Biological membranes have an almost uniform capacitance of 1 uF / cm2. (1 farad is 1...
Biological membranes have an almost uniform capacitance of 1 uF / cm2. (1 farad is 1 coulomb per volt, and that a volt is a joule / coulomb). The value of ,ε0 is 8.85 x 10-12 coulomb2 joule-1 m-1. If the dielectric constant for the lipids in a membrane is 9, calculate the thickness of the membrane.
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Biological membranes have an almost uniform capacitance of 1 uF
/ cm2. (1 farad is 1...
Lipid bi-layer of all cell membranes can be modeled as a sandwich consisting of two layers of conductors capacitor. The capacitance per unit area (specific capacitance) of cellular membranes was...
Lipid bi-layer of all cell membranes can be modeled as a sandwich consisting of two layers of conductors capacitor. The capacitance per unit area (specific capacitance) of cellular membranes was first determined in the 1920s to have a value of about 1 μF cm' a) State the equation that define the capaoitance of parallel-plate capacitor if a dielectric materials with dielectric permittivity ε fills the space bctwcen plates. [2 pts) b) Write the value of specific capacitance of cellular membranes...
Consider a motor neuron: Diameter = 100 um Permittivity of vacuum = 8.85 x 10-12 Farad/m...
Consider a motor neuron: Diameter = 100 um Permittivity of vacuum = 8.85 x 10-12 Farad/m Dielectric constant of plasma membrane = 8 Faraday's constant = 96,500 coulombs/mol Cell osmolarity = 290 mOsM; estimate 50% are positive ions What percentage of the positive ions within a cell need to cross the membrane to create a -80 mV Em? Hints: Find how much charge is needed to generate Em using Q=C*V (as discussed in class). Convert the charge (coulombs) to moles...
he electric capacitance of biological tissues serves as the basis for numerous medical technologies. For example,...
he electric
capacitance of biological tissues serves as the basis for
numerous medical technologies. For example, dielectric
spectroscopy glucose reading (DSGR) is a noninvasive
diagnostic technique that uses the electric capacitance of blood to
estimate blood glucose levels.
A DSGR device records
the electric current that results from applying a voltage source to
the skin and underlying blood vessels. DSGR can be modeled by the
circuit shown in Figure 1, in which V represents the applied
potential, CB represents the...
The electric capacitance of biological tissues serves as the basis for numerous medical technologies. For example,...
The electric
capacitance of biological tissues serves as the basis for
numerous medical technologies. For example, dielectric
spectroscopy glucose reading (DSGR) is a noninvasive
diagnostic technique that uses the electric capacitance of blood to
estimate blood glucose levels.
A DSGR device records
the electric current that results from applying a voltage source to
the skin and underlying blood vessels. DSGR can be modeled by the
circuit shown in Figure 1, in which V represents the applied
potential, CB represents the...
Question 1 1 pts Using the data provided in the table below for an "average" axon,...
Question 1 1 pts Using the data provided in the table below for an "average" axon, we found in the previous lab and in the pre-lab questions for this lab) that the membrane resistance and membrane capacitance were about 44MN = 44 X 10612 and 60pF = 60 x 10-12 F, respectively, for a membrane segment of length 0.73 mm. Typical values for a neuron under average conditions Axon radius (1) 5x10m Membrane thickness (1) 1x10-6 m Axoplasm resistivity (pa)...
Question 1 1 pts Using the data provided in the table below for an "average" axon,...
Question 1 1 pts Using the data provided in the table below for an "average" axon, we found in the previous lab and in the pre-lab questions for this lab) that the membrane resistance and membrane capacitance were about 44MS2 = 44 x 102 and 60pF = 60 x 10-12 F, respectively, for a membrane segment of length 0.73 mm. Typical values for a neuron under average conditions Axon radius (r) 5x10m Membrane thickness (1) 1x10 m Axoplasm resistivity (pa)...
please answer question 8-13 This is the prior information: Nerve impulses are electrical currents in the...
please answer question 8-13
This is the prior information: Nerve impulses are electrical
currents in the form of “ionic flows.” Therefore the electrical
properties of the axon are important to understand in order to
understand the flow of electrical impulses. In this test, you will
explore the capacitance and resistivity of an axon of a nerve cell.
For this test, the axon will be treated as a CYLINDER of arbitrary
length “L” and radius “a” that is filled with a...
I ONLY NEED HELP WITH QUESTION 2. I JUST POST THE QUESTION 1 just in case...
I ONLY NEED HELP WITH QUESTION 2. I JUST POST THE QUESTION 1
just in case you need it. PLEASE HELP!!!! thank you so much
Question 1 1 pts Using the data provided in the table below for an "average" axon, we found in the previous lab and in the pre-lab questions for this lab) that the membrane resistance and membrane capacitance were about 44MN = 44 x 10Ⓡ12 and 60pF = 60 x 10-12 F. respectively, for a membrane...
(BEKP 2453) PART B ANSWER ONE QUESTION ONLY OCESTION 4 A point charge of 14 uC is located at (2. 5. 9). If V = 12 k...
(BEKP 2453) PART B ANSWER ONE QUESTION ONLY OCESTION 4 A point charge of 14 uC is located at (2. 5. 9). If V = 12 kV at (12,-5, 4), point A is at 3, 2, 6), and point B is at (1, 5, 7) calculate the potential difference VAB caused by the point charge. (8 marks) A hollow cylindrical cable made of brass (o-1.5 x 10' S/m) has a radius of 2 cm and thickness of 0.3 cm. A...
Question 7 (3 Points) This assignment is set up for sequential assessment. Complete each question and...
Question 7 (3 Points) This assignment is set up for sequential assessment. Complete each question and submit the answer before moving on to the next question. Correct answers for each question will be made available once the maximum number of attempts have been made for each submission. Capacitance 3 - Mixed C=K Formulas: Capacitors with dielectrics (with dielectric) (without dielectrie) EA d d E = EA AV = Ed For ALL capacitors Q=CAV + -Q+Q2 -Q2 +Q3 -Q3 Step 1...
Lipid bi-layer of all cell membranes can be modeled as a sandwich consisting of two layers of conductors capacitor. The capacitance per unit area (specific capacitance) of cellular membranes was first determined in the 1920s to have a value of about 1 μF cm' a) State the equation that define the capaoitance of parallel-plate capacitor if a dielectric materials with dielectric permittivity ε fills the space bctwcen plates. [2 pts) b) Write the value of specific capacitance of cellular membranes...
Consider a motor neuron: Diameter = 100 um Permittivity of vacuum = 8.85 x 10-12 Farad/m Dielectric constant of plasma membrane = 8 Faraday's constant = 96,500 coulombs/mol Cell osmolarity = 290 mOsM; estimate 50% are positive ions What percentage of the positive ions within a cell need to cross the membrane to create a -80 mV Em? Hints: Find how much charge is needed to generate Em using Q=C*V (as discussed in class). Convert the charge (coulombs) to moles...
he electric
capacitance of biological tissues serves as the basis for
numerous medical technologies. For example, dielectric
spectroscopy glucose reading (DSGR) is a noninvasive
diagnostic technique that uses the electric capacitance of blood to
estimate blood glucose levels.
A DSGR device records
the electric current that results from applying a voltage source to
the skin and underlying blood vessels. DSGR can be modeled by the
circuit shown in Figure 1, in which V represents the applied
potential, CB represents the...
The electric
capacitance of biological tissues serves as the basis for
numerous medical technologies. For example, dielectric
spectroscopy glucose reading (DSGR) is a noninvasive
diagnostic technique that uses the electric capacitance of blood to
estimate blood glucose levels.
A DSGR device records
the electric current that results from applying a voltage source to
the skin and underlying blood vessels. DSGR can be modeled by the
circuit shown in Figure 1, in which V represents the applied
potential, CB represents the...
Question 1 1 pts Using the data provided in the table below for an "average" axon, we found in the previous lab and in the pre-lab questions for this lab) that the membrane resistance and membrane capacitance were about 44MN = 44 X 10612 and 60pF = 60 x 10-12 F, respectively, for a membrane segment of length 0.73 mm. Typical values for a neuron under average conditions Axon radius (1) 5x10m Membrane thickness (1) 1x10-6 m Axoplasm resistivity (pa)...
Question 1 1 pts Using the data provided in the table below for an "average" axon, we found in the previous lab and in the pre-lab questions for this lab) that the membrane resistance and membrane capacitance were about 44MS2 = 44 x 102 and 60pF = 60 x 10-12 F, respectively, for a membrane segment of length 0.73 mm. Typical values for a neuron under average conditions Axon radius (r) 5x10m Membrane thickness (1) 1x10 m Axoplasm resistivity (pa)...
please answer question 8-13
This is the prior information: Nerve impulses are electrical
currents in the form of “ionic flows.” Therefore the electrical
properties of the axon are important to understand in order to
understand the flow of electrical impulses. In this test, you will
explore the capacitance and resistivity of an axon of a nerve cell.
For this test, the axon will be treated as a CYLINDER of arbitrary
length “L” and radius “a” that is filled with a...
I ONLY NEED HELP WITH QUESTION 2. I JUST POST THE QUESTION 1
just in case you need it. PLEASE HELP!!!! thank you so much
Question 1 1 pts Using the data provided in the table below for an "average" axon, we found in the previous lab and in the pre-lab questions for this lab) that the membrane resistance and membrane capacitance were about 44MN = 44 x 10Ⓡ12 and 60pF = 60 x 10-12 F. respectively, for a membrane...
(BEKP 2453) PART B ANSWER ONE QUESTION ONLY OCESTION 4 A point charge of 14 uC is located at (2. 5. 9). If V = 12 kV at (12,-5, 4), point A is at 3, 2, 6), and point B is at (1, 5, 7) calculate the potential difference VAB caused by the point charge. (8 marks) A hollow cylindrical cable made of brass (o-1.5 x 10' S/m) has a radius of 2 cm and thickness of 0.3 cm. A...
Question 7 (3 Points) This assignment is set up for sequential assessment. Complete each question and submit the answer before moving on to the next question. Correct answers for each question will be made available once the maximum number of attempts have been made for each submission. Capacitance 3 - Mixed C=K Formulas: Capacitors with dielectrics (with dielectric) (without dielectrie) EA d d E = EA AV = Ed For ALL capacitors Q=CAV + -Q+Q2 -Q2 +Q3 -Q3 Step 1...
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