What is a metaphor for an antigen?

What is a metaphor for an antigen?

Using the “lock and key” metaphor, the antigen itself can be seen as a string of keys – any epitope being a “key” – each of which can match a different lock.

What are the characteristics of an antigen?

Most antigens have a large molecular weight and are chemically composed of proteins or polysaccharides, but may also be lipids, polypeptides, or nuclear acids, among others. There are low-molecular weight substances which are capable of producing an immune response, called haptens.

How do antibodies work analogy?

A lock and key analogy is often used to describe the shapes of the antibody and antigen. The antigen is the key, hoping to enter into and infect a cell. The antibody is the lock that grips and locks the key, preventing it from entering and infecting cells.

What are antigens examples?

Antigen (definition in biology): any of the various substances that when recognized as non-self by the immune system will trigger an immune response. Examples: allergens, blood group antigens, HLA, substances on the surface of foreign cells, toxins.

What are some examples of antigens?

What are functions of antigens?

An antigen is a molecule that stimulates an immune response by activating leukocytes (white blood cells) that fight disease. Antigens may be present on invaders, such as bacteria, viruses, parasites, fungi, and transplanted organs, or on abnormal cells, such as cancer cells.

Are antigens simple or complex?

Any foreign material—usually of a complex nature and often a protein—that binds specifically to a receptor molecule made by lymphocytes is called an antigen.

What do metaphors and analogies have in common?

Both metaphors and analogies draw comparisons between different things to make a point. Can you correctly identify which one is used in each example in this quiz? Pick the right literary device from the options given for each question.

What is the difference between a simile and an analogy?

A simile is saying something is like something else. A metaphor is often poetically saying something is something else. An analogy is saying something is like something else to make some sort of an explanatory point.

How do you use an analogy in a sentence?

An analogy works by creating a logical argument comparing two things to make a point. Unlike the poetic figure of speech in a metaphor which lets one thing stand for another figuratively, an analogy aims to explain something. An analogy uses two usually unlike things, and draws a conclusion from the direct comparison.

What is an analogy for lymph vessels?

Analogy Lymph vessels interact with Pathogens, lymph fluids, lymphocytes: air conditioner or ventilation system. Antibodies; Analogy: reinforcement of police officers. What’s a good analogy to explain the immune system?