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
aksik [14]
3 years ago
11

A membrane that allows onaly some materials to move in and out of the cells is ​

Biology
2 answers:
Allushta [10]3 years ago
8 0

The cell membrane is selectively permeable, allowing only certain substances to pass through. Passive transport is a way that small molecules or ions move across the cell membrane without input of energy by the cell. The three main kinds of passive transport are diffusion, osmosis, and facilitated diffusion.

Anit [1.1K]3 years ago
5 0

That's a Cell Membrane.

You might be interested in
How do differences in structure and or function influence biodiversity among living things
bulgar [2K]
I think it my be a structure to life
3 0
3 years ago
During a hurricane, which factor has the biggest influence on beach erosion?
AveGali [126]
Here you go C <span>storm surge</span>
4 0
3 years ago
Read 2 more answers
Question 1 (3 points)
SVETLANKA909090 [29]

Answer:

1. Electrons

2. thru the circuit from the negative power terminal to the positive power terminal

3. Current

4. Voltage

5. resistance

6. Amps

7. Volts

8. Ohms

9. The voltage is decreased by the electrical resistance.

10. It doesn't work. The electricity can't go backwards thru an LED.

11. The current will decrease.

12. 0.75 amps

13. The current increase

14. an inverse relationship

Explanation:

1. Electrons are what move through a circuit. These electrons are called mobile electrons. Unlike protons and neutrons, they are not confined in the nucleus and are free to move about.

2. Electrons tend to move towards the positive. When an electron moves to a stable atom,the atom would have too much electrons, making it negatively charged. This then would cause a chain reaction of passing on electrons to keep stable.

10.

3 to 8:

Collectively, the flow of electric current is dependent on four things: Voltage, current, resistance, and power.

Voltage is the like the driving force of current. It is the measure of the potential energy or electric potential difference between two points. The unit of voltage is volts, named after Alessandro Volta. You can think of volts as electrical pressure. The higher the voltage, the higher the pressure on the flow of charge.

Current is the "flow" of electrons. It could have another meaning though, in electronics, we refer to current as the volume of the flow of electrons. Current is measured in AMPERES or amps named after Andre M. Ampere. Current is a measure of rate, or the rate of the amount of electrons that flow through a certain point in a circuit, at a given time.

Resistance on the other hand is the opposing force. As electrons move along a circuit, there is bound to be friction. This friction opposes the movement of the electrons, which we call resistance. Resistance uses the unit ohms or the symbol Ω.

These three are all related. The flow of current is affected by how much voltage there is available or pressure available for the movement of the electrons, and at the same time, it is also affected to how much resistance there is in the circuit. And that is where Ohm's Law comes in.

9 and 11-14:

Ohm's Law describes the relationship between current, voltage and resistance. It can be summarized into this formula:

V = IR \rightarrow\; I=\dfrac{V}{R}\rightarrow\;R=\dfrac{V}{I}

Where:

V = voltage

I = Current

R = Resistance

9. When electricity is met with an electrical component, the resistance through that part of the circuit increases. However, the resistance does not change the potential difference between the two points, but rather, it changes the amount of current that flows through. This means that it does not affect the voltage.

11. But on the other hand, for this scenario, the resistance was increased from 10 Ohms to 15 Ohms. Current and resistance have an indirect relationship. This means that as one goes up, the other goes down. As the resistance increases, the less current is able to flow through and thus the current will decrease.

12. Using Ohm's Law we can solve this:

I = \dfrac{V}{R}

The following is our given:

V = 9 V

R = 12 Ω

We plug that in our formula:

I = \dfrac{V}{R}\\\\I = \dfrac{9}{12} = \dfrac{3}{4} = 0.75A

13. As mentioned earlier, current and resistance have an indirect relationship. So when you have this scenario where the resistance  chages from 20 Ω to 12Ω, you see that there is a decrease in resistance. This means that more current can flow through this circuit. So this means that the current increases.

14. was already explained above.

Hope this helps even just a little bit! Good Luck!

4 0
3 years ago
What is the majors metabolic wastes of our body​
Olin [163]

Answer:

They are ammonia, urea, uric acid, and creatinine. All of these substances are produced from protein metabolism.

Metabolic waste is the left over products of both catabolism and anabolism. This waste includes salts, phosphates, sulfates, excess substances, and nitrogenous wastes like urea which are eliminated through urine.

5 0
2 years ago
Anyone know this? thanks
agasfer [191]

Answer:

it's ground water because it just is just put groundwater

5 0
2 years ago
Other questions:
  • Explain how the process of meiosis relates to the way in which a child resembles but is not a copy of his or her exact parents
    12·1 answer
  • Which sugar is present in the nucleic acid that is represented in the diagram?
    10·1 answer
  • ? how does the zeitgeist affect the evolution of a science?
    7·1 answer
  • Which of the following is NOT an organic compound?
    6·2 answers
  • Using at least two examples, explain how the process of evolution is revealed by the imperfections of living organisms.
    15·1 answer
  • Toxic agents that can cross through the placenta and compromise an unborn child's development are known as ________. teratogens
    15·1 answer
  • A rainstorm occurs on a hillside. Within hours, much of the water flows into a lake at the bottom of the hill. What will most li
    12·1 answer
  • Do you think the increased use of these products raises any concerns?.
    15·1 answer
  • PLEASE HELP IF YOU DONT KNOW DONT ANSWER OK THAT NOT WHAT THIS APP IS INTENDED FOR PLEASE GO BY THE RULE OR YOU FACE CONSEQUENCE
    6·1 answer
  • In the early 1980s scientists were able to produce two biomolecules by splicing a human gene
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!