1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
REY [17]
3 years ago
15

Imagine a postsynaptic neuron is experiencing multiple simultaneous incoming synaptic potentials, which were caused by the activ

ity of several presynaptic neurons. The magnitudes of these synaptic potentials when they reach the postsynaptic cell's axon hillock are given below. Assume the neuron has a normal threshold for firing an action potential that is 15 mV more positive than its resting membrane potential. Based on what you know about spatial summation, will the neuron fire an action potential or not
Biology
1 answer:
SashulF [63]3 years ago
6 0

Answer:

The neuron will not fire an action potential.

Explanation:

The missing magnitudes of the synaptic potentials when they reach the postsynaptic cell's axon hillock are:

A. excitatory +7

B. excitatory +10

C. inhibitory -3

D. excitatory +2

E. inhibitory -4

To fire the action potential, the summation of excitatory postsynaptic potentials (EPSP) and inhibitory postsynaptic potentials (IPSP) must reach the action potential threshold, which in this case is 15mV more positive than the resting potential.

The EPSP are: +7 +10 +2= +19

The IPSP are: -3 - 4= -7

EPSP + IPSP=

+19 -7 = +12 mV

The neuron will not fire an action potential since the integration of EPSP and IPSP is below 15mv.

You might be interested in
Energy to drive the formation of atp in photosynthesis is derived from:.
enot [183]

Answer:

They require light, and their net effect is to convert water molecules into oxygen, while producing ATP molecules—from ADP and Pi—and NADPH molecules—via reduction of NADP+. ATP and NADPH are produced on the stroma side of the thylakoid membrane, where they can be used by the Calvin cycle.

Explanation:please give brainliest

4 0
3 years ago
HURRY PLEASE!
Darina [25.2K]

Answer:

the environment and parasites

4 0
3 years ago
Read 2 more answers
1. How do fossils form?
noname [10]

Explanation:

There is a LOOOONG process for this so here it is;  

First things first.The animal dies. Soft parts of the animal's body, including skin and muscles, start to rot away. Scavengers may come and eat some of the remains.  Before the body disappears completely, it is buried by sediment - usually mud, sand or silt. Often at this point only the bones and teeth remain.  Many more layers of sediment build up on top. This puts a lot of weight and pressure onto the layers below, squashing them. Eventually, they turn into sedimentary rock.  While this is happening, water seeps into the bones and teeth, turning them to stone as it leaves behind minerals.  This process can take thousands or even millions of years.

I hope this answer helped. Thank you!

3 0
2 years ago
What term is used to describe 100’s or 1000’s of amino acids chemically combined?
hjlf

Answer:

Polypeptide

Explanation:

Amino acids are the building block and simplest unit of protein molecules. The structural composition of each amino acids is made up of an amine group (-NH2), a carboxylic acid group (-COOH), a hydrogen atom (H) and a R side chain that differentiates every amino acid from one another.

In a reaction process called condensation, amino acids are chemically joined together via the amine group of one and the carboxylic group of another. This process releases water molecule (H20) to form a bond called PEPTIDE bond between the amino acids. Several amino acids in their 100’s or 1000’s that are chemically joined this way forms a POLYPEPTIDE chain, which in turn forms the protein molecule.

8 0
3 years ago
In the image below, which objects would have a greater gravitational force between them, Objects A and B, or Objects B and C? Gi
Marianna [84]

B and c

Its because heavier objects have a higher gravitational force

5 0
3 years ago
Read 2 more answers
Other questions:
  • A researcher is designing an experiment to determine whether the production of amylase increases when a person anticipates eatin
    11·2 answers
  • The largest amount of air pollution comes from ?
    11·1 answer
  • The movement of water through a plant is caused, in part, by
    10·1 answer
  • A ______ plane passes through the breast, hip, and knee on only one side of the body.
    13·1 answer
  • Cotton plants produce seeds that contain high-quality protein. This protein could be used as a food source except that the seeds
    12·1 answer
  • Describe the flow of energy from the sun to the decomposer ?
    15·1 answer
  • as you start working out you notice that your heart rate and breathing rate starts to increase what division of your nervous sys
    13·1 answer
  • Chapter 19- The Cardiovascular System: The Blood Choose the single best answer to each question.
    6·1 answer
  • Phosphorus is never found in the atmosphere?
    9·2 answers
  • Whats the diffrent between stimulus and response?​
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!