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
IrinaVladis [17]
3 years ago
9

When the facilitated diffusion necessary

Biology
2 answers:
Vlad1618 [11]3 years ago
8 0

Answer:

When the molecules size are large, and they are insoluble in lipids, at this time facilitated diffusion is necessary to transport such molecules across the plasma membrane.

Explanation:

Facilitated diffusion is one type of passive transport. It occurs from higher concentration to lower concentration. This diffusion depends on the size of the particle, the solubility of the membrane. The smaller size particles can move faster across the membrane but the bigger particles can't pass the plasma membrane. Another fact is the entire plasma membrane is made up of lipids. It can't allow the lipid insoluble particles to the membrane. For this, there is a special facility to carry such polar molecules like water, such as channels, carrier proteins, porins. These channels facilitate the bigger polar molecules to enter into the membrane and cross the membrane. The enzymes like permease act as channel proteins that bind with the bigger particles and carry them through the channels. This type of diffusion also needs ATP like passive diffusion.

andrey2020 [161]3 years ago
7 0

In biology, diffusion is the movement of substances with the concentration gradient, which means they move from an area of high concentration to an area of low concentration. Facilitated diffusion is diffusion that is performed with the help of a carrier protein that can move particles of the substance.

You might be interested in
A nerve is actually a long threadlike bundle of ________ that conduct electrical impulses.
KonstantinChe [14]

A nerve is actually a long threadlike bundle of dendrites that conduct electrical impulses.

<span>Dendrite word derived from the Greek word ‘dendron’ which means tree. They carry messages in the form of electrical impulses to cell body, there are also wire like nerves called axon. Sensory nerves and motor nerves are common types of nerves.</span>

7 0
3 years ago
I am a real "powerhouse" 
Bond [772]
Mitochondria is the powerhouse of the cell. Only thing I remember from middle school science
6 0
2 years ago
Explain mendel's experiment with peas on inheritence of characters considering only one visible contrasting character.
m_a_m_a [10]

➜ <u>Mendel conducted breeding experiments with garden peas</u>:

[i] He studied plants (pure) of a tall/short varities.

[ii] He crossed them and obtained F1 progeny.

[iii] He found that F1 progeny was all tall plants.

[iv] He selfed the (hybrid) plants if F1 progeny.

[v] He found that in F2 progeny there were tall as well as short plants.

[vi] The three quarter plants were tall and one quarter was short.

(or any other contrasting character may be taken).

<u>Note</u>: Here, F1 means <u>First fillial generation</u> and F2 means <u>Second fillial generation</u>.

7 0
3 years ago
Read 2 more answers
What is a genotype? ________________________________________________________________________
OLEGan [10]

Sheeeeeeeshhhh

Explanation:

GIVE brainliest to the another guy even know he copy from go.ogle!

7 0
3 years ago
Read 2 more answers
What type of molecules can diffuse through a membrane?
olga2289 [7]
A- small and uncharged
4 0
2 years ago
Other questions:
  • RNA polymerase possesses its own helicase enzymatic activity. This means that once it binds to a promoter of a gene, it can
    8·1 answer
  • Describe the role of each 3 of RNA<br>​
    11·1 answer
  • 6.
    11·1 answer
  • Which unit is used for measuring atomic mass?
    5·2 answers
  • The idea that energy cannot be created or destroyed
    14·1 answer
  • Which of the following is an example of homeostasis? A. During a time of high stress, Justin's heart races, his muscles tense, a
    15·1 answer
  • Keyori is making a model to illustrate the functions of ADP and ATP in photosynthesis. Which model best illustrates the role of
    9·1 answer
  • Listed in the Item Bank are key terms and expressions, each of which is associated with one of the columns. Some terms may displ
    13·1 answer
  • Plzzzz help ASAP
    5·1 answer
  • As a river transitions to less steep land, it gets wider and slower and
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!