The proteins on cell surfaces that identify cells as 'self' or 'foreign' are called Antigens.

Here's a step-by-step explanation:

1. Every cell has proteins on its surface, which are unique to that individual. These proteins are known as antigens.

2. The immune system uses these antigens to recognize which cells belong to the body ('self') and which are intruders ('foreign').

3. When the immune system encounters a 'foreign' antigen, it triggers an immune response. This can involve producing antibodies to neutralize the foreign cells, or activating other immune cells to destroy them.

4. 'Self' antigens, on the other hand, are recognized by the immune system as part of the body, so they don't trigger an immune response.

5. This system of 'self' and 'foreign' recognition is crucial for the immune system to function correctly. It's what allows the body to defend itself against infections, while avoiding damage to its own cells.

Question

The proteins on cell surfaces that identify cells as 'self' or 'foreign' are called Antigens.

Here's a step-by-step explanation:

1. Every cell has proteins on its surface, which are unique to that individual. These proteins are known as antigens.

2. The immune system uses these antigens to recognize which cells belong to the body ('self') and which are intruders ('foreign').

3. When the immune system encounters a 'foreign' antigen, it triggers an immune response. This can involve producing antibodies to neutralize the foreign cells, or activating other immune cells to destroy them.

4. 'Self' antigens, on the other hand, are recognized by the immune system as part of the body, so they don't trigger an immune response.

5. This system of 'self' and 'foreign' recognition is crucial for the immune system to function correctly. It's what allows the body to defend itself against infections, while avoiding damage to its own cells.

Knowee AI · Accepted Answer

The proteins on cell surfaces that identify cells as 'self' or 'foreign' are called Antigens.

Here's a step-by-step explanation:

1. Every cell has proteins on its surface, which are unique to that individual. These proteins are known as antigens.

2. The immune system uses these antigens to recognize which cells belong to the body ('self') and which are intruders ('foreign').

3. When the immune system encounters a 'foreign' antigen, it triggers an immune response. This can involve producing antibodies to neutralize the foreign cells, or activating other immune cells to destroy them.

4. 'Self' antigens, on the other hand, are recognized by the immune system as part of the body, so they don't trigger an immune response.

5. This system of 'self' and 'foreign' recognition is crucial for the immune system to function correctly. It's what allows the body to defend itself against infections, while avoiding damage to its own cells.

What do we call the proteins on cell surfaces that identify cells as 'self' or 'foreign'?

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