- = 110 mM, Na+ = 145 mM, K+ = 5mM. Intracellular Cl- = 20 mM, Na+ = 10 mM, K+ = 140mM a) At rest it is only permeable to potassium b) At rest it has some permeability to more than one of these ions c) At rest it is only permeable to chloride d) Rest it is not permeable to sodium
You have a semi permeable membrane with a membrane potential of -90mV. You also have two ions that are both permeable to the membrane, Na and Cl. Na has a concentration of 10mM inside the membrane and 120mM outside the membrane. Cl has a concentration of 1.5mM inside the membrane and 77.5mM outside the membrane. Use the nernst equation to calculate the electrochemical equilibrium of both ions, and show in which direction the netflux would be for each ion.

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	the inside of the cell would become more negative
	potassium would leave the cell
	the inside of the cell would become more positive
	potassium would enter the cell
	A and B
	C and D