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
Lunna [17]
3 years ago
10

Nerve signals in the body occur when a small voltage, called an action potential, is applied across the membrane of a cell. When

this action potential is applied across a region of the cell membrane called an ion channel, current in the form of moving potassium ions will be established across the cell. If, during an action potential, a single ion channel with a resistance of 1.8 GΩ, is opened for 1.1 ms, approximately 90000 singly-ionized potassium ions travel through the channel during this time. What was the voltage of the action potential
Physics
2 answers:
Arturiano [62]3 years ago
5 0

Answer:

A stimulus causes sodium channels to open, allowing sodium ions to enter the neuron.

The neuron becomes more positive.

Potassium  channels open, allowing potassium ions to exit the cell.

Sodium channels close and the cell gradually returns to resting levels.

nasty-shy [4]3 years ago
3 0

Answer:  23.56 nV

Explanation:

Assuming that we apply Ohm's Law to this situation, we know that under this condition, the current resultant, is proportional to the voltage applied, and that the proportionality constant, is called the resistance.

Now, we define electric current, as the passage of a number of charges over time.

In this case, we can say that each singly-ionized potassium ion carries the charge equivalent to the one electron, which is q = 1.6. 10⁻¹⁹ coulombs.

So, as we have 90,000 ions, we will have a total charge as follows:

Q =90.10³. 1.6.10⁻¹⁹ coulombs

Also, we are told that this charge will be moving for 1.1 msec, so we can find the current I as follows:

I = Q/t ⇒ I = 13.09. 10⁻¹² A.

If we know that R= 1.8.10⁹ Ω, we can determine V, applying Ohm's Law, as follows:

V = 13.09. 10⁻¹² A .  1.8.10⁹ Ω = 23.56 nV

You might be interested in
Loud of dust and gas in space is a(n) Blank Space __________.
madreJ [45]
A cloud in space that is composed of dust and gas is call a nebula. The word "nebula" is derived from the Latin word for "cloud," and nebulae in space are indeed large interstellar clouds made up of dust, hydrogen, helium and plasma.

6 0
3 years ago
Read 2 more answers
Which of the following energy resources produces greenhouse gases?
Blizzard [7]
Coal is burned to get energy. By burning coal, green houses gases like carbon dioxide, nitrogen oxides and suphur oxides are produced.

Rest of the energy sources given in the option are clean energies.

Answer is A.
4 0
3 years ago
Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a b
AysviL [449]
B is the answer I think
8 0
3 years ago
Relationship between voltage, resistance and current in a circuit
Lena [83]

Answer:

V = I×R

where -

V = potential difference across

I = current flowing in the circuit

R = Equivalent Resistance in the circuit

8 0
3 years ago
What is the strategy you use to solve word problems in physics?
Inga [223]

Answer:

The strategy we would like you to learn has five major steps: Focus the Problem, Physics Description, Plan a Solution, Execute the Plan, and Evaluate the Solution. Let's take a detailed look at each of these steps and then do an sample problem following the strategy.

3 0
2 years ago
Other questions:
  • A bug on the surface of a pond is observed to move up and down a total vertical distance of 6.5 cm , from the lowest to the high
    9·1 answer
  • A motorcycle is capable of accelerating at 4.7 m/s^2, starting from rest, how far can it travel in 3 seconds?
    11·2 answers
  • An object of mass m has these three forces acting on it (there is no normal force, "no surface"). F1 = 5 N, F2 = 8 N, and F3 = 5
    7·1 answer
  • Which of the following phases of the Moon produces the highest and lowest tides on Earth?
    7·2 answers
  • You ride a roller coaster with a loop-the-loop. Compare the normal force that the seat exerts on you to the force that Earth exe
    14·1 answer
  • What is the length of an aluminum rod at 65°C if its length at 15°C is 1.2 meters? A. 0.00180 meter B. 1.201386 meters C. 1.2
    10·2 answers
  • The inner transition metals include the
    5·1 answer
  • A box is being dragged with a horizontal force of 65 N for 12 meters. If there is a force of friction acting on it
    12·1 answer
  • En los sistemas que figuran acontinuación,indica de donde te parece que proviene la energía que usan y aclara si sólo utilizan o
    7·1 answer
  • A scientist discovers a fossil of an animal and places it in the fossil record. The organism’s bones are similar to the bones of
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!