GED Science : Immune System

Study concepts, example questions & explanations for GED Science

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Example Questions

Example Question #1 : Immune System

Which cell type secretes antibodies that attach to pathogens in the body?

Possible Answers:

Macrophages

Red blood cells

T-cell lymphocytes

B-cell lymphocytes

Correct answer:

B-cell lymphocytes

Explanation:

B-cell lymphocytes are responsible for the production of antibodies. These white blood cells secrete antibodies, which bind to and promote the destruction of pathogens

Macrophages attack pathogens directly. T-cell lymphocytes can help attack pathogens as well, and can also trigger B-cells to release antibodies. Red blood cells (erythrocytes) are not involved in the immune response.

Example Question #103 : Ged Science

What blood type could not be given to a person with type A blood in a transfusion?

Possible Answers:

AB blood

O blood

They can receive any of these blood types

A blood

Correct answer:

AB blood

Explanation:

When it comes to blood type, the type of blood you have is determined by the type of antigens present on your red blood cells. For example, people with type A blood have the A antigen on their red blood cells, but not the B antigen. People with O blood have no antigens on their red blood cells. The immune system of a person with A blood will respond negatively to B blood if it is introduced into the body.

A person with type A blood could receive type A blood (A antigens) or type O blood (no antigens), but could not receive type B blood (B antigens) or type AB blood (A and B antigens).

Example Question #2 : Immune System

What is the function of the innate immune system?

Possible Answers:

Attack pathogens that the body is exposed to before birth

Attack all pathogens that enter the body

Attack pathogens that the body has been exposed to during previous infection

Attack pathogens that enter the body through the mouth or nose

Correct answer:

Attack all pathogens that enter the body

Explanation:

Your innate immunity is the generalized system responsible for first attacking incoming infectious agents and toxins. Innate means that it is not necessary to have previously seen the pathogen, and the body always has these general defense mechanisms. Macrophages, neutrophils, and basophils are some of the primary cell types of innate immunity.

In contrast, the adaptive immune system is only effective against pathogens that have previously entered the body. A previous infection will result in the body producing antibodies during any later infections. T-cells and B-cells (lymphocytes) are the primary cell types of adaptive immunity.

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