ZuoTi.Pro
Question

Assume that a single Inhibitory Postsynaptic Potential (IPSP) has a negative magnitude of -0.5mV at the...

Assume that a single Inhibitory Postsynaptic Potential (IPSP) has a negative magnitude of -0.5mV at the axon hillock, and that a single Excitatory Postsynaptic Potential (EPSP) has a positive magnitude of +0.5mV. For a neuron with initial membrane potential of -70mV, calculate the net effect of the simultaneous arrival of 6 IPSPs and 2 EPSPs on the membrane potential. Show your work.

science   biology   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

Strength of a single IPSP= -0.5mV

Hence, strength of 6 IPSPs= 6*(-0.5) = -3.0mV

Strength of a single EPSP= +0.5mV

Hence, strength of 2 EPSPs= 2*(+0.5) = +1.0mV

Now, combined strength of signals

= -3.0mV +1.0mV = -2.0mV

Therefore, for a neuron with initial membrane potential of -70mV, the arrival of the signals would result in a final membrane potential of -72mV.

0 0
Add a comment
Know the answer?
Add Answer to:
Assume that a single Inhibitory Postsynaptic Potential (IPSP) has a negative magnitude of -0.5mV at the...
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. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • Inhibitory postsynaptic potentials (IPSPs) are associated with ___________________ of the cell membrane. Excitatory Postsynaptic Potential (EPSP)...

    Inhibitory postsynaptic potentials (IPSPs) are associated with ___________________ of the cell membrane. Excitatory Postsynaptic Potential (EPSP) are associated with ___________________ of the cell membrane.

  • 1. Draw a set of EPSPs and IPSPs that will initiate an action potential. You must...

    1. Draw a set of EPSPs and IPSPs that will initiate an action potential. You must use at least 4 IPSPs to reach threshold and initiate an action potential. Use a normal action potential graph as an example. Each EPSP is +6 mV and each IPSP is -2 mV (I totally made these numbers up). You can put the EPSP and IPSP in any order, alternating or, however. Resting potential is -70mV and threshold is -50 mV. An example of...

  • Fifteen different presynaptic neurons synapse on a single postsynaptic neuron. The postsynaptic neuron has a RMP...

    Fifteen different presynaptic neurons synapse on a single postsynaptic neuron. The postsynaptic neuron has a RMP of -70 mV. At the trigger zone, 14 of the presynaptic neurons produce excitatory postsynaptic potentials of 2 mV each, and the other one produces an inhibitory postsynaptic potential of 9 mV. The threshold for the postsynaptic neuron is -50 mV. Will action potentials be produced in the postsynaptic neuron? Is this an example of temporal summation or spatial summation? Explain your answers.

  • According to Scott Freeman. answer the following questions 1. In a single neuron, what is the...

    According to Scott Freeman. answer the following questions 1. In a single neuron, what is the typical direction of signals? a. axon to dendrite to cell body b. dendrite to cell body to axon c. axon to cell body to dendrite 2. For an action potential to occur, the membrane potential of a neuron must become_________, until it reaches the________. a1. more positive, b1. more negative a2. repolarization phase b2. resting membrane potential c2. threshold potential d2. hyperpolarization phase 3....

  • According to Scott Freeman, 1. Which of the 2 factors listed, best determine the membrane potential...

    According to Scott Freeman, 1. Which of the 2 factors listed, best determine the membrane potential of a neuron? a. concentration gradient across the membrane b. charge gradient across the membrane c. the surface area of a neuronal membrane d. the threshold potential of the membrane 2. In a single neuron, what is the typical direction of signals? a. axon to dendrite to cell body b. dendrite to cell body to axon c. axon to cell body to dendrite 3....

  • QUESTION 11 . THE RESTING POTENTIAL IS CAUSED BY . . A. . the rotation of...

    QUESTION 11 . THE RESTING POTENTIAL IS CAUSED BY . . A. . the rotation of charged particles . . B. . the uneven distribution of ions inside and outside the cell . . C. . the release of ions by neighboring neurons . . D. . the axon hillock . 1 points    QUESTION 12 . WHICH NEUROTRANSMITTER PLAYS A ROLE IN REINFORCEMENT AND ADDICTION . . A. . dopamine . . B. . acetyl choline . . C....

  • If a postsynaptic neuron has several excitatory and inhibitory synapses active at the same time, that...

    If a postsynaptic neuron has several excitatory and inhibitory synapses active at the same time, that postsynaptic neuron __________ fire an action potential. For example, if we are looking a yellow object, both our red and green cones are activated; however, we do not perceive that object as red or green because the signals from the red and green cones to “green-on” and “red-on” ganglion cells will _________. In addition to multiple synapses affecting the likelihood of an action potential...

  • What is a resting potential? Is it positive or negative? The resting potential is mainly due...

    What is a resting potential? Is it positive or negative? The resting potential is mainly due to the main _____-charged large molecules stuck inside the neuron. The Na+/K+ pump pushes Na+ _____ of the cell and K+ ____ of the cell (in or out for each ion) Where is K+ concentrated, inside or outside of the neuron? Where is Na+ concentrated, inside or outside of the neuron? The action potential starts with an rise in membrane voltage. This is due...

  • 17) An IPSP (Inhibitory Postsynaptic Potential) can result from the opening of potassium ion channels can...

    17) An IPSP (Inhibitory Postsynaptic Potential) can result from the opening of potassium ion channels can result from the opening of chloride ion channels increases the membrane potential towards threshold A & B A & C B & C 18) Saltatory Conduction Occurs only in myelinated axons Occurs in all axons Allows action potentials to travel more quickly down an axon A & B A & C B & C 19) A diarthrosis is: A freely moveable joint A slightly...

  • change pas channels in the volta t ive protein to change shape. This A of the...

    change pas channels in the volta t ive protein to change shape. This A of the S l e terminal siste oplasmic reticum calcio p r eneule warcoplasm reticulum sodium ions m o nster transverse tubules sarcolemma: calcium ions Saroplasmic reticum: triadsarcolemma: calcium ions sons bind to This causes a change in shape and exposing C D E Calcium vesicle tylcholine action potential Sodium sarcolemma calcium on myosin heads Sodium sacoplasmic reticulum calcium ions actin 15. An attaches to exposed...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT