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Problem 21.81 3 of...
The speed with which nerve impulses travel is determined in large part by the characteristic time...
The speed with which nerve impulses travel is determined in large part by the characteristic time constant τ=RC of the circuit formed by the resistivity of the axon and the capacitance of its wall. The resistance of a 1.00-mm-long segment of an axon is 26.5 MΩ. A) For nerve axons with no protective myelin sheath, the wall capacitance is about 3.24×10−10F for each segment of length L=1.00mm. Find the speed of the nerve impulses given by v=L/τ. B) Many axons...
Problem 19.03: Transmission of nerve impulses. Enhanced-with Solution < 10116 Constants Part A Nerve cells transmit...
Problem 19.03: Transmission of nerve impulses. Enhanced-with Solution < 10116 Constants Part A Nerve cells transmit electric signals through their long tubular axons. These signals propagate due to a sudden rush of Na ions, each with charge +e, into the axon. Measurements have revealed that typically about 5.8x1011 Na ions enter each meter of the axon during a time of 11 ms What is the current during this inflow of charge in a meter of axon? Express your answer using...
Question 3 1 pts Many nerves, for example, motor neurons used in muscle contraction, are wrapped...
Question 3 1 pts Many nerves, for example, motor neurons used in muscle contraction, are wrapped in myelin, a sheath of repeated units of lipid bilayers and proteins. The effect of myelin is to reduce the amount of ions leaking out the membrane, which therefore reduces the degree of amplification of a signal required during de- and repolarization, and, hence, increases the voltage signal speed. With regard to our model circuit, a myelinated axon simply can be represented by an...
Sorry for posting more than one question -- someone said they needed the rest of the...
Sorry for posting more than one question -- someone said they
needed the rest of the questions to better understand how to answer
one!
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 44M0 = 44 x 102 and 60pF = 60 x 10-12 F, respectively, for a membrane segment...
Nerve impulses are carried along axons, the elongated fibers that transmit neural signals. We can model...
Nerve impulses are carried along axons, the elongated fibers that transmit neural signals. We can model an axon as a tube with an inner diameter of 10 μm. The tube wall is insulated, but the fluid inside it has a resistivity of 0.50 Ω⋅m. Part A What is the resistance of a 6.0-mm-long axon? Express your answer with the appropriate units.
please help. thank you For a science experiment, you would like to use the Doppler effect...
please help. thank you
For a science experiment, you would like to use the Doppler effect to double the perceived frequency of a harmonica, from the 261.7. Hx fone (middle C) that it emits, to 440.0 Hz (A note). Part A Which strategy will accomplish your goal more easily O move the harmonica move the observer Submit Request Awwer Part B Calculate the speed the harmonica must have in order for a stationary observer to hear 440.0 Ha Express your...
can someone please help me solve this problem? ure 1 of 1 600 N/m 900 N·m...
can
someone please help me solve this problem?
ure 1 of 1 600 N/m 900 N·m D B 1 m וחן 1 m - C Part A (Figure 1) Determine the internal normal force at point D in the beam. Express your answer to three significant figures and include the appropriate units. HA ? Np= Value Units Submit Request Answer Part B Determine the shear force at point D in the beam. Express your answer to three significant figures and...
Hi please help me do this problem and show your work. Thank you! Problem 21.79 <...
Hi please help me do this problem and show your work. Thank
you!
Problem 21.79 < 2 of 3 II Review A flash unit for a camera has a capacitance of 1800 uF Part A What resistance is needed in this RC circuit if the flash is to charge to 90% of its full charge in 21 s? Express your answer using two significant figures. ΑΣΦ ? R = 544 k12 Submit Previous Answers Request Answer X Incorrect; Try Again;...
Six 5.4-uF capacitors are connected in parallel. Part A What is the equivalent capacitance? Express your...
Six 5.4-uF capacitors are connected in parallel. Part A What is the equivalent capacitance? Express your answer to two significant figures and include the appropriate units. HA ? Cea Value muf Submit Request Answer Part B What is their equivalent capacitance if connected in series? Express your answer to two significant figures and include the appropriate units. μΑ ? Ceg Value muF Submit Request Answer
A pressure-vessel head is fabricated by gluing the circular plate to the end of the vessel...
A pressure-vessel head is fabricated by gluing the circular plate to the end of the vessel as shown in the figure below. The vessel sustains an internal pressure of 490 kPa. (Figure 1) Part A Determine the average shear stress in the glue. Express your answer to three significant figures and include the appropriate units. LA Templates Tave- Value Units Submit Request Answer Figure 1 of 1 Part B Determine the hoop stress in the wall of the vessel. Express...
Problem 19.03: Transmission of nerve impulses. Enhanced-with Solution < 10116 Constants Part A Nerve cells transmit electric signals through their long tubular axons. These signals propagate due to a sudden rush of Na ions, each with charge +e, into the axon. Measurements have revealed that typically about 5.8x1011 Na ions enter each meter of the axon during a time of 11 ms What is the current during this inflow of charge in a meter of axon? Express your answer using...
Question 3 1 pts Many nerves, for example, motor neurons used in muscle contraction, are wrapped in myelin, a sheath of repeated units of lipid bilayers and proteins. The effect of myelin is to reduce the amount of ions leaking out the membrane, which therefore reduces the degree of amplification of a signal required during de- and repolarization, and, hence, increases the voltage signal speed. With regard to our model circuit, a myelinated axon simply can be represented by an...
Sorry for posting more than one question -- someone said they
needed the rest of the questions to better understand how to answer
one!
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 44M0 = 44 x 102 and 60pF = 60 x 10-12 F, respectively, for a membrane segment...
please help. thank you
For a science experiment, you would like to use the Doppler effect to double the perceived frequency of a harmonica, from the 261.7. Hx fone (middle C) that it emits, to 440.0 Hz (A note). Part A Which strategy will accomplish your goal more easily O move the harmonica move the observer Submit Request Awwer Part B Calculate the speed the harmonica must have in order for a stationary observer to hear 440.0 Ha Express your...
can
someone please help me solve this problem?
ure 1 of 1 600 N/m 900 N·m D B 1 m וחן 1 m - C Part A (Figure 1) Determine the internal normal force at point D in the beam. Express your answer to three significant figures and include the appropriate units. HA ? Np= Value Units Submit Request Answer Part B Determine the shear force at point D in the beam. Express your answer to three significant figures and...
Hi please help me do this problem and show your work. Thank
you!
Problem 21.79 < 2 of 3 II Review A flash unit for a camera has a capacitance of 1800 uF Part A What resistance is needed in this RC circuit if the flash is to charge to 90% of its full charge in 21 s? Express your answer using two significant figures. ΑΣΦ ? R = 544 k12 Submit Previous Answers Request Answer X Incorrect; Try Again;...
Six 5.4-uF capacitors are connected in parallel. Part A What is the equivalent capacitance? Express your answer to two significant figures and include the appropriate units. HA ? Cea Value muf Submit Request Answer Part B What is their equivalent capacitance if connected in series? Express your answer to two significant figures and include the appropriate units. μΑ ? Ceg Value muF Submit Request Answer
A pressure-vessel head is fabricated by gluing the circular plate to the end of the vessel as shown in the figure below. The vessel sustains an internal pressure of 490 kPa. (Figure 1) Part A Determine the average shear stress in the glue. Express your answer to three significant figures and include the appropriate units. LA Templates Tave- Value Units Submit Request Answer Figure 1 of 1 Part B Determine the hoop stress in the wall of the vessel. Express...
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