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
photoshop1234 [79]
3 years ago
8

A cell membrane is very specific about what it allows across. How does this help the cell?

Biology
2 answers:
Juli2301 [7.4K]3 years ago
7 0
It is better for the cell if most molecules are prevented from entering.
Tcecarenko [31]3 years ago
7 0

Answer: it allows the passage of small molecules for nutrition and metabolism

Explanation:

A cell membrane  constitutes the physical edge, that keeps the cellular content separated from the extracellular environment, and delimits the shape of the cell.

 The lipid bilayer of the membrane acts as a barrier that separates two aqueous media: the medium, where the cell lives, and the cellular internal environment. The cells require nutrients from the outside and must eliminate waste substances from the metabolism. In this way, the membrane keeps their internal environment stable. The membrane has a <em>selective</em> <em>permeability</em>, since it allows the passage of small molecules, which are <em>lipophilic;</em> but regulates the passage of <em>non-lipophilic molecules</em>. Then, most of the water-soluble ions and molecules which are unable to spontaneously cross this barrier,  require the concurrence of special carrier proteins or protein channels.  

You might be interested in
In a forest, rabbits are the prey to owls. An increase in the number of rabbits in the forest would result in Group of answer ch
hichkok12 [17]
The answer is a because if you have more rabbits more owl would want to eat then
3 0
3 years ago
Read 2 more answers
Would we have the Same countries If Pangea existed? And would we look the same?explain please
Natalija [7]
I don’t think we would have the same countries. i feel like everything would be connected, like maybe a few really big countries instead of hundreds of different countries. i feel we would look different that how we already look because there would be more of different type of people around each other, resulting in mixed race reproducing.
8 0
3 years ago
Which of the following statements are true regarding olfaction? Check all that apply. a)Smell is a chemical sense. b)Odorant mol
MrRa [10]

Answer:

A.) Smell is a chemical sense.

B.) Odorant molecules dissolve in mucus before stimulating a receptor

C.) Olfactory receptors have hairs on the apical surface that respond to stimuli

7 0
3 years ago
How might an asteroid impact change earth’s climate
Klio2033 [76]

An asteroid hitting the earth would cause a lot of dust, ash, and other debris to go into the atmosphere which would block the sun which would cause the temperature to decrease.

8 0
3 years ago
Some plants have reproductive structures that help them reproduce using natural forces or animals. How does the reproductive str
mario62 [17]

Answer:No

Explanation:Plants will not just have to rely on one animal to help reproduce. Plants can mimic things such as scents or looks to be an incentive for other animals. Wind and water can also help transport pollen. Plants always have pollinators such as wind, water, insects, and animals. Plants use mimicry in order to attract the biotic pollinators. Plants will never have trouble reproducing because they have so many different pollinators.

6 0
3 years ago
Other questions:
  • You take a hot shower, and water evaporates, producing steam. You notice water on your cold mirror. How did it get there?
    13·2 answers
  • Which summary below correctly describes what occurs during transcription?
    7·2 answers
  • The following is a list of the steps that occur in the production of an auditory sensation. The pressure wave distorts the basil
    11·1 answer
  • based only on their anatomy rank gorillas bears chimpanzees and mice from most recent common ancestor with humans to least recen
    5·1 answer
  • Three phases of interphase and describe an activity unique to each phase
    13·1 answer
  • When treating chlamydia,
    12·1 answer
  • I am the example of plants with woody stems. I am smaller than trees. My branches grow close to the ground. The rose and hibiscu
    5·1 answer
  • Susan is planting her garden and choosing plants at the local plant nursery. She tells the clerk that she wants to plant perenni
    10·2 answers
  • Why is sucking on a Jolly Rancher a chemical change?<br> FULL SENTENCES PLZ
    13·2 answers
  • Which of the following layers in the image is oldest and the youngest
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!