Question

1) The length of an axon is 10 mm, and its time constant is 4 msec....

1) The length of an axon is 10 mm, and its time constant is 4 msec. A voltage change at one end of the axon is 120 mV, which results in a change of about 10.35 mV at the opposite end after 4 msec. Given this information, what is the length constant of the neuron? ( Input answer in mm, rounded to the nearest whole number, without including the units.)

2) If the diameter of an axon is decreased, and the amount of ion channels stays the same causing membrane resistance to be largely unchanged, what would happen? (State all that apply.)

The length constant increases.

The length constant decreases.

The time constant increases.

The time constant decreases.

Science   Advanced-Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Time constant depends only on membrane resistance and is independent of diameter of the axon, therefore it remains unchanged. Only option 2 is correct.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1-If we decrease the number of ion channels in the membrane, which of the following occurs?...
1-If we decrease the number of ion channels in the membrane, which of the following occurs? (Indicate all that apply.) a-The length constant increases. b-The length constant decreases. c-The time constant increases. d-The time constant decreases. 2-If we decrease the diameter of the axon, and the number of ion channels remains the same (so membrane resistance is largely unchanged), which of the following occurs? (Indicate all that apply.) a-The length constant increases. b-The length constant decreases. c-The time constant increases....
2. The portion of a nerve cell that conducts signals is called an axon. Many of...
2. The portion of a nerve cell that conducts signals is called an axon. Many of the electrical properties of axons are governed by ion channels, which are protein molecules that span the axon’s cell membrane. When open, each ion channel has a pore that is filled with fluid of low resistivity and connects the interior of the cell electrically to the medium outside the cell. In contrast, the lipid-rich cell membrane in which ion channels reside has very high...
16.3 Capacitance 57.     MC A capacitor is first connected to a 6.0-V battery and then disconnected and...
16.3 Capacitance 57.     MC A capacitor is first connected to a 6.0-V battery and then disconnected and connected to a 12.0-V battery. How does its capacitance change: (a) It increases, (b) it decreases, or (c) it stays the same?   58.     MC A capacitor is first connected to a 6.0-V battery and then disconnected and connected to a 12.0-V battery. How does the charge on one of its plates change: (a) It increases, (b) it decreases, or (c) it stays the same?   59.     MC...
QUESTION 14 Given: Net Filtration Pressure = (PC – PIF) – (πC – πIF) IF: capillary...
QUESTION 14 Given: Net Filtration Pressure = (PC – PIF) – (πC – πIF) IF: capillary colloid osmotic pressure = +22 mmHg : interstitial fluid colloid osmotic pressure = +4 mmHg : capillary hydrostatic pressure = +30 mmHg : interstitial fluid hydrostatic pressure = -2 mmHg THEN, the Net Filtration Pressure is _____________ and there is _______________ across the capillary wall. a. -14 mmHg, Net Reabsorption b. 10 mmHg, Net Filtration c. None of the answers given here are correct...
do all five questions Question 1 20 pts Ignoring the effects of air resistance, if a...
do all five questions Question 1 20 pts Ignoring the effects of air resistance, if a ball falls freely toward the ground, its total mechanical energy Group of answer choices increases remains the same not enough information decreases Flag this Question Question 2 20 pts A child jumps off a wall from an initial height of 16.4 m and lands on a trampoline. Before the child springs back up into the air the trampoline compresses 1.8 meters. The spring constant...
Please answer the following Case analysis questions 1-How is New Balance performing compared to its primary...
Please answer the following Case analysis questions 1-How is New Balance performing compared to its primary rivals? How will the acquisition of Reebok by Adidas impact the structure of the athletic shoe industry? Is this likely to be favorable or unfavorable for New Balance? 2- What issues does New Balance management need to address? 3-What recommendations would you make to New Balance Management? What does New Balance need to do to continue to be successful? Should management continue to invest...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT