A myelinated axon conducts nerve impulses at a speed of 30m/s . What is the signal...
A myelinated axon conducts nerve impulses at a speed of 30m/s .
What is the signal speed if the thickness of the myelin sheath is halved but no other changes are made to the axon?
Homework Answers
Since the myelin sheath is halved this means that the speed must also be cut in half. Therefore, you just take your speed and divide it by 2 (your units will stay the same).
Add Answer to:
A myelinated axon conducts nerve impulses at a speed of
30m/s
.
What is the signal...
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...
Changing the thickness of the myelin sheath surrounding an axon changes its capacitance and thus the...
Changing the thickness of the myelin sheath surrounding an axon changes its capacitance and thus the conduction speed. A myelinated nerve fiber has a conduction speed of 55 m/s . If the spacing between nodes is 1.1 mm and the resistance of segments between nodes is 26 MΩ , what is the capacitance of each segment? A. C = 1.5×10^-13 F B. C = 7.7x10^-13 F C. C = 5.4x10^-12 F D. C = 1.5x10^-11F
The long thin cylindrical axon of a nerve carries nerve impulses. The axon can be as...
The long thin cylindrical axon of a nerve carries nerve impulses. The axon can be as long as 1 m. A) Estimate the capacitance of a 1.0-m-long axon of radius 3.9 ×10−6 m with a membrane thickness of 7.6 ×10−9 m. The dielectric constant of the membrane material is about 6.0. B)Determine the magnitude of the charge on the inside (negative) and outside (positive) of the membrane wall if there is a 0.065-V potential difference across the wall. C)Determine the...
The long thin cylindrical axon of a nerve carries nerve impulses. The axon can be as...
The long thin cylindrical axon of a nerve carries nerve impulses. The axon can be as long as 1 m A) Estimate the capacitance of a 1.0-m-long axon of radius 4.2 ×10−6 m with a membrane thickness of 8.2 ×10−9 m. The dielectric constant of the membrane material is about 6.0? B) Determine the magnitude of the charge on the inside (negative) and outside (positive) of the membrane wall if there is a 0.079-V potential difference across the wall? C)...
The long thin cylindrical axon of a nerve carries nerve impulses. The axon can be as...
The long thin cylindrical axon of a nerve carries nerve impulses. The axon can be as long as 1 m. a. Estimate the capacitance of a 1.0-m-long axon of radius 3.9 ×10−6 m with a membrane thickness of 7.2 ×10−9 m. The dielectric constant of the membrane material is about 6.0. b. Determine the magnitude of the charge on the inside (negative) and outside (positive) of the membrane wall if there is a 0.077-V potential difference across the wall. c....
The long thin cylindrical axon of a nerve carries nerve impulses. The axon can be as...
The long thin cylindrical axon of a nerve carries nerve impulses. The axon can be as long as 1 m. A) Estimate the capacitance of a 1.0-m-long axon of radius 3.9 ×10−6 m with a membrane thickness of 7.6 ×10−9 m. The dielectric constant of the membrane material is about 6.0. the answer is not 2.8534x10^-8 F B)Determine the magnitude of the charge on the inside (negative) and outside (positive) of the membrane wall if there is a 0.065-V potential...
Please help me solve this problem and show your work. Thank you! Problem 21.81 3 of...
Please help me solve this problem and show your work. Thank
you!
Problem 21.81 3 of 3 I Review The speed with which nerve impulses travel is determined in large part by the characteristic time constant T = 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 26.0 M92. Part A For nerve axons with no protective myelin sheath, the wall capacitance...
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...
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...
The small currents in axons corresponding to nerve impulses produce measurable magnetic fields. A typical axon...
The small currents in axons corresponding to nerve impulses produce measurable magnetic fields. A typical axon carries a peak current of 0.040 ?A What is the strength of the field at a distance of 1.2mm ?
Please help me solve this problem and show your work. Thank
you!
Problem 21.81 3 of 3 I Review The speed with which nerve impulses travel is determined in large part by the characteristic time constant T = 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 26.0 M92. Part A For nerve axons with no protective myelin sheath, the wall capacitance...
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...
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...
Most questions answered within 3 hours.
-
Brian makes $34,100 per year. How much can Brian expect to
contribute to FICA taxes in...
asked 13 minutes ago -
To buy a new house you must borrow $155,000. To do this you take
out a...
asked 29 minutes ago -
Spacely Sprockets is evaluating the construction of a new plant
on land the company purchased for...
asked 1 hour ago -
1. Consider a linear regression model of y on K regressors and
an intercept.
(i) Describe...
asked 1 hour ago -
Enter a balanced equation for the reaction between hydrochloric
acid and sodium sulfite.
Express your answer...
asked 1 hour ago -
Give a regular expression describing the language
{x | x ∈ Σ* and x does not...
asked 1 hour ago -
Masses of 1.0 kg, 2.0 kg, and 3.0 kg are each separately subject
to a net...
asked 1 hour ago -
The mode of philosophical argumentation and thought. How do
philosophers think and write? What is important...
asked 1 hour ago -
At the beginning of the unit, you were asked whether you thought
it was appropriate or...
asked 1 hour ago -
Calculate the grams of carbon in 9.32 x 10+23 molecules of
benzene (C6H6).
asked 1 hour ago -
A 5-year Treasury bond has a 4.95% yield. A 10-year Treasury
bond yields 6.6%, and a...
asked 1 hour ago -
suppose you own a chain of five restaurants in
downtown Vancouver. as the manager, you want...
asked 2 hours ago