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
Nastasia [14]
4 years ago
8

He cell membrane forms a protective barrier between the external and internal environments. It is referred to as _______________

____, because it allows some substances to cross more easily than others and blocks other substances from crossing into the cell.
Biology
2 answers:
Ray Of Light [21]4 years ago
8 0

Answer:

Selectively permeable

Explanation:

Vsevolod [243]4 years ago
5 0
It is referred to as a selective semipermeable membrane because it only allows certain things through, due to the size and shape of whatever is trying to get through.
You might be interested in
A cell membrane is more flexible than a brick wall. Why might many cells benefit from a flexible cell membrane? and A building h
Fofino [41]

Answer:

plant: This Elodea leaf cell exemplifies a typical plant cell. It has a nucleus, and a stiff cell wall which gives the cell its box-like shape. The numerous green chloroplasts allow the cell to make its own food (by photosynthesis).

The central vacuole takes up most of the volume of the cell. It is transparent, but you can see where it's pressing the chloroplasts up against the cell wall, especially at the ends of the cell.

Like animal cells, the cytoplasm of this plant cell is bordered by a cell membrane. The membrane is so thin and transparent that you can't see it, but it is pressed against the inside of the cell wall.

animal :This human cheek cell is a good example of a typical animal cell. It has a prominent nucleus and a flexible cell membrane which gives the cell its irregular, soft-looking shape.

Like most eukaryotic cells, this cell is very large compared to prokaryotic cells. For scale, notice the pair of dark blue bacteria cells sticking to the right edge of the cheek cell. The bacteria are only a fraction of the size of the nucleus, but their tiny size is typical for bacteria.

4 0
3 years ago
The _____ is a pair of seahorse-shaped structures in the brain that play a central role in memory.
Vlad1618 [11]
Hippocampus is the answer
8 0
3 years ago
_______ are filtering points throughout the body which act to filter bacteria and other large particles from the spaces between
Maurinko [17]
D. Lymph nodes are the filtering points throughout the body... found in the lymphatic system
4 0
3 years ago
What is the equation for the Krebs cycle?
Dominik [7]

Answer:

Acetyl-Coa + 3 NAD + + Q + GDP + Pi + 2H2O >

CoA-SH + 3 NADH + 3 H + + QH2 + GTP + 2 CO2

Explanation:

8 0
3 years ago
Which of the following illustrates how fossil fuels can be conserved?
mina [271]
The answer would be C
8 0
3 years ago
Read 2 more answers
Other questions:
  • Which epidermal layer is structured to resist abrasion, penetration, and water loss?
    5·1 answer
  • The table below shows the scientists who are involved in some major scientific discoveries.
    8·2 answers
  • Where might a plant store carbohydrates ?
    13·2 answers
  • Groundwater can stay underground for long
    11·1 answer
  • Hi i need help please
    5·1 answer
  • Which is a black rat snake considered?<br> carnivore<br> herbivore<br> omnivore
    9·1 answer
  • Select all the types of transport that DO NOT require ATP
    7·2 answers
  • Scientific laws commonly answer which question about the world?
    7·1 answer
  • Which part of an atom occupies most of its mass?​
    10·1 answer
  • - How would you classify the relationship between coral and the small crabs?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!