What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? hints?

1 answer:

8 0

Simple diffusion is the process by which a substance moves across a cell membrane from an area of high concentration to an area of low concentration. Substances that move by simple diffusion are able to diffuse directly across the phospholipid bilayer of the cell membrane. These substances are generally small and neutral, as large or charged particles cannot cross the phospholipid bilayer. Some examples of molecules that move by simple diffusion are carbon dioxide and oxygen.

Facilitated diffusion is the process by which a substance moves across a cell membrane from an area of high concentration to an area of low concentration with the aid of a membrane protein. Substances that move by facilitated diffusion are not able to diffuse directly across the phospholipid bilayer of the cell membrane. These substances are generally large and/or charged. They therefore travel through a protein channel in the cell membrane along their concentration gradient. Some examples of substances that can move by facilitated diffusion are glucose, sodium ions and chloride ions.

The similarities between facilitated diffusion and simple diffusion are:

They both involve the movement of a substance across a cell membrane along its concentration gradient (from an area of high concentration to an area of low concentration).

They are both examples of passive transport, as neither requires energy from the cell to move the substance across the membrane.

You might be interested in

All living things need food and a place to live. Which below is also something all living things need to live? A. a family B. wa

jeka94

The answer is b. Our body is made up of water and so we need to refresh our body from time to time by bringing more water in. The water in the air also helps us get oxygen. Plants take the water and sunlight to do photosynthesis which creates oxygen so we can breathe

5 0

3 years ago

Read 2 more answers

Describe three functions of hair

mote1985 [20]

Im not sure if this will be the answer you teacher is looking for but i think the answer would be

Hair on the head protects scalp from injury and sunlight

Eyelashes and eyebrows protect eyes

Nostril and ear hairs protect from foreign particles

6 0

3 years ago

During protein synthesis, ribosomes are assembled in the nucleolus, pass through the nuclear pores into the cytoplasm, and then

lianna [129]

A. Golgi apparatus :$

5 0

3 years ago

How do plants obtain carbon atoms?

aalyn [17]

C. From carbon dioxide in the atmosphere

5 0

3 years ago

Read 2 more answers

Simone is creating a model to track the movement of carbon atoms in an ecosystem. Which statement best explains the role of plan

Mademuasel [1]

Although I cannot see the model for Simone's experiment, I can offer the insight that the most likely role of plants in the model is that they consume the carbon atoms and produce oxygen.

<h3>How do plants affect the carbon in the atmosphere?</h3>

Plants are known to have a<u> great effect</u> on the carbon levels of the atmosphere.
The correlation is that the more plants are present, the less carbon is free in the air.
The reason for this is that plants use carbon dioxide as a substrate to manage the process of photosynthesis.
As a by-product, after consuming carbon dioxide and completing photosynthesis, plants release oxygen into the atmosphere.

Therefore, we can confirm that the most likely role of plants in the model created by Simone, is that they will consume carbon atoms in the form of carbon dioxide in order to sustain photosynthesis, which releases oxygen.

To learn more about photosynthesis visit:

brainly.com/question/1388366?referrer=searchResults

6 0

2 years ago