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Rasek [7]
3 years ago
6

Which characteristic makes a cell membrane selectively permeable?

Biology
2 answers:
Feliz [49]3 years ago
7 0
Think about the building you're sitting in right now. What separates you from the outside world? The walls, right? They keep you safe from the elements, but they also let certain things in or out. In a classroom, the doors let students into the right classes, but can keep students out that belong somewhere else.
Let's look at how this translates to cells. Cells are the basic units of life that make up all living things. Cells, just like the rooms they are named for, have an outer barrier to keep the good stuff in and keep the bad stuff out. This barrier is called the cell membrane. The cell membrane has tiny gates that act like doors and windows in a room. This property of only letting certain things in and out is called selective permeability. Let's look closer at what this means.
Evgesh-ka [11]3 years ago
5 0

The cell membrane is said to be selectively permeable because it lets certain substances pass through while restricting the passage of others. The actual structure of the cell membrane allows free passage or restricts movement of substances across the membrane.



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asambeis [7]

A person whose red blood cells agglutinate with anti-B antibodies BUT NOT anti-A antibodies is type AB.

<h3>What is an agglutinate?</h3>

Agglutination is the process by which specific antibodies to antigenic components on the surface of red blood cells or inert particles (direct agglutination) or to antigenic components adsorbed or chemically attached to red blood cells or inert particles produce clumps of cells or inert particles (passive hemagglutination and passive agglutination, respectively).

When antibodies on one RBC attach to the antigen on another RBC, a process known as agglutination, globular to amorphous, grape-like aggregates of RBCs are formed. RBC agglutination supports immune-mediated hemolytic anemia when it is present (IMHA). The majority of IMHA instances do not exhibit agglutination, but when it does, immunoglobulin M (IgM) is the most frequently implicated because of its pentavalent nature. Agglutination, however, might be brought on by a very thick IgG antibody coating of the RBC membranes. Agglutination is typically regarded as IMHA's diagnostic sign.

Learn more about Agglutination here:

brainly.com/question/13022582

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Viktor [21]

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Explanation:

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